MAYBE Ultimate: Cannot open display: This is Ultimate 0.1.24-8dc7c08-m [2020-06-22 08:08:24,795 INFO L170 SettingsManager]: Resetting all preferences to default values... [2020-06-22 08:08:24,797 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2020-06-22 08:08:24,808 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-06-22 08:08:24,809 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-06-22 08:08:24,810 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-06-22 08:08:24,811 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-06-22 08:08:24,812 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2020-06-22 08:08:24,814 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-06-22 08:08:24,815 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-06-22 08:08:24,816 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-06-22 08:08:24,816 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-06-22 08:08:24,817 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-06-22 08:08:24,817 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-06-22 08:08:24,819 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-06-22 08:08:24,819 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-06-22 08:08:24,820 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-06-22 08:08:24,822 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-06-22 08:08:24,824 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2020-06-22 08:08:24,825 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-06-22 08:08:24,826 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-06-22 08:08:24,827 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-06-22 08:08:24,829 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-06-22 08:08:24,830 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-06-22 08:08:24,830 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-06-22 08:08:24,831 INFO L174 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-06-22 08:08:24,831 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-06-22 08:08:24,832 INFO L177 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-06-22 08:08:24,832 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-06-22 08:08:24,833 INFO L174 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-06-22 08:08:24,833 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-06-22 08:08:24,834 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2020-06-22 08:08:24,835 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-06-22 08:08:24,835 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2020-06-22 08:08:24,836 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-06-22 08:08:24,836 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-06-22 08:08:24,836 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2020-06-22 08:08:24,837 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2020-06-22 08:08:24,838 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2020-06-22 08:08:24,838 INFO L98 SettingsManager]: Beginning loading settings from /export/starexec/sandbox2/solver/bin/./../termcomp2017.epf [2020-06-22 08:08:24,853 INFO L110 SettingsManager]: Loading preferences was successful [2020-06-22 08:08:24,853 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2020-06-22 08:08:24,854 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-06-22 08:08:24,854 INFO L133 SettingsManager]: * Rewrite not-equals=true [2020-06-22 08:08:24,855 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2020-06-22 08:08:24,855 INFO L133 SettingsManager]: * Minimize states using LBE with the strategy=SINGLE [2020-06-22 08:08:24,855 INFO L133 SettingsManager]: * Use SBE=true [2020-06-22 08:08:24,855 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-06-22 08:08:24,855 INFO L133 SettingsManager]: * Use old map elimination=false [2020-06-22 08:08:24,856 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2020-06-22 08:08:24,856 INFO L133 SettingsManager]: * Buchi interpolant automaton construction strategy=DANDELION [2020-06-22 08:08:24,856 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2020-06-22 08:08:24,856 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-06-22 08:08:24,856 INFO L133 SettingsManager]: * Construct termination proof for TermComp=true [2020-06-22 08:08:24,856 INFO L133 SettingsManager]: * Command for external solver (GNTA synthesis)=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 08:08:24,857 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-06-22 08:08:24,857 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-06-22 08:08:24,857 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2020-06-22 08:08:24,857 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2020-06-22 08:08:24,857 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-06-22 08:08:24,858 INFO L133 SettingsManager]: * How to treat unsigned ints differently from normal ones=IGNORE [2020-06-22 08:08:24,858 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-06-22 08:08:24,858 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-06-22 08:08:24,858 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-06-22 08:08:24,858 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 [2020-06-22 08:08:24,859 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-06-22 08:08:24,859 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-06-22 08:08:24,859 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2020-06-22 08:08:24,859 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-06-22 08:08:24,884 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-06-22 08:08:24,897 INFO L259 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-06-22 08:08:24,901 INFO L215 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-06-22 08:08:24,902 INFO L271 PluginConnector]: Initializing CDTParser... [2020-06-22 08:08:24,902 INFO L276 PluginConnector]: CDTParser initialized [2020-06-22 08:08:24,903 INFO L430 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /export/starexec/sandbox2/benchmark/theBenchmark.c [2020-06-22 08:08:25,000 INFO L221 CDTParser]: Created temporary CDT project at /export/starexec/sandbox2/tmp/4ee864a6890e4a9da44cb5a4532ab3b4/FLAG9118dcfe9 [2020-06-22 08:08:25,336 INFO L307 CDTParser]: Found 1 translation units. [2020-06-22 08:08:25,337 INFO L161 CDTParser]: Scanning /export/starexec/sandbox2/benchmark/theBenchmark.c [2020-06-22 08:08:25,337 WARN L117 ultiparseSymbolTable]: System include stdlib.h could not be resolved by CDT -- only built-in system includes are available. [2020-06-22 08:08:25,344 INFO L355 CDTParser]: About to delete temporary CDT project at /export/starexec/sandbox2/tmp/4ee864a6890e4a9da44cb5a4532ab3b4/FLAG9118dcfe9 [2020-06-22 08:08:25,738 INFO L363 CDTParser]: Successfully deleted /export/starexec/sandbox2/tmp/4ee864a6890e4a9da44cb5a4532ab3b4 [2020-06-22 08:08:25,749 INFO L297 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-06-22 08:08:25,751 INFO L131 ToolchainWalker]: Walking toolchain with 7 elements. [2020-06-22 08:08:25,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-06-22 08:08:25,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-06-22 08:08:25,756 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2020-06-22 08:08:25,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.06 08:08:25" (1/1) ... [2020-06-22 08:08:25,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a340979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:08:25, skipping insertion in model container [2020-06-22 08:08:25,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.06 08:08:25" (1/1) ... [2020-06-22 08:08:25,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-06-22 08:08:25,784 INFO L176 MainTranslator]: Built tables and reachable declarations [2020-06-22 08:08:25,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-06-22 08:08:25,958 INFO L191 MainTranslator]: Completed pre-run [2020-06-22 08:08:26,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-06-22 08:08:26,046 INFO L195 MainTranslator]: Completed translation [2020-06-22 08:08:26,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:08:26 WrapperNode [2020-06-22 08:08:26,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-06-22 08:08:26,047 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-06-22 08:08:26,047 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-06-22 08:08:26,047 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2020-06-22 08:08:26,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:08:26" (1/1) ... [2020-06-22 08:08:26,065 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:08:26" (1/1) ... [2020-06-22 08:08:26,086 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-06-22 08:08:26,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-06-22 08:08:26,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-06-22 08:08:26,086 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2020-06-22 08:08:26,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:08:26" (1/1) ... [2020-06-22 08:08:26,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:08:26" (1/1) ... [2020-06-22 08:08:26,097 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:08:26" (1/1) ... [2020-06-22 08:08:26,098 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:08:26" (1/1) ... [2020-06-22 08:08:26,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:08:26" (1/1) ... [2020-06-22 08:08:26,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:08:26" (1/1) ... [2020-06-22 08:08:26,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:08:26" (1/1) ... [2020-06-22 08:08:26,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-06-22 08:08:26,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-06-22 08:08:26,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-06-22 08:08:26,112 INFO L276 PluginConnector]: RCFGBuilder initialized [2020-06-22 08:08:26,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:08:26" (1/1) ... No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 [2020-06-22 08:08:26,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-06-22 08:08:26,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-06-22 08:08:26,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-06-22 08:08:26,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-06-22 08:08:26,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-06-22 08:08:26,381 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-06-22 08:08:26,382 INFO L286 CfgBuilder]: Removed 9 assue(true) statements. [2020-06-22 08:08:26,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 08:08:26 BoogieIcfgContainer [2020-06-22 08:08:26,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-06-22 08:08:26,384 INFO L113 PluginConnector]: ------------------------BlockEncodingV2---------------------------- [2020-06-22 08:08:26,384 INFO L271 PluginConnector]: Initializing BlockEncodingV2... [2020-06-22 08:08:26,386 INFO L276 PluginConnector]: BlockEncodingV2 initialized [2020-06-22 08:08:26,387 INFO L185 PluginConnector]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 08:08:26" (1/1) ... [2020-06-22 08:08:26,402 INFO L313 BlockEncoder]: Initial Icfg 19 locations, 21 edges [2020-06-22 08:08:26,404 INFO L258 BlockEncoder]: Using Remove infeasible edges [2020-06-22 08:08:26,404 INFO L263 BlockEncoder]: Using Maximize final states [2020-06-22 08:08:26,405 INFO L270 BlockEncoder]: Using Minimize states even if more edges are added than removed.=false [2020-06-22 08:08:26,405 INFO L276 BlockEncoder]: Using Minimize states using LBE with the strategy=SINGLE [2020-06-22 08:08:26,407 INFO L296 BlockEncoder]: Using Remove sink states [2020-06-22 08:08:26,408 INFO L171 BlockEncoder]: Using Apply optimizations until nothing changes=true [2020-06-22 08:08:26,408 INFO L179 BlockEncoder]: Using Rewrite not-equals [2020-06-22 08:08:26,433 INFO L185 BlockEncoder]: Using Use SBE [2020-06-22 08:08:26,462 INFO L200 BlockEncoder]: SBE split 8 edges [2020-06-22 08:08:26,467 INFO L70 emoveInfeasibleEdges]: Removed 1 edges and 0 locations because of local infeasibility [2020-06-22 08:08:26,469 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-06-22 08:08:26,503 INFO L100 BaseMinimizeStates]: Removed 10 edges and 5 locations by large block encoding [2020-06-22 08:08:26,505 INFO L70 RemoveSinkStates]: Removed 9 edges and 2 locations by removing sink states [2020-06-22 08:08:26,507 INFO L70 emoveInfeasibleEdges]: Removed 0 edges and 0 locations because of local infeasibility [2020-06-22 08:08:26,507 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-06-22 08:08:26,507 INFO L100 BaseMinimizeStates]: Removed 0 edges and 0 locations by large block encoding [2020-06-22 08:08:26,508 INFO L70 RemoveSinkStates]: Removed 0 edges and 0 locations by removing sink states [2020-06-22 08:08:26,508 INFO L313 BlockEncoder]: Encoded RCFG 12 locations, 20 edges [2020-06-22 08:08:26,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 22.06 08:08:26 BasicIcfg [2020-06-22 08:08:26,509 INFO L132 PluginConnector]: ------------------------ END BlockEncodingV2---------------------------- [2020-06-22 08:08:26,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-06-22 08:08:26,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-06-22 08:08:26,513 INFO L276 PluginConnector]: TraceAbstraction initialized [2020-06-22 08:08:26,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.06 08:08:25" (1/4) ... [2020-06-22 08:08:26,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef07d4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 08:08:26, skipping insertion in model container [2020-06-22 08:08:26,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:08:26" (2/4) ... [2020-06-22 08:08:26,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef07d4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 08:08:26, skipping insertion in model container [2020-06-22 08:08:26,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 08:08:26" (3/4) ... [2020-06-22 08:08:26,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef07d4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 08:08:26, skipping insertion in model container [2020-06-22 08:08:26,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 22.06 08:08:26" (4/4) ... [2020-06-22 08:08:26,517 INFO L112 eAbstractionObserver]: Analyzing ICFG theBenchmark.c_BEv2 [2020-06-22 08:08:26,527 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2020-06-22 08:08:26,535 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-06-22 08:08:26,552 INFO L257 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-06-22 08:08:26,581 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2020-06-22 08:08:26,582 INFO L382 AbstractCegarLoop]: Interprodecural is true [2020-06-22 08:08:26,582 INFO L383 AbstractCegarLoop]: Hoare is true [2020-06-22 08:08:26,582 INFO L384 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2020-06-22 08:08:26,582 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-06-22 08:08:26,582 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-06-22 08:08:26,582 INFO L387 AbstractCegarLoop]: Difference is false [2020-06-22 08:08:26,583 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-06-22 08:08:26,583 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-06-22 08:08:26,597 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-06-22 08:08:26,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-06-22 08:08:26,603 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:08:26,603 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-06-22 08:08:26,606 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONILLEGAL_POINTER_ARITHMETIC]=== [2020-06-22 08:08:26,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:08:26,611 INFO L82 PathProgramCache]: Analyzing trace with hash 3653978, now seen corresponding path program 1 times [2020-06-22 08:08:26,613 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:08:26,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:08:26,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:08:26,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:08:26,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:08:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:08:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-06-22 08:08:26,771 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:08:26,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-06-22 08:08:26,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-06-22 08:08:26,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-06-22 08:08:26,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:08:26,794 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-06-22 08:08:26,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:08:26,854 INFO L93 Difference]: Finished difference Result 12 states and 20 transitions. [2020-06-22 08:08:26,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-06-22 08:08:26,856 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-06-22 08:08:26,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:08:26,867 INFO L225 Difference]: With dead ends: 12 [2020-06-22 08:08:26,867 INFO L226 Difference]: Without dead ends: 11 [2020-06-22 08:08:26,871 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:08:26,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-06-22 08:08:26,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-06-22 08:08:26,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-06-22 08:08:26,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 18 transitions. [2020-06-22 08:08:26,905 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 18 transitions. Word has length 4 [2020-06-22 08:08:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:08:26,905 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 18 transitions. [2020-06-22 08:08:26,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-06-22 08:08:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 18 transitions. [2020-06-22 08:08:26,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-06-22 08:08:26,906 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:08:26,906 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-06-22 08:08:26,907 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONILLEGAL_POINTER_ARITHMETIC]=== [2020-06-22 08:08:26,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:08:26,907 INFO L82 PathProgramCache]: Analyzing trace with hash 3653980, now seen corresponding path program 1 times [2020-06-22 08:08:26,907 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:08:26,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:08:26,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:08:26,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:08:26,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:08:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:08:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-06-22 08:08:26,942 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:08:26,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-06-22 08:08:26,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-06-22 08:08:26,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-06-22 08:08:26,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-06-22 08:08:26,944 INFO L87 Difference]: Start difference. First operand 11 states and 18 transitions. Second operand 4 states. [2020-06-22 08:08:26,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:08:26,982 INFO L93 Difference]: Finished difference Result 12 states and 18 transitions. [2020-06-22 08:08:26,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-06-22 08:08:26,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-06-22 08:08:26,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:08:26,983 INFO L225 Difference]: With dead ends: 12 [2020-06-22 08:08:26,983 INFO L226 Difference]: Without dead ends: 11 [2020-06-22 08:08:26,984 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-06-22 08:08:26,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-06-22 08:08:26,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-06-22 08:08:26,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-06-22 08:08:26,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 17 transitions. [2020-06-22 08:08:26,987 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 17 transitions. Word has length 4 [2020-06-22 08:08:26,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:08:26,988 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 17 transitions. [2020-06-22 08:08:26,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-06-22 08:08:26,988 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 17 transitions. [2020-06-22 08:08:26,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-06-22 08:08:26,988 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:08:26,988 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-06-22 08:08:26,989 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONILLEGAL_POINTER_ARITHMETIC]=== [2020-06-22 08:08:26,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:08:26,989 INFO L82 PathProgramCache]: Analyzing trace with hash 3653981, now seen corresponding path program 1 times [2020-06-22 08:08:26,989 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:08:26,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:08:26,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:08:26,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:08:26,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:08:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:08:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-06-22 08:08:27,017 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:08:27,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-06-22 08:08:27,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-06-22 08:08:27,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-06-22 08:08:27,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:08:27,019 INFO L87 Difference]: Start difference. First operand 11 states and 17 transitions. Second operand 3 states. [2020-06-22 08:08:27,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:08:27,051 INFO L93 Difference]: Finished difference Result 11 states and 17 transitions. [2020-06-22 08:08:27,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-06-22 08:08:27,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-06-22 08:08:27,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:08:27,053 INFO L225 Difference]: With dead ends: 11 [2020-06-22 08:08:27,053 INFO L226 Difference]: Without dead ends: 10 [2020-06-22 08:08:27,053 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:08:27,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-06-22 08:08:27,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-06-22 08:08:27,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-06-22 08:08:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 16 transitions. [2020-06-22 08:08:27,056 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 16 transitions. Word has length 4 [2020-06-22 08:08:27,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:08:27,057 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 16 transitions. [2020-06-22 08:08:27,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-06-22 08:08:27,057 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 16 transitions. [2020-06-22 08:08:27,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-06-22 08:08:27,057 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:08:27,058 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-06-22 08:08:27,058 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONILLEGAL_POINTER_ARITHMETIC]=== [2020-06-22 08:08:27,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:08:27,058 INFO L82 PathProgramCache]: Analyzing trace with hash 113274074, now seen corresponding path program 1 times [2020-06-22 08:08:27,058 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:08:27,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:08:27,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:08:27,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:08:27,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:08:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:08:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-06-22 08:08:27,088 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:08:27,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-06-22 08:08:27,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-06-22 08:08:27,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-06-22 08:08:27,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:08:27,089 INFO L87 Difference]: Start difference. First operand 10 states and 16 transitions. Second operand 3 states. [2020-06-22 08:08:27,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:08:27,126 INFO L93 Difference]: Finished difference Result 10 states and 16 transitions. [2020-06-22 08:08:27,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-06-22 08:08:27,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-06-22 08:08:27,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:08:27,127 INFO L225 Difference]: With dead ends: 10 [2020-06-22 08:08:27,127 INFO L226 Difference]: Without dead ends: 9 [2020-06-22 08:08:27,128 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:08:27,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-06-22 08:08:27,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-06-22 08:08:27,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-06-22 08:08:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14 transitions. [2020-06-22 08:08:27,131 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 14 transitions. Word has length 5 [2020-06-22 08:08:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:08:27,131 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 14 transitions. [2020-06-22 08:08:27,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-06-22 08:08:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 14 transitions. [2020-06-22 08:08:27,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-06-22 08:08:27,132 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:08:27,132 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-06-22 08:08:27,132 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONILLEGAL_POINTER_ARITHMETIC]=== [2020-06-22 08:08:27,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:08:27,132 INFO L82 PathProgramCache]: Analyzing trace with hash 113274076, now seen corresponding path program 1 times [2020-06-22 08:08:27,132 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:08:27,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:08:27,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:08:27,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:08:27,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:08:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:08:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-06-22 08:08:27,175 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:08:27,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-06-22 08:08:27,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-06-22 08:08:27,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-06-22 08:08:27,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-06-22 08:08:27,177 INFO L87 Difference]: Start difference. First operand 9 states and 14 transitions. Second operand 4 states. [2020-06-22 08:08:27,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:08:27,216 INFO L93 Difference]: Finished difference Result 15 states and 22 transitions. [2020-06-22 08:08:27,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-06-22 08:08:27,217 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-06-22 08:08:27,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:08:27,219 INFO L225 Difference]: With dead ends: 15 [2020-06-22 08:08:27,219 INFO L226 Difference]: Without dead ends: 14 [2020-06-22 08:08:27,220 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-06-22 08:08:27,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-06-22 08:08:27,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2020-06-22 08:08:27,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-06-22 08:08:27,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 16 transitions. [2020-06-22 08:08:27,225 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 16 transitions. Word has length 5 [2020-06-22 08:08:27,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:08:27,225 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 16 transitions. [2020-06-22 08:08:27,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-06-22 08:08:27,225 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 16 transitions. [2020-06-22 08:08:27,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-06-22 08:08:27,226 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:08:27,226 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-06-22 08:08:27,226 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONILLEGAL_POINTER_ARITHMETIC]=== [2020-06-22 08:08:27,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:08:27,226 INFO L82 PathProgramCache]: Analyzing trace with hash 113274077, now seen corresponding path program 1 times [2020-06-22 08:08:27,227 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:08:27,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:08:27,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:08:27,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:08:27,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:08:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:08:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-06-22 08:08:27,275 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:08:27,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-06-22 08:08:27,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-06-22 08:08:27,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-06-22 08:08:27,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-06-22 08:08:27,277 INFO L87 Difference]: Start difference. First operand 10 states and 16 transitions. Second operand 5 states. [2020-06-22 08:08:27,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:08:27,339 INFO L93 Difference]: Finished difference Result 14 states and 21 transitions. [2020-06-22 08:08:27,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-06-22 08:08:27,340 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-06-22 08:08:27,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:08:27,341 INFO L225 Difference]: With dead ends: 14 [2020-06-22 08:08:27,341 INFO L226 Difference]: Without dead ends: 13 [2020-06-22 08:08:27,341 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-06-22 08:08:27,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-06-22 08:08:27,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 10. [2020-06-22 08:08:27,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-06-22 08:08:27,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 15 transitions. [2020-06-22 08:08:27,344 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 15 transitions. Word has length 5 [2020-06-22 08:08:27,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:08:27,345 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 15 transitions. [2020-06-22 08:08:27,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-06-22 08:08:27,345 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 15 transitions. [2020-06-22 08:08:27,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-06-22 08:08:27,345 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:08:27,345 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-06-22 08:08:27,346 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONILLEGAL_POINTER_ARITHMETIC]=== [2020-06-22 08:08:27,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:08:27,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1482188220, now seen corresponding path program 1 times [2020-06-22 08:08:27,346 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:08:27,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:08:27,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:08:27,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:08:27,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:08:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:08:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-06-22 08:08:27,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2020-06-22 08:08:27,389 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2020-06-22 08:08:27,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:08:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:08:27,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2020-06-22 08:08:27,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2020-06-22 08:08:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-06-22 08:08:27,482 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-06-22 08:08:27,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-06-22 08:08:27,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-06-22 08:08:27,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-06-22 08:08:27,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-06-22 08:08:27,483 INFO L87 Difference]: Start difference. First operand 10 states and 15 transitions. Second operand 6 states. [2020-06-22 08:08:27,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:08:27,542 INFO L93 Difference]: Finished difference Result 14 states and 20 transitions. [2020-06-22 08:08:27,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-06-22 08:08:27,543 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-06-22 08:08:27,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:08:27,544 INFO L225 Difference]: With dead ends: 14 [2020-06-22 08:08:27,544 INFO L226 Difference]: Without dead ends: 13 [2020-06-22 08:08:27,544 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-06-22 08:08:27,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-06-22 08:08:27,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 10. [2020-06-22 08:08:27,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-06-22 08:08:27,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2020-06-22 08:08:27,547 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 7 [2020-06-22 08:08:27,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:08:27,547 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2020-06-22 08:08:27,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-06-22 08:08:27,548 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2020-06-22 08:08:27,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-06-22 08:08:27,548 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:08:27,548 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-06-22 08:08:27,548 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONILLEGAL_POINTER_ARITHMETIC]=== [2020-06-22 08:08:27,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:08:27,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1482188221, now seen corresponding path program 1 times [2020-06-22 08:08:27,549 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:08:27,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:08:27,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:08:27,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:08:27,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:08:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:08:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-06-22 08:08:27,642 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:08:27,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-06-22 08:08:27,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-06-22 08:08:27,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-06-22 08:08:27,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-06-22 08:08:27,643 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand 6 states. [2020-06-22 08:08:27,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:08:27,736 INFO L93 Difference]: Finished difference Result 21 states and 30 transitions. [2020-06-22 08:08:27,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-06-22 08:08:27,736 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-06-22 08:08:27,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:08:27,737 INFO L225 Difference]: With dead ends: 21 [2020-06-22 08:08:27,737 INFO L226 Difference]: Without dead ends: 16 [2020-06-22 08:08:27,738 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-06-22 08:08:27,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-06-22 08:08:27,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-06-22 08:08:27,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-06-22 08:08:27,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2020-06-22 08:08:27,742 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 7 [2020-06-22 08:08:27,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:08:27,742 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2020-06-22 08:08:27,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-06-22 08:08:27,742 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2020-06-22 08:08:27,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-06-22 08:08:27,743 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:08:27,743 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-06-22 08:08:27,743 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONILLEGAL_POINTER_ARITHMETIC]=== [2020-06-22 08:08:27,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:08:27,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1482186796, now seen corresponding path program 1 times [2020-06-22 08:08:27,744 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:08:27,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:08:27,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:08:27,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:08:27,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:08:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:08:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-06-22 08:08:27,773 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:08:27,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-06-22 08:08:27,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-06-22 08:08:27,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-06-22 08:08:27,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:08:27,775 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 3 states. [2020-06-22 08:08:27,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:08:27,797 INFO L93 Difference]: Finished difference Result 14 states and 19 transitions. [2020-06-22 08:08:27,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-06-22 08:08:27,798 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-06-22 08:08:27,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:08:27,798 INFO L225 Difference]: With dead ends: 14 [2020-06-22 08:08:27,798 INFO L226 Difference]: Without dead ends: 8 [2020-06-22 08:08:27,799 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:08:27,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-06-22 08:08:27,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-06-22 08:08:27,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-06-22 08:08:27,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2020-06-22 08:08:27,801 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 7 [2020-06-22 08:08:27,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:08:27,801 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2020-06-22 08:08:27,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-06-22 08:08:27,802 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2020-06-22 08:08:27,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-06-22 08:08:27,802 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:08:27,802 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-06-22 08:08:27,802 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONILLEGAL_POINTER_ARITHMETIC]=== [2020-06-22 08:08:27,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:08:27,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1768479731, now seen corresponding path program 1 times [2020-06-22 08:08:27,804 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:08:27,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:08:27,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:08:27,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:08:27,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:08:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 08:08:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 08:08:27,850 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2020-06-22 08:08:27,875 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2020-06-22 08:08:27,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 08:08:27 BasicIcfg [2020-06-22 08:08:27,877 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-06-22 08:08:27,878 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-06-22 08:08:27,878 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-06-22 08:08:27,881 INFO L276 PluginConnector]: BuchiAutomizer initialized [2020-06-22 08:08:27,881 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 08:08:27,882 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 08:08:27,882 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 08:08:27,882 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 08:08:27,882 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 08:08:27,882 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-06-22 08:08:27,882 INFO L168 Benchmark]: Toolchain (without parser) took 2132.33 ms. Allocated memory was 649.6 MB in the beginning and 652.7 MB in the end (delta: 3.1 MB). Free memory was 564.1 MB in the beginning and 447.1 MB in the end (delta: 117.1 MB). Peak memory consumption was 120.2 MB. Max. memory is 50.3 GB. [2020-06-22 08:08:27,884 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 649.6 MB. Free memory is still 585.7 MB. There was no memory consumed. Max. memory is 50.3 GB. [2020-06-22 08:08:27,885 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.80 ms. Allocated memory was 649.6 MB in the beginning and 652.7 MB in the end (delta: 3.1 MB). Free memory was 564.1 MB in the beginning and 617.8 MB in the end (delta: -53.6 MB). Peak memory consumption was 30.3 MB. Max. memory is 50.3 GB. [2020-06-22 08:08:27,886 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.66 ms. Allocated memory is still 652.7 MB. Free memory was 617.8 MB in the beginning and 614.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 50.3 GB. [2020-06-22 08:08:27,886 INFO L168 Benchmark]: Boogie Preprocessor took 24.95 ms. Allocated memory is still 652.7 MB. Free memory was 614.7 MB in the beginning and 613.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 50.3 GB. [2020-06-22 08:08:27,887 INFO L168 Benchmark]: RCFGBuilder took 271.84 ms. Allocated memory is still 652.7 MB. Free memory was 613.3 MB in the beginning and 595.0 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 50.3 GB. [2020-06-22 08:08:27,887 INFO L168 Benchmark]: BlockEncodingV2 took 125.20 ms. Allocated memory is still 652.7 MB. Free memory was 595.0 MB in the beginning and 586.9 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 50.3 GB. [2020-06-22 08:08:27,888 INFO L168 Benchmark]: TraceAbstraction took 1367.63 ms. Allocated memory is still 652.7 MB. Free memory was 586.9 MB in the beginning and 447.1 MB in the end (delta: 139.8 MB). Peak memory consumption was 139.8 MB. Max. memory is 50.3 GB. [2020-06-22 08:08:27,889 INFO L168 Benchmark]: BuchiAutomizer took 4.28 ms. Allocated memory is still 652.7 MB. Free memory is still 447.1 MB. There was no memory consumed. Max. memory is 50.3 GB. [2020-06-22 08:08:27,892 INFO L337 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 19 locations, 21 edges - StatisticsResult: Encoded RCFG 12 locations, 20 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 649.6 MB. Free memory is still 585.7 MB. There was no memory consumed. Max. memory is 50.3 GB. * CACSL2BoogieTranslator took 294.80 ms. Allocated memory was 649.6 MB in the beginning and 652.7 MB in the end (delta: 3.1 MB). Free memory was 564.1 MB in the beginning and 617.8 MB in the end (delta: -53.6 MB). Peak memory consumption was 30.3 MB. Max. memory is 50.3 GB. * Boogie Procedure Inliner took 38.66 ms. Allocated memory is still 652.7 MB. Free memory was 617.8 MB in the beginning and 614.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 50.3 GB. * Boogie Preprocessor took 24.95 ms. Allocated memory is still 652.7 MB. Free memory was 614.7 MB in the beginning and 613.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 50.3 GB. * RCFGBuilder took 271.84 ms. Allocated memory is still 652.7 MB. Free memory was 613.3 MB in the beginning and 595.0 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 50.3 GB. * BlockEncodingV2 took 125.20 ms. Allocated memory is still 652.7 MB. Free memory was 595.0 MB in the beginning and 586.9 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 50.3 GB. * TraceAbstraction took 1367.63 ms. Allocated memory is still 652.7 MB. Free memory was 586.9 MB in the beginning and 447.1 MB in the end (delta: 139.8 MB). Peak memory consumption was 139.8 MB. Max. memory is 50.3 GB. * BuchiAutomizer took 4.28 ms. Allocated memory is still 652.7 MB. Free memory is still 447.1 MB. There was no memory consumed. Max. memory is 50.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 28]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L11] int length = __VERIFIER_nondet_int(); [L12] COND FALSE !(length < 1) [L15] char* nondetString = (char*) malloc(length * sizeof(char)); [L16] nondetString[length-1] = '\0' [L17] return nondetString; [L26] const char *p = s; [L28] EXPR \read(*p) [L28] COND TRUE *p != '\0' [L29] p = p+2 [L28] \read(*p) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 5 error locations. UNSAFE Result, 1.3s OverallTime, 10 OverallIterations, 1 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 30 SDtfs, 133 SDslu, 51 SDs, 0 SdLazy, 196 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 62 NumberOfCodeBlocks, 62 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 45 ConstructedInterpolants, 0 QuantifiedInterpolants, 635 SizeOfPredicates, 0 NumberOfNonLiveVariables, 59 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 10 InterpolantComputations, 9 PerfectInterpolantSequences, 2/3 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! !SESSION 2020-06-22 08:08:22.462 ----------------------------------------------- eclipse.buildId=unknown java.version=1.8.0_242 java.vendor=Oracle Corporation BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -tc ./../AutomizerAndBuchiAutomizerCInlineWithBlockEncoding.xml -s ./../termcomp2017.epf -i /export/starexec/sandbox2/benchmark/theBenchmark.c Command-line arguments: -os linux -ws gtk -arch x86_64 -consoleLog -data @user.home/.ultimate -tc ./../AutomizerAndBuchiAutomizerCInlineWithBlockEncoding.xml -s ./../termcomp2017.epf -data /export/starexec/sandbox2/tmp -i /export/starexec/sandbox2/benchmark/theBenchmark.c !ENTRY org.eclipse.core.resources 2 10035 2020-06-22 08:08:28.125 !MESSAGE The workspace will exit with unsaved changes in this session. Received shutdown request... Ultimate: GTK+ Version Check