MAYBE Ultimate: Cannot open display: This is Ultimate 0.1.24-8dc7c08-m [2020-06-22 10:50:25,436 INFO L170 SettingsManager]: Resetting all preferences to default values... [2020-06-22 10:50:25,438 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2020-06-22 10:50:25,449 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-06-22 10:50:25,449 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-06-22 10:50:25,450 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-06-22 10:50:25,451 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-06-22 10:50:25,453 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2020-06-22 10:50:25,454 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-06-22 10:50:25,455 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-06-22 10:50:25,456 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-06-22 10:50:25,456 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-06-22 10:50:25,457 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-06-22 10:50:25,458 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-06-22 10:50:25,459 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-06-22 10:50:25,460 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-06-22 10:50:25,460 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-06-22 10:50:25,462 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-06-22 10:50:25,464 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2020-06-22 10:50:25,466 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-06-22 10:50:25,467 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-06-22 10:50:25,468 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-06-22 10:50:25,470 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-06-22 10:50:25,470 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-06-22 10:50:25,470 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-06-22 10:50:25,471 INFO L174 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-06-22 10:50:25,471 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-06-22 10:50:25,472 INFO L177 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-06-22 10:50:25,472 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-06-22 10:50:25,473 INFO L174 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-06-22 10:50:25,474 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-06-22 10:50:25,474 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2020-06-22 10:50:25,475 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-06-22 10:50:25,476 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2020-06-22 10:50:25,476 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-06-22 10:50:25,476 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-06-22 10:50:25,476 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2020-06-22 10:50:25,477 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2020-06-22 10:50:25,478 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2020-06-22 10:50:25,478 INFO L98 SettingsManager]: Beginning loading settings from /export/starexec/sandbox/solver/bin/./../termcomp2017.epf [2020-06-22 10:50:25,492 INFO L110 SettingsManager]: Loading preferences was successful [2020-06-22 10:50:25,493 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2020-06-22 10:50:25,494 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-06-22 10:50:25,494 INFO L133 SettingsManager]: * Rewrite not-equals=true [2020-06-22 10:50:25,494 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2020-06-22 10:50:25,494 INFO L133 SettingsManager]: * Minimize states using LBE with the strategy=SINGLE [2020-06-22 10:50:25,495 INFO L133 SettingsManager]: * Use SBE=true [2020-06-22 10:50:25,495 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-06-22 10:50:25,495 INFO L133 SettingsManager]: * Use old map elimination=false [2020-06-22 10:50:25,495 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2020-06-22 10:50:25,495 INFO L133 SettingsManager]: * Buchi interpolant automaton construction strategy=DANDELION [2020-06-22 10:50:25,495 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2020-06-22 10:50:25,496 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-06-22 10:50:25,496 INFO L133 SettingsManager]: * Construct termination proof for TermComp=true [2020-06-22 10:50:25,496 INFO L133 SettingsManager]: * Command for external solver (GNTA synthesis)=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 10:50:25,496 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-06-22 10:50:25,496 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-06-22 10:50:25,497 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2020-06-22 10:50:25,497 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2020-06-22 10:50:25,497 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-06-22 10:50:25,497 INFO L133 SettingsManager]: * How to treat unsigned ints differently from normal ones=IGNORE [2020-06-22 10:50:25,497 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-06-22 10:50:25,498 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-06-22 10:50:25,498 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-06-22 10:50:25,498 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 [2020-06-22 10:50:25,498 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-06-22 10:50:25,498 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-06-22 10:50:25,498 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2020-06-22 10:50:25,499 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-06-22 10:50:25,524 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-06-22 10:50:25,537 INFO L259 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-06-22 10:50:25,541 INFO L215 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-06-22 10:50:25,542 INFO L271 PluginConnector]: Initializing CDTParser... [2020-06-22 10:50:25,543 INFO L276 PluginConnector]: CDTParser initialized [2020-06-22 10:50:25,543 INFO L430 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /export/starexec/sandbox/benchmark/theBenchmark.c [2020-06-22 10:50:25,614 INFO L221 CDTParser]: Created temporary CDT project at /export/starexec/sandbox/tmp/4602d773669247e2b376691fafac0d43/FLAG6bb4582e6 [2020-06-22 10:50:25,958 INFO L307 CDTParser]: Found 1 translation units. [2020-06-22 10:50:25,959 INFO L161 CDTParser]: Scanning /export/starexec/sandbox/benchmark/theBenchmark.c [2020-06-22 10:50:25,959 WARN L117 ultiparseSymbolTable]: System include stdlib.h could not be resolved by CDT -- only built-in system includes are available. [2020-06-22 10:50:25,966 INFO L355 CDTParser]: About to delete temporary CDT project at /export/starexec/sandbox/tmp/4602d773669247e2b376691fafac0d43/FLAG6bb4582e6 [2020-06-22 10:50:26,362 INFO L363 CDTParser]: Successfully deleted /export/starexec/sandbox/tmp/4602d773669247e2b376691fafac0d43 [2020-06-22 10:50:26,373 INFO L297 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-06-22 10:50:26,375 INFO L131 ToolchainWalker]: Walking toolchain with 7 elements. [2020-06-22 10:50:26,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-06-22 10:50:26,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-06-22 10:50:26,379 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2020-06-22 10:50:26,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.06 10:50:26" (1/1) ... [2020-06-22 10:50:26,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76676038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 10:50:26, skipping insertion in model container [2020-06-22 10:50:26,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.06 10:50:26" (1/1) ... [2020-06-22 10:50:26,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-06-22 10:50:26,409 INFO L176 MainTranslator]: Built tables and reachable declarations [2020-06-22 10:50:26,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-06-22 10:50:26,636 INFO L191 MainTranslator]: Completed pre-run [2020-06-22 10:50:26,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-06-22 10:50:26,671 INFO L195 MainTranslator]: Completed translation [2020-06-22 10:50:26,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 10:50:26 WrapperNode [2020-06-22 10:50:26,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-06-22 10:50:26,672 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-06-22 10:50:26,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-06-22 10:50:26,672 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2020-06-22 10:50:26,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 10:50:26" (1/1) ... [2020-06-22 10:50:26,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 10:50:26" (1/1) ... [2020-06-22 10:50:26,715 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-06-22 10:50:26,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-06-22 10:50:26,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-06-22 10:50:26,715 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2020-06-22 10:50:26,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 10:50:26" (1/1) ... [2020-06-22 10:50:26,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 10:50:26" (1/1) ... [2020-06-22 10:50:26,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 10:50:26" (1/1) ... [2020-06-22 10:50:26,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 10:50:26" (1/1) ... [2020-06-22 10:50:26,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 10:50:26" (1/1) ... [2020-06-22 10:50:26,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 10:50:26" (1/1) ... [2020-06-22 10:50:26,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 10:50:26" (1/1) ... [2020-06-22 10:50:26,739 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-06-22 10:50:26,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-06-22 10:50:26,740 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-06-22 10:50:26,740 INFO L276 PluginConnector]: RCFGBuilder initialized [2020-06-22 10:50:26,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 10:50:26" (1/1) ... No working directory specified, using /export/starexec/sandbox/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 10:50:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-06-22 10:50:26,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-06-22 10:50:26,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-06-22 10:50:26,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-06-22 10:50:26,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-06-22 10:50:27,012 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-06-22 10:50:27,012 INFO L286 CfgBuilder]: Removed 7 assue(true) statements. [2020-06-22 10:50:27,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 10:50:27 BoogieIcfgContainer [2020-06-22 10:50:27,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-06-22 10:50:27,014 INFO L113 PluginConnector]: ------------------------BlockEncodingV2---------------------------- [2020-06-22 10:50:27,015 INFO L271 PluginConnector]: Initializing BlockEncodingV2... [2020-06-22 10:50:27,017 INFO L276 PluginConnector]: BlockEncodingV2 initialized [2020-06-22 10:50:27,017 INFO L185 PluginConnector]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 10:50:27" (1/1) ... [2020-06-22 10:50:27,033 INFO L313 BlockEncoder]: Initial Icfg 18 locations, 23 edges [2020-06-22 10:50:27,035 INFO L258 BlockEncoder]: Using Remove infeasible edges [2020-06-22 10:50:27,035 INFO L263 BlockEncoder]: Using Maximize final states [2020-06-22 10:50:27,036 INFO L270 BlockEncoder]: Using Minimize states even if more edges are added than removed.=false [2020-06-22 10:50:27,036 INFO L276 BlockEncoder]: Using Minimize states using LBE with the strategy=SINGLE [2020-06-22 10:50:27,039 INFO L296 BlockEncoder]: Using Remove sink states [2020-06-22 10:50:27,041 INFO L171 BlockEncoder]: Using Apply optimizations until nothing changes=true [2020-06-22 10:50:27,041 INFO L179 BlockEncoder]: Using Rewrite not-equals [2020-06-22 10:50:27,060 INFO L185 BlockEncoder]: Using Use SBE [2020-06-22 10:50:27,083 INFO L200 BlockEncoder]: SBE split 6 edges [2020-06-22 10:50:27,088 INFO L70 emoveInfeasibleEdges]: Removed 1 edges and 0 locations because of local infeasibility [2020-06-22 10:50:27,090 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-06-22 10:50:27,124 INFO L100 BaseMinimizeStates]: Removed 6 edges and 3 locations by large block encoding [2020-06-22 10:50:27,126 INFO L70 RemoveSinkStates]: Removed 5 edges and 3 locations by removing sink states [2020-06-22 10:50:27,128 INFO L70 emoveInfeasibleEdges]: Removed 0 edges and 0 locations because of local infeasibility [2020-06-22 10:50:27,128 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-06-22 10:50:27,128 INFO L100 BaseMinimizeStates]: Removed 0 edges and 0 locations by large block encoding [2020-06-22 10:50:27,129 INFO L70 RemoveSinkStates]: Removed 0 edges and 0 locations by removing sink states [2020-06-22 10:50:27,129 INFO L313 BlockEncoder]: Encoded RCFG 12 locations, 20 edges [2020-06-22 10:50:27,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 22.06 10:50:27 BasicIcfg [2020-06-22 10:50:27,130 INFO L132 PluginConnector]: ------------------------ END BlockEncodingV2---------------------------- [2020-06-22 10:50:27,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-06-22 10:50:27,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-06-22 10:50:27,135 INFO L276 PluginConnector]: TraceAbstraction initialized [2020-06-22 10:50:27,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.06 10:50:26" (1/4) ... [2020-06-22 10:50:27,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db2e39d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 10:50:27, skipping insertion in model container [2020-06-22 10:50:27,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 10:50:26" (2/4) ... [2020-06-22 10:50:27,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db2e39d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 10:50:27, skipping insertion in model container [2020-06-22 10:50:27,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 10:50:27" (3/4) ... [2020-06-22 10:50:27,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db2e39d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 10:50:27, skipping insertion in model container [2020-06-22 10:50:27,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 22.06 10:50:27" (4/4) ... [2020-06-22 10:50:27,139 INFO L112 eAbstractionObserver]: Analyzing ICFG theBenchmark.c_BEv2 [2020-06-22 10:50:27,149 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2020-06-22 10:50:27,157 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-06-22 10:50:27,175 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-06-22 10:50:27,205 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2020-06-22 10:50:27,206 INFO L382 AbstractCegarLoop]: Interprodecural is true [2020-06-22 10:50:27,206 INFO L383 AbstractCegarLoop]: Hoare is true [2020-06-22 10:50:27,206 INFO L384 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2020-06-22 10:50:27,206 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-06-22 10:50:27,206 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-06-22 10:50:27,207 INFO L387 AbstractCegarLoop]: Difference is false [2020-06-22 10:50:27,207 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-06-22 10:50:27,207 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-06-22 10:50:27,222 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-06-22 10:50:27,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-06-22 10:50:27,229 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 10:50:27,230 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-06-22 10:50:27,230 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION]=== [2020-06-22 10:50:27,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 10:50:27,236 INFO L82 PathProgramCache]: Analyzing trace with hash 520829245, now seen corresponding path program 1 times [2020-06-22 10:50:27,238 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 10:50:27,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 10:50:27,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 10:50:27,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 10:50:27,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 10:50:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 10:50:27,436 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 10:50:27,438 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 10:50:27,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-06-22 10:50:27,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-06-22 10:50:27,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-06-22 10:50:27,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-06-22 10:50:27,459 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 5 states. [2020-06-22 10:50:27,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 10:50:27,576 INFO L93 Difference]: Finished difference Result 12 states and 20 transitions. [2020-06-22 10:50:27,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-06-22 10:50:27,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-06-22 10:50:27,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 10:50:27,591 INFO L225 Difference]: With dead ends: 12 [2020-06-22 10:50:27,591 INFO L226 Difference]: Without dead ends: 11 [2020-06-22 10:50:27,595 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-06-22 10:50:27,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-06-22 10:50:27,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-06-22 10:50:27,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-06-22 10:50:27,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 18 transitions. [2020-06-22 10:50:27,630 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 18 transitions. Word has length 7 [2020-06-22 10:50:27,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 10:50:27,630 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 18 transitions. [2020-06-22 10:50:27,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-06-22 10:50:27,630 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 18 transitions. [2020-06-22 10:50:27,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-06-22 10:50:27,631 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 10:50:27,631 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-06-22 10:50:27,631 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION]=== [2020-06-22 10:50:27,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 10:50:27,632 INFO L82 PathProgramCache]: Analyzing trace with hash 520829247, now seen corresponding path program 1 times [2020-06-22 10:50:27,632 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 10:50:27,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 10:50:27,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 10:50:27,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 10:50:27,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 10:50:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 10:50:27,755 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 10:50:27,755 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 10:50:27,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-06-22 10:50:27,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-06-22 10:50:27,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-06-22 10:50:27,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-06-22 10:50:27,758 INFO L87 Difference]: Start difference. First operand 11 states and 18 transitions. Second operand 6 states. [2020-06-22 10:50:27,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 10:50:27,915 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2020-06-22 10:50:27,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-06-22 10:50:27,915 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-06-22 10:50:27,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 10:50:27,916 INFO L225 Difference]: With dead ends: 22 [2020-06-22 10:50:27,916 INFO L226 Difference]: Without dead ends: 16 [2020-06-22 10:50:27,918 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-06-22 10:50:27,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-06-22 10:50:27,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2020-06-22 10:50:27,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-06-22 10:50:27,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 16 transitions. [2020-06-22 10:50:27,921 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 16 transitions. Word has length 7 [2020-06-22 10:50:27,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 10:50:27,921 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 16 transitions. [2020-06-22 10:50:27,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-06-22 10:50:27,922 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 16 transitions. [2020-06-22 10:50:27,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-06-22 10:50:27,922 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 10:50:27,922 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-06-22 10:50:27,922 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION]=== [2020-06-22 10:50:27,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 10:50:27,923 INFO L82 PathProgramCache]: Analyzing trace with hash 520829248, now seen corresponding path program 1 times [2020-06-22 10:50:27,923 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 10:50:27,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 10:50:27,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 10:50:27,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 10:50:27,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 10:50:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 10:50:28,010 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 10:50:28,010 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 10:50:28,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-06-22 10:50:28,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-06-22 10:50:28,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-06-22 10:50:28,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-06-22 10:50:28,012 INFO L87 Difference]: Start difference. First operand 11 states and 16 transitions. Second operand 6 states. [2020-06-22 10:50:28,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 10:50:28,125 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2020-06-22 10:50:28,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-06-22 10:50:28,125 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-06-22 10:50:28,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 10:50:28,126 INFO L225 Difference]: With dead ends: 22 [2020-06-22 10:50:28,126 INFO L226 Difference]: Without dead ends: 21 [2020-06-22 10:50:28,127 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-06-22 10:50:28,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-06-22 10:50:28,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-06-22 10:50:28,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-06-22 10:50:28,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 21 transitions. [2020-06-22 10:50:28,132 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 21 transitions. Word has length 7 [2020-06-22 10:50:28,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 10:50:28,132 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 21 transitions. [2020-06-22 10:50:28,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-06-22 10:50:28,133 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 21 transitions. [2020-06-22 10:50:28,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-06-22 10:50:28,133 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 10:50:28,133 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-06-22 10:50:28,134 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION]=== [2020-06-22 10:50:28,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 10:50:28,134 INFO L82 PathProgramCache]: Analyzing trace with hash 542070231, now seen corresponding path program 1 times [2020-06-22 10:50:28,134 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 10:50:28,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 10:50:28,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 10:50:28,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 10:50:28,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 10:50:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 10:50:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 10:50:28,183 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2020-06-22 10:50:28,206 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2020-06-22 10:50:28,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 10:50:28 BasicIcfg [2020-06-22 10:50:28,209 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-06-22 10:50:28,210 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-06-22 10:50:28,210 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-06-22 10:50:28,213 INFO L276 PluginConnector]: BuchiAutomizer initialized [2020-06-22 10:50:28,214 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 10:50:28,214 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 10:50:28,214 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 10:50:28,214 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 10:50:28,214 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 10:50:28,214 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-06-22 10:50:28,215 INFO L168 Benchmark]: Toolchain (without parser) took 1841.09 ms. Allocated memory was 649.6 MB in the beginning and 687.9 MB in the end (delta: 38.3 MB). Free memory was 564.2 MB in the beginning and 526.2 MB in the end (delta: 38.0 MB). Peak memory consumption was 76.3 MB. Max. memory is 50.3 GB. [2020-06-22 10:50:28,217 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 649.6 MB. Free memory is still 585.8 MB. There was no memory consumed. Max. memory is 50.3 GB. [2020-06-22 10:50:28,217 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.06 ms. Allocated memory was 649.6 MB in the beginning and 687.9 MB in the end (delta: 38.3 MB). Free memory was 564.2 MB in the beginning and 651.8 MB in the end (delta: -87.7 MB). Peak memory consumption was 29.3 MB. Max. memory is 50.3 GB. [2020-06-22 10:50:28,218 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.63 ms. Allocated memory is still 687.9 MB. Free memory was 650.8 MB in the beginning and 649.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 50.3 GB. [2020-06-22 10:50:28,219 INFO L168 Benchmark]: Boogie Preprocessor took 24.19 ms. Allocated memory is still 687.9 MB. Free memory was 649.7 MB in the beginning and 647.5 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 50.3 GB. [2020-06-22 10:50:28,219 INFO L168 Benchmark]: RCFGBuilder took 274.51 ms. Allocated memory is still 687.9 MB. Free memory was 647.5 MB in the beginning and 629.7 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 50.3 GB. [2020-06-22 10:50:28,220 INFO L168 Benchmark]: BlockEncodingV2 took 115.78 ms. Allocated memory is still 687.9 MB. Free memory was 629.7 MB in the beginning and 623.3 MB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 50.3 GB. [2020-06-22 10:50:28,220 INFO L168 Benchmark]: TraceAbstraction took 1077.74 ms. Allocated memory is still 687.9 MB. Free memory was 623.3 MB in the beginning and 527.3 MB in the end (delta: 96.0 MB). Peak memory consumption was 96.0 MB. Max. memory is 50.3 GB. [2020-06-22 10:50:28,221 INFO L168 Benchmark]: BuchiAutomizer took 4.67 ms. Allocated memory is still 687.9 MB. Free memory was 527.3 MB in the beginning and 526.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 50.3 GB. [2020-06-22 10:50:28,225 INFO L337 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 18 locations, 23 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 585.8 MB. There was no memory consumed. Max. memory is 50.3 GB. * CACSL2BoogieTranslator took 296.06 ms. Allocated memory was 649.6 MB in the beginning and 687.9 MB in the end (delta: 38.3 MB). Free memory was 564.2 MB in the beginning and 651.8 MB in the end (delta: -87.7 MB). Peak memory consumption was 29.3 MB. Max. memory is 50.3 GB. * Boogie Procedure Inliner took 42.63 ms. Allocated memory is still 687.9 MB. Free memory was 650.8 MB in the beginning and 649.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 50.3 GB. * Boogie Preprocessor took 24.19 ms. Allocated memory is still 687.9 MB. Free memory was 649.7 MB in the beginning and 647.5 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 50.3 GB. * RCFGBuilder took 274.51 ms. Allocated memory is still 687.9 MB. Free memory was 647.5 MB in the beginning and 629.7 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 50.3 GB. * BlockEncodingV2 took 115.78 ms. Allocated memory is still 687.9 MB. Free memory was 629.7 MB in the beginning and 623.3 MB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 50.3 GB. * TraceAbstraction took 1077.74 ms. Allocated memory is still 687.9 MB. Free memory was 623.3 MB in the beginning and 527.3 MB in the end (delta: 96.0 MB). Peak memory consumption was 96.0 MB. Max. memory is 50.3 GB. * BuchiAutomizer took 4.67 ms. Allocated memory is still 687.9 MB. Free memory was 527.3 MB in the beginning and 526.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 50.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L25] int length = __VERIFIER_nondet_int(); [L26] int n = __VERIFIER_nondet_int(); [L27] int c = __VERIFIER_nondet_int(); [L28] COND FALSE !(length < 1) [L31] COND FALSE !(n < 1) [L34] char* nondetArea = (char*) alloca(n * sizeof(char)); [L12] const unsigned char *cp; [L14] COND TRUE n != 0 [L15] cp = (unsigned char *)s + n [L17] --cp - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 2 error locations. UNSAFE Result, 1.0s OverallTime, 4 OverallIterations, 1 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 10 SDtfs, 76 SDslu, 79 SDs, 0 SdLazy, 136 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=3, 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, 3 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 426 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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 10:50:23.119 ----------------------------------------------- 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/sandbox/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/sandbox/tmp -i /export/starexec/sandbox/benchmark/theBenchmark.c !ENTRY org.eclipse.core.resources 2 10035 2020-06-22 10:50:28.460 !MESSAGE The workspace will exit with unsaved changes in this session. Received shutdown request... Ultimate: GTK+ Version Check