/export/starexec/sandbox/solver/bin/starexec_run_default /export/starexec/sandbox/benchmark/theBenchmark.c /export/starexec/sandbox/output/output_files -------------------------------------------------------------------------------- MAYBE Ultimate: Cannot open display: This is Ultimate 0.1.25-34f2e62 [2020-07-01 12:27:06,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-01 12:27:06,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-01 12:27:06,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-01 12:27:06,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-01 12:27:06,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-01 12:27:06,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-01 12:27:06,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-01 12:27:06,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-01 12:27:06,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-01 12:27:06,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-01 12:27:06,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-01 12:27:06,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-01 12:27:06,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-01 12:27:06,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-01 12:27:06,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-01 12:27:06,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-01 12:27:06,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-01 12:27:06,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-01 12:27:06,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-01 12:27:06,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-01 12:27:06,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-01 12:27:06,819 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-01 12:27:06,820 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-01 12:27:06,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-01 12:27:06,822 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-01 12:27:06,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-01 12:27:06,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-01 12:27:06,824 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-01 12:27:06,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-01 12:27:06,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-01 12:27:06,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-01 12:27:06,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-01 12:27:06,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-01 12:27:06,828 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-01 12:27:06,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-01 12:27:06,829 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-01 12:27:06,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-01 12:27:06,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-01 12:27:06,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-01 12:27:06,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-01 12:27:06,831 INFO L101 SettingsManager]: Beginning loading settings from /export/starexec/sandbox/solver/bin/./../termcomp2017.epf [2020-07-01 12:27:06,845 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-01 12:27:06,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-01 12:27:06,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-01 12:27:06,847 INFO L138 SettingsManager]: * Rewrite not-equals=true [2020-07-01 12:27:06,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-01 12:27:06,847 INFO L138 SettingsManager]: * Minimize states using LBE with the strategy=SINGLE [2020-07-01 12:27:06,848 INFO L138 SettingsManager]: * Use SBE=true [2020-07-01 12:27:06,848 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-07-01 12:27:06,848 INFO L138 SettingsManager]: * Use old map elimination=false [2020-07-01 12:27:06,848 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-07-01 12:27:06,848 INFO L138 SettingsManager]: * Buchi interpolant automaton construction strategy=DANDELION [2020-07-01 12:27:06,848 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-07-01 12:27:06,849 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-07-01 12:27:06,849 INFO L138 SettingsManager]: * Construct termination proof for TermComp=true [2020-07-01 12:27:06,849 INFO L138 SettingsManager]: * Command for external solver (GNTA synthesis)=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-07-01 12:27:06,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-01 12:27:06,849 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-07-01 12:27:06,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-01 12:27:06,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-01 12:27:06,850 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-07-01 12:27:06,850 INFO L138 SettingsManager]: * How to treat unsigned ints differently from normal ones=IGNORE [2020-07-01 12:27:06,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-01 12:27:06,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-01 12:27:06,851 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-07-01 12:27:06,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 [2020-07-01 12:27:06,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-01 12:27:06,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-01 12:27:06,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-01 12:27:06,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-01 12:27:07,015 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-01 12:27:07,029 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-01 12:27:07,032 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-01 12:27:07,034 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-01 12:27:07,034 INFO L275 PluginConnector]: CDTParser initialized [2020-07-01 12:27:07,035 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /export/starexec/sandbox/benchmark/theBenchmark.c [2020-07-01 12:27:07,098 INFO L220 CDTParser]: Created temporary CDT project at /export/starexec/sandbox/tmp/BenchExec_run_clAOLt/tmp/23efe0408b5142219028c0502adf4236/FLAG8a5ae8f64 [2020-07-01 12:27:07,431 INFO L306 CDTParser]: Found 1 translation units. [2020-07-01 12:27:07,431 INFO L160 CDTParser]: Scanning /export/starexec/sandbox/benchmark/theBenchmark.c [2020-07-01 12:27:07,432 WARN L117 ultiparseSymbolTable]: System include stdlib.h could not be resolved by CDT -- only built-in system includes are available. [2020-07-01 12:27:07,438 INFO L349 CDTParser]: About to delete temporary CDT project at /export/starexec/sandbox/tmp/BenchExec_run_clAOLt/tmp/23efe0408b5142219028c0502adf4236/FLAG8a5ae8f64 [2020-07-01 12:27:07,840 INFO L357 CDTParser]: Successfully deleted /export/starexec/sandbox/tmp/BenchExec_run_clAOLt/tmp/23efe0408b5142219028c0502adf4236 [2020-07-01 12:27:07,851 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-01 12:27:07,853 INFO L131 ToolchainWalker]: Walking toolchain with 7 elements. [2020-07-01 12:27:07,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-01 12:27:07,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-01 12:27:07,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-01 12:27:07,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.07 12:27:07" (1/1) ... [2020-07-01 12:27:07,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bba3da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:27:07, skipping insertion in model container [2020-07-01 12:27:07,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.07 12:27:07" (1/1) ... [2020-07-01 12:27:07,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-01 12:27:07,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-01 12:27:08,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-01 12:27:08,133 INFO L203 MainTranslator]: Completed pre-run [2020-07-01 12:27:08,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-01 12:27:08,169 INFO L208 MainTranslator]: Completed translation [2020-07-01 12:27:08,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:27:08 WrapperNode [2020-07-01 12:27:08,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-01 12:27:08,170 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-07-01 12:27:08,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-07-01 12:27:08,171 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-07-01 12:27:08,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:27:08" (1/1) ... [2020-07-01 12:27:08,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:27:08" (1/1) ... [2020-07-01 12:27:08,213 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-07-01 12:27:08,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-01 12:27:08,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-01 12:27:08,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-01 12:27:08,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:27:08" (1/1) ... [2020-07-01 12:27:08,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:27:08" (1/1) ... [2020-07-01 12:27:08,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:27:08" (1/1) ... [2020-07-01 12:27:08,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:27:08" (1/1) ... [2020-07-01 12:27:08,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:27:08" (1/1) ... [2020-07-01 12:27:08,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:27:08" (1/1) ... [2020-07-01 12:27:08,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:27:08" (1/1) ... [2020-07-01 12:27:08,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-01 12:27:08,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-01 12:27:08,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-01 12:27:08,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-01 12:27:08,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:27:08" (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 [2020-07-01 12:27:08,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-01 12:27:08,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-01 12:27:08,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-01 12:27:08,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-01 12:27:08,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-01 12:27:08,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-01 12:27:08,642 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-01 12:27:08,643 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-01 12:27:08,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 12:27:08 BoogieIcfgContainer [2020-07-01 12:27:08,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-01 12:27:08,648 INFO L113 PluginConnector]: ------------------------BlockEncodingV2---------------------------- [2020-07-01 12:27:08,648 INFO L271 PluginConnector]: Initializing BlockEncodingV2... [2020-07-01 12:27:08,650 INFO L275 PluginConnector]: BlockEncodingV2 initialized [2020-07-01 12:27:08,651 INFO L185 PluginConnector]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 12:27:08" (1/1) ... [2020-07-01 12:27:08,669 INFO L313 BlockEncoder]: Initial Icfg 52 locations, 59 edges [2020-07-01 12:27:08,671 INFO L258 BlockEncoder]: Using Remove infeasible edges [2020-07-01 12:27:08,672 INFO L263 BlockEncoder]: Using Maximize final states [2020-07-01 12:27:08,672 INFO L270 BlockEncoder]: Using Minimize states even if more edges are added than removed.=false [2020-07-01 12:27:08,673 INFO L276 BlockEncoder]: Using Minimize states using LBE with the strategy=SINGLE [2020-07-01 12:27:08,675 INFO L296 BlockEncoder]: Using Remove sink states [2020-07-01 12:27:08,676 INFO L171 BlockEncoder]: Using Apply optimizations until nothing changes=true [2020-07-01 12:27:08,676 INFO L179 BlockEncoder]: Using Rewrite not-equals [2020-07-01 12:27:08,711 INFO L185 BlockEncoder]: Using Use SBE [2020-07-01 12:27:08,768 INFO L200 BlockEncoder]: SBE split 27 edges [2020-07-01 12:27:08,774 INFO L70 emoveInfeasibleEdges]: Removed 2 edges and 0 locations because of local infeasibility [2020-07-01 12:27:08,776 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-07-01 12:27:08,812 INFO L100 BaseMinimizeStates]: Removed 18 edges and 9 locations by large block encoding [2020-07-01 12:27:08,815 INFO L70 RemoveSinkStates]: Removed 1 edges and 1 locations by removing sink states [2020-07-01 12:27:08,817 INFO L70 emoveInfeasibleEdges]: Removed 0 edges and 0 locations because of local infeasibility [2020-07-01 12:27:08,818 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-07-01 12:27:08,818 INFO L100 BaseMinimizeStates]: Removed 0 edges and 0 locations by large block encoding [2020-07-01 12:27:08,818 INFO L70 RemoveSinkStates]: Removed 0 edges and 0 locations by removing sink states [2020-07-01 12:27:08,819 INFO L313 BlockEncoder]: Encoded RCFG 42 locations, 149 edges [2020-07-01 12:27:08,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 01.07 12:27:08 BasicIcfg [2020-07-01 12:27:08,820 INFO L132 PluginConnector]: ------------------------ END BlockEncodingV2---------------------------- [2020-07-01 12:27:08,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-01 12:27:08,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-01 12:27:08,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-01 12:27:08,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.07 12:27:07" (1/4) ... [2020-07-01 12:27:08,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@440c641d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.07 12:27:08, skipping insertion in model container [2020-07-01 12:27:08,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:27:08" (2/4) ... [2020-07-01 12:27:08,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@440c641d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.07 12:27:08, skipping insertion in model container [2020-07-01 12:27:08,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 12:27:08" (3/4) ... [2020-07-01 12:27:08,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@440c641d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.07 12:27:08, skipping insertion in model container [2020-07-01 12:27:08,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 01.07 12:27:08" (4/4) ... [2020-07-01 12:27:08,828 INFO L109 eAbstractionObserver]: Analyzing ICFG theBenchmark.c_BEv2 [2020-07-01 12:27:08,839 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2020-07-01 12:27:08,847 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 20 error locations. [2020-07-01 12:27:08,860 INFO L251 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2020-07-01 12:27:08,884 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-01 12:27:08,885 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-01 12:27:08,885 INFO L377 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2020-07-01 12:27:08,885 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-01 12:27:08,885 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-01 12:27:08,885 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-01 12:27:08,885 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-01 12:27:08,885 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-01 12:27:08,901 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-07-01 12:27:08,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-07-01 12:27:08,908 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:27:08,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-07-01 12:27:08,909 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:27:08,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:27:08,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1297657221, now seen corresponding path program 1 times [2020-07-01 12:27:08,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:27:08,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308020218] [2020-07-01 12:27:08,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:27:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:27:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 12:27:09,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308020218] [2020-07-01 12:27:09,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:27:09,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 12:27:09,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528317741] [2020-07-01 12:27:09,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-01 12:27:09,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:27:09,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-01 12:27:09,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-01 12:27:09,089 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 2 states. [2020-07-01 12:27:09,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:27:09,375 INFO L93 Difference]: Finished difference Result 81 states and 276 transitions. [2020-07-01 12:27:09,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-01 12:27:09,394 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-07-01 12:27:09,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:27:09,407 INFO L225 Difference]: With dead ends: 81 [2020-07-01 12:27:09,407 INFO L226 Difference]: Without dead ends: 42 [2020-07-01 12:27:09,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-01 12:27:09,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-01 12:27:09,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-01 12:27:09,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-01 12:27:09,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 84 transitions. [2020-07-01 12:27:09,451 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 84 transitions. Word has length 6 [2020-07-01 12:27:09,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:27:09,452 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 84 transitions. [2020-07-01 12:27:09,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-01 12:27:09,452 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 84 transitions. [2020-07-01 12:27:09,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-07-01 12:27:09,453 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:27:09,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-07-01 12:27:09,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-01 12:27:09,455 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:27:09,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:27:09,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1297835967, now seen corresponding path program 1 times [2020-07-01 12:27:09,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:27:09,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853735274] [2020-07-01 12:27:09,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:27:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:27:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 12:27:09,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853735274] [2020-07-01 12:27:09,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:27:09,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 12:27:09,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367616978] [2020-07-01 12:27:09,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 12:27:09,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:27:09,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 12:27:09,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:27:09,492 INFO L87 Difference]: Start difference. First operand 42 states and 84 transitions. Second operand 3 states. [2020-07-01 12:27:09,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:27:09,597 INFO L93 Difference]: Finished difference Result 80 states and 159 transitions. [2020-07-01 12:27:09,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 12:27:09,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-07-01 12:27:09,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:27:09,599 INFO L225 Difference]: With dead ends: 80 [2020-07-01 12:27:09,599 INFO L226 Difference]: Without dead ends: 42 [2020-07-01 12:27:09,600 INFO L675 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 [2020-07-01 12:27:09,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-01 12:27:09,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-01 12:27:09,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-01 12:27:09,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 83 transitions. [2020-07-01 12:27:09,606 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 83 transitions. Word has length 6 [2020-07-01 12:27:09,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:27:09,606 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 83 transitions. [2020-07-01 12:27:09,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 12:27:09,606 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 83 transitions. [2020-07-01 12:27:09,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-07-01 12:27:09,607 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:27:09,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-07-01 12:27:09,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-01 12:27:09,608 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:27:09,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:27:09,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1297836928, now seen corresponding path program 1 times [2020-07-01 12:27:09,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:27:09,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373598360] [2020-07-01 12:27:09,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:27:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:27:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 12:27:09,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373598360] [2020-07-01 12:27:09,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:27:09,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 12:27:09,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693325682] [2020-07-01 12:27:09,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 12:27:09,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:27:09,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 12:27:09,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:27:09,651 INFO L87 Difference]: Start difference. First operand 42 states and 83 transitions. Second operand 3 states. [2020-07-01 12:27:09,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:27:09,819 INFO L93 Difference]: Finished difference Result 42 states and 83 transitions. [2020-07-01 12:27:09,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 12:27:09,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-07-01 12:27:09,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:27:09,821 INFO L225 Difference]: With dead ends: 42 [2020-07-01 12:27:09,821 INFO L226 Difference]: Without dead ends: 38 [2020-07-01 12:27:09,821 INFO L675 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 [2020-07-01 12:27:09,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-01 12:27:09,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-07-01 12:27:09,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-01 12:27:09,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 75 transitions. [2020-07-01 12:27:09,827 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 75 transitions. Word has length 6 [2020-07-01 12:27:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:27:09,827 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 75 transitions. [2020-07-01 12:27:09,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 12:27:09,827 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 75 transitions. [2020-07-01 12:27:09,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-07-01 12:27:09,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:27:09,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-07-01 12:27:09,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-01 12:27:09,828 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:27:09,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:27:09,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1297836930, now seen corresponding path program 1 times [2020-07-01 12:27:09,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:27:09,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926576344] [2020-07-01 12:27:09,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:27:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:27:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 12:27:09,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926576344] [2020-07-01 12:27:09,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:27:09,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 12:27:09,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806323798] [2020-07-01 12:27:09,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 12:27:09,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:27:09,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 12:27:09,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:27:09,870 INFO L87 Difference]: Start difference. First operand 38 states and 75 transitions. Second operand 3 states. [2020-07-01 12:27:10,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:27:10,073 INFO L93 Difference]: Finished difference Result 76 states and 142 transitions. [2020-07-01 12:27:10,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 12:27:10,074 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-07-01 12:27:10,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:27:10,075 INFO L225 Difference]: With dead ends: 76 [2020-07-01 12:27:10,075 INFO L226 Difference]: Without dead ends: 72 [2020-07-01 12:27:10,076 INFO L675 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 [2020-07-01 12:27:10,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-01 12:27:10,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 44. [2020-07-01 12:27:10,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-01 12:27:10,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 97 transitions. [2020-07-01 12:27:10,083 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 97 transitions. Word has length 6 [2020-07-01 12:27:10,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:27:10,083 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 97 transitions. [2020-07-01 12:27:10,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 12:27:10,083 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 97 transitions. [2020-07-01 12:27:10,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-07-01 12:27:10,084 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:27:10,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-07-01 12:27:10,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-01 12:27:10,084 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:27:10,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:27:10,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1297836931, now seen corresponding path program 1 times [2020-07-01 12:27:10,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:27:10,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768878792] [2020-07-01 12:27:10,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:27:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-01 12:27:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-01 12:27:10,131 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-01 12:27:10,131 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-01 12:27:10,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-01 12:27:10,150 INFO L308 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2020-07-01 12:27:10,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.07 12:27:10 BasicIcfg [2020-07-01 12:27:10,153 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-01 12:27:10,153 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-07-01 12:27:10,154 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-07-01 12:27:10,157 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-07-01 12:27:10,157 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:27:10,157 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:27:10,157 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:27:10,158 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:27:10,158 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:27:10,158 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-07-01 12:27:10,160 INFO L168 Benchmark]: Toolchain (without parser) took 2306.64 ms. Allocated memory was 514.9 MB in the beginning and 582.0 MB in the end (delta: 67.1 MB). Free memory was 438.5 MB in the beginning and 488.4 MB in the end (delta: -49.9 MB). Peak memory consumption was 17.2 MB. Max. memory is 50.3 GB. [2020-07-01 12:27:10,161 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 514.9 MB. Free memory is still 458.5 MB. There was no memory consumed. Max. memory is 50.3 GB. [2020-07-01 12:27:10,162 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.10 ms. Allocated memory was 514.9 MB in the beginning and 556.3 MB in the end (delta: 41.4 MB). Free memory was 438.5 MB in the beginning and 522.3 MB in the end (delta: -83.9 MB). Peak memory consumption was 28.9 MB. Max. memory is 50.3 GB. [2020-07-01 12:27:10,162 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.05 ms. Allocated memory is still 556.3 MB. Free memory was 522.3 MB in the beginning and 520.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 50.3 GB. [2020-07-01 12:27:10,163 INFO L168 Benchmark]: Boogie Preprocessor took 28.69 ms. Allocated memory is still 556.3 MB. Free memory was 520.3 MB in the beginning and 518.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 50.3 GB. [2020-07-01 12:27:10,163 INFO L168 Benchmark]: RCFGBuilder took 404.57 ms. Allocated memory is still 556.3 MB. Free memory was 518.3 MB in the beginning and 493.8 MB in the end (delta: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 50.3 GB. [2020-07-01 12:27:10,164 INFO L168 Benchmark]: BlockEncodingV2 took 171.96 ms. Allocated memory is still 556.3 MB. Free memory was 493.8 MB in the beginning and 478.3 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 50.3 GB. [2020-07-01 12:27:10,165 INFO L168 Benchmark]: TraceAbstraction took 1332.03 ms. Allocated memory was 556.3 MB in the beginning and 582.0 MB in the end (delta: 25.7 MB). Free memory was 477.6 MB in the beginning and 490.4 MB in the end (delta: -12.7 MB). Peak memory consumption was 13.0 MB. Max. memory is 50.3 GB. [2020-07-01 12:27:10,165 INFO L168 Benchmark]: BuchiAutomizer took 4.38 ms. Allocated memory is still 582.0 MB. Free memory was 490.4 MB in the beginning and 488.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 50.3 GB. [2020-07-01 12:27:10,169 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 52 locations, 59 edges - StatisticsResult: Encoded RCFG 42 locations, 149 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 514.9 MB. Free memory is still 458.5 MB. There was no memory consumed. Max. memory is 50.3 GB. * CACSL2BoogieTranslator took 316.10 ms. Allocated memory was 514.9 MB in the beginning and 556.3 MB in the end (delta: 41.4 MB). Free memory was 438.5 MB in the beginning and 522.3 MB in the end (delta: -83.9 MB). Peak memory consumption was 28.9 MB. Max. memory is 50.3 GB. * Boogie Procedure Inliner took 43.05 ms. Allocated memory is still 556.3 MB. Free memory was 522.3 MB in the beginning and 520.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 50.3 GB. * Boogie Preprocessor took 28.69 ms. Allocated memory is still 556.3 MB. Free memory was 520.3 MB in the beginning and 518.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 50.3 GB. * RCFGBuilder took 404.57 ms. Allocated memory is still 556.3 MB. Free memory was 518.3 MB in the beginning and 493.8 MB in the end (delta: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 50.3 GB. * BlockEncodingV2 took 171.96 ms. Allocated memory is still 556.3 MB. Free memory was 493.8 MB in the beginning and 478.3 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 50.3 GB. * TraceAbstraction took 1332.03 ms. Allocated memory was 556.3 MB in the beginning and 582.0 MB in the end (delta: 25.7 MB). Free memory was 477.6 MB in the beginning and 490.4 MB in the end (delta: -12.7 MB). Peak memory consumption was 13.0 MB. Max. memory is 50.3 GB. * BuchiAutomizer took 4.38 ms. Allocated memory is still 582.0 MB. Free memory was 490.4 MB in the beginning and 488.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 50.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L5] int i, j, tmp; [L6] int length = __VERIFIER_nondet_int(); [L7] COND TRUE length < 1 [L7] length = 1 [L9] COND FALSE !(length % 2 == 0) [L10] int *arr = alloca(length); [L12] i=0 [L12] COND TRUE i