/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/stateful_check.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:56:37,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:56:37,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:56:37,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 21:56:37,502 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 21:56:37,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 21:56:37,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 21:56:37,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 21:56:37,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 21:56:37,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 21:56:37,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 21:56:37,510 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 21:56:37,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:56:37,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:56:37,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:56:37,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:56:37,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:56:37,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:56:37,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:56:37,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:56:37,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:56:37,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:56:37,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:56:37,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:56:37,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 21:56:37,541 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 21:56:37,554 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:56:37,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:56:37,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:56:37,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:56:37,556 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:56:37,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:56:37,556 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:56:37,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:56:37,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:56:37,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:56:37,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:56:37,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:56:37,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:56:37,557 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:56:37,558 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:56:37,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:56:37,558 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:56:37,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:56:37,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:56:37,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:56:37,559 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:56:37,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:56:37,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:56:37,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:56:37,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:56:37,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:56:37,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:56:37,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:56:37,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:56:37,560 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:56:37,866 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:56:37,891 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:56:37,895 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:56:37,897 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:56:37,898 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:56:37,899 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/stateful_check.c [2019-11-23 21:56:37,962 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffb7aa99c/b190ac682a9544e6a1f03492c69598bb/FLAG6752b12f4 [2019-11-23 21:56:38,444 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:56:38,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/stateful_check.c [2019-11-23 21:56:38,452 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffb7aa99c/b190ac682a9544e6a1f03492c69598bb/FLAG6752b12f4 [2019-11-23 21:56:38,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffb7aa99c/b190ac682a9544e6a1f03492c69598bb [2019-11-23 21:56:38,796 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:56:38,797 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:56:38,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:56:38,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:56:38,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:56:38,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:56:38" (1/1) ... [2019-11-23 21:56:38,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df53137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:56:38, skipping insertion in model container [2019-11-23 21:56:38,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:56:38" (1/1) ... [2019-11-23 21:56:38,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:56:38,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:56:39,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:56:39,009 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:56:39,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:56:39,067 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:56:39,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:56:39 WrapperNode [2019-11-23 21:56:39,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:56:39,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:56:39,069 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:56:39,070 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:56:39,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:56:39" (1/1) ... [2019-11-23 21:56:39,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:56:39" (1/1) ... [2019-11-23 21:56:39,182 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:56:39,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:56:39,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:56:39,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:56:39,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:56:39" (1/1) ... [2019-11-23 21:56:39,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:56:39" (1/1) ... [2019-11-23 21:56:39,193 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:56:39" (1/1) ... [2019-11-23 21:56:39,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:56:39" (1/1) ... [2019-11-23 21:56:39,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:56:39" (1/1) ... [2019-11-23 21:56:39,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:56:39" (1/1) ... [2019-11-23 21:56:39,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:56:39" (1/1) ... [2019-11-23 21:56:39,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:56:39,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:56:39,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:56:39,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:56:39,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:56:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:56:39,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:56:39,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:56:39,616 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:56:39,616 INFO L284 CfgBuilder]: Removed 35 assume(true) statements. [2019-11-23 21:56:39,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:56:39 BoogieIcfgContainer [2019-11-23 21:56:39,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:56:39,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:56:39,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:56:39,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:56:39,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:56:38" (1/3) ... [2019-11-23 21:56:39,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eae00d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:56:39, skipping insertion in model container [2019-11-23 21:56:39,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:56:39" (2/3) ... [2019-11-23 21:56:39,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eae00d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:56:39, skipping insertion in model container [2019-11-23 21:56:39,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:56:39" (3/3) ... [2019-11-23 21:56:39,626 INFO L109 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2019-11-23 21:56:39,635 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:56:39,643 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-11-23 21:56:39,655 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-11-23 21:56:39,686 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:56:39,687 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:56:39,687 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:56:39,687 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:56:39,687 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:56:39,687 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:56:39,688 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:56:39,688 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:56:39,704 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2019-11-23 21:56:39,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 21:56:39,709 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:56:39,710 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 21:56:39,710 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:56:39,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:56:39,715 INFO L82 PathProgramCache]: Analyzing trace with hash 889605129, now seen corresponding path program 1 times [2019-11-23 21:56:39,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:56:39,724 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018020167] [2019-11-23 21:56:39,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:56:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:56:39,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:56:39,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018020167] [2019-11-23 21:56:39,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:56:39,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 21:56:39,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92137284] [2019-11-23 21:56:39,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 21:56:39,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:56:39,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 21:56:39,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 21:56:39,849 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 2 states. [2019-11-23 21:56:39,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:56:39,874 INFO L93 Difference]: Finished difference Result 89 states and 123 transitions. [2019-11-23 21:56:39,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 21:56:39,876 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-11-23 21:56:39,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:56:39,889 INFO L225 Difference]: With dead ends: 89 [2019-11-23 21:56:39,889 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 21:56:39,893 INFO L630 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 [2019-11-23 21:56:39,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 21:56:39,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-11-23 21:56:39,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 21:56:39,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2019-11-23 21:56:39,943 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 6 [2019-11-23 21:56:39,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:56:39,944 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2019-11-23 21:56:39,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 21:56:39,945 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2019-11-23 21:56:39,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 21:56:39,945 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:56:39,945 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:56:39,947 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:56:39,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:56:39,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1804046918, now seen corresponding path program 1 times [2019-11-23 21:56:39,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:56:39,950 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529480930] [2019-11-23 21:56:39,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:56:39,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:56:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:56:40,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529480930] [2019-11-23 21:56:40,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:56:40,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 21:56:40,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347201388] [2019-11-23 21:56:40,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:56:40,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:56:40,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:56:40,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:56:40,027 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 3 states. [2019-11-23 21:56:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:56:40,102 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2019-11-23 21:56:40,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:56:40,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 21:56:40,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:56:40,105 INFO L225 Difference]: With dead ends: 70 [2019-11-23 21:56:40,105 INFO L226 Difference]: Without dead ends: 63 [2019-11-23 21:56:40,106 INFO L630 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 [2019-11-23 21:56:40,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-23 21:56:40,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-11-23 21:56:40,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 21:56:40,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2019-11-23 21:56:40,118 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 7 [2019-11-23 21:56:40,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:56:40,118 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2019-11-23 21:56:40,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:56:40,119 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2019-11-23 21:56:40,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 21:56:40,120 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:56:40,120 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:56:40,120 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:56:40,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:56:40,121 INFO L82 PathProgramCache]: Analyzing trace with hash -147365405, now seen corresponding path program 1 times [2019-11-23 21:56:40,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:56:40,121 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448704034] [2019-11-23 21:56:40,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:56:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:56:40,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:56:40,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448704034] [2019-11-23 21:56:40,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:56:40,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:56:40,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564801629] [2019-11-23 21:56:40,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:56:40,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:56:40,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:56:40,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:56:40,188 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 3 states. [2019-11-23 21:56:40,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:56:40,239 INFO L93 Difference]: Finished difference Result 150 states and 212 transitions. [2019-11-23 21:56:40,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:56:40,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-23 21:56:40,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:56:40,241 INFO L225 Difference]: With dead ends: 150 [2019-11-23 21:56:40,242 INFO L226 Difference]: Without dead ends: 90 [2019-11-23 21:56:40,243 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:56:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-23 21:56:40,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2019-11-23 21:56:40,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-23 21:56:40,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 122 transitions. [2019-11-23 21:56:40,257 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 122 transitions. Word has length 15 [2019-11-23 21:56:40,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:56:40,257 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 122 transitions. [2019-11-23 21:56:40,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:56:40,258 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 122 transitions. [2019-11-23 21:56:40,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 21:56:40,259 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:56:40,259 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:56:40,259 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:56:40,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:56:40,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1293798555, now seen corresponding path program 1 times [2019-11-23 21:56:40,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:56:40,260 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363071599] [2019-11-23 21:56:40,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:56:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:56:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 21:56:40,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363071599] [2019-11-23 21:56:40,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:56:40,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:56:40,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739947859] [2019-11-23 21:56:40,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:56:40,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:56:40,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:56:40,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:56:40,327 INFO L87 Difference]: Start difference. First operand 87 states and 122 transitions. Second operand 3 states. [2019-11-23 21:56:40,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:56:40,377 INFO L93 Difference]: Finished difference Result 208 states and 300 transitions. [2019-11-23 21:56:40,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:56:40,377 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2019-11-23 21:56:40,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:56:40,381 INFO L225 Difference]: With dead ends: 208 [2019-11-23 21:56:40,382 INFO L226 Difference]: Without dead ends: 124 [2019-11-23 21:56:40,386 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:56:40,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-11-23 21:56:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2019-11-23 21:56:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-23 21:56:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 177 transitions. [2019-11-23 21:56:40,412 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 177 transitions. Word has length 22 [2019-11-23 21:56:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:56:40,413 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 177 transitions. [2019-11-23 21:56:40,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:56:40,413 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 177 transitions. [2019-11-23 21:56:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 21:56:40,419 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:56:40,419 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:56:40,420 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:56:40,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:56:40,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1319564790, now seen corresponding path program 1 times [2019-11-23 21:56:40,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:56:40,421 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414417496] [2019-11-23 21:56:40,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:56:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:56:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:56:40,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414417496] [2019-11-23 21:56:40,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315199896] [2019-11-23 21:56:40,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:56:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:56:40,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 21:56:40,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:56:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:56:40,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:56:40,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2019-11-23 21:56:40,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307223041] [2019-11-23 21:56:40,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:56:40,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:56:40,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:56:40,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:56:40,561 INFO L87 Difference]: Start difference. First operand 121 states and 177 transitions. Second operand 5 states. [2019-11-23 21:56:40,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:56:40,658 INFO L93 Difference]: Finished difference Result 344 states and 529 transitions. [2019-11-23 21:56:40,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 21:56:40,659 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-23 21:56:40,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:56:40,661 INFO L225 Difference]: With dead ends: 344 [2019-11-23 21:56:40,662 INFO L226 Difference]: Without dead ends: 226 [2019-11-23 21:56:40,663 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:56:40,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-11-23 21:56:40,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 217. [2019-11-23 21:56:40,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-11-23 21:56:40,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 327 transitions. [2019-11-23 21:56:40,686 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 327 transitions. Word has length 22 [2019-11-23 21:56:40,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:56:40,686 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 327 transitions. [2019-11-23 21:56:40,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:56:40,687 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 327 transitions. [2019-11-23 21:56:40,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 21:56:40,688 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:56:40,688 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:56:40,893 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:56:40,894 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:56:40,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:56:40,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1040975168, now seen corresponding path program 1 times [2019-11-23 21:56:40,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:56:40,896 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939462157] [2019-11-23 21:56:40,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:56:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:56:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 21:56:40,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939462157] [2019-11-23 21:56:40,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:56:40,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:56:40,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110471570] [2019-11-23 21:56:40,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:56:40,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:56:40,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:56:40,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:56:40,951 INFO L87 Difference]: Start difference. First operand 217 states and 327 transitions. Second operand 4 states. [2019-11-23 21:56:41,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:56:41,029 INFO L93 Difference]: Finished difference Result 629 states and 979 transitions. [2019-11-23 21:56:41,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:56:41,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-11-23 21:56:41,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:56:41,032 INFO L225 Difference]: With dead ends: 629 [2019-11-23 21:56:41,032 INFO L226 Difference]: Without dead ends: 415 [2019-11-23 21:56:41,034 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:56:41,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2019-11-23 21:56:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 313. [2019-11-23 21:56:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2019-11-23 21:56:41,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 487 transitions. [2019-11-23 21:56:41,061 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 487 transitions. Word has length 29 [2019-11-23 21:56:41,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:56:41,061 INFO L462 AbstractCegarLoop]: Abstraction has 313 states and 487 transitions. [2019-11-23 21:56:41,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:56:41,066 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 487 transitions. [2019-11-23 21:56:41,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 21:56:41,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:56:41,070 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:56:41,070 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:56:41,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:56:41,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1446791270, now seen corresponding path program 1 times [2019-11-23 21:56:41,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:56:41,071 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975548257] [2019-11-23 21:56:41,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:56:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-23 21:56:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-23 21:56:41,139 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-23 21:56:41,139 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-23 21:56:41,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:56:41 BoogieIcfgContainer [2019-11-23 21:56:41,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-23 21:56:41,187 INFO L168 Benchmark]: Toolchain (without parser) took 2388.39 ms. Allocated memory was 136.3 MB in the beginning and 228.1 MB in the end (delta: 91.8 MB). Free memory was 101.2 MB in the beginning and 180.8 MB in the end (delta: -79.7 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2019-11-23 21:56:41,187 INFO L168 Benchmark]: CDTParser took 0.50 ms. Allocated memory is still 136.3 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2019-11-23 21:56:41,188 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.40 ms. Allocated memory is still 136.3 MB. Free memory was 100.7 MB in the beginning and 90.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2019-11-23 21:56:41,189 INFO L168 Benchmark]: Boogie Procedure Inliner took 112.52 ms. Allocated memory was 136.3 MB in the beginning and 199.2 MB in the end (delta: 62.9 MB). Free memory was 90.6 MB in the beginning and 178.3 MB in the end (delta: -87.7 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2019-11-23 21:56:41,190 INFO L168 Benchmark]: Boogie Preprocessor took 24.85 ms. Allocated memory is still 199.2 MB. Free memory was 178.3 MB in the beginning and 176.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2019-11-23 21:56:41,191 INFO L168 Benchmark]: RCFGBuilder took 410.84 ms. Allocated memory is still 199.2 MB. Free memory was 176.9 MB in the beginning and 159.1 MB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. [2019-11-23 21:56:41,192 INFO L168 Benchmark]: TraceAbstraction took 1565.01 ms. Allocated memory was 199.2 MB in the beginning and 228.1 MB in the end (delta: 28.8 MB). Free memory was 158.4 MB in the beginning and 180.8 MB in the end (delta: -22.5 MB). Peak memory consumption was 6.4 MB. Max. memory is 7.1 GB. [2019-11-23 21:56:41,196 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50 ms. Allocated memory is still 136.3 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 270.40 ms. Allocated memory is still 136.3 MB. Free memory was 100.7 MB in the beginning and 90.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 112.52 ms. Allocated memory was 136.3 MB in the beginning and 199.2 MB in the end (delta: 62.9 MB). Free memory was 90.6 MB in the beginning and 178.3 MB in the end (delta: -87.7 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.85 ms. Allocated memory is still 199.2 MB. Free memory was 178.3 MB in the beginning and 176.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 410.84 ms. Allocated memory is still 199.2 MB. Free memory was 176.9 MB in the beginning and 159.1 MB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1565.01 ms. Allocated memory was 199.2 MB in the beginning and 228.1 MB in the end (delta: 28.8 MB). Free memory was 158.4 MB in the beginning and 180.8 MB in the end (delta: -22.5 MB). Peak memory consumption was 6.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] int ldv_mutex = 1; [L11] int open_called = 0; VAL [ldv_mutex=1, open_called=0] [L74] int ldv_s_misc_fops_file_operations = 0; [L69] open_called = 0 [L70] return 0; VAL [ldv_mutex=1, open_called=0] [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: VAL [ldv_mutex=1, open_called=0] [L81] COND TRUE ldv_s_misc_fops_file_operations==0 [L57] COND TRUE __VERIFIER_nondet_int() [L59] return 1; VAL [ldv_mutex=1, open_called=0] [L83] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: VAL [ldv_mutex=1, open_called=0] [L89] COND TRUE ldv_s_misc_fops_file_operations==1 [L52] return 0; VAL [ldv_mutex=1, open_called=0] [L91] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L96] case 2: VAL [ldv_mutex=1, open_called=0] [L97] COND TRUE ldv_s_misc_fops_file_operations==2 [L48] return 0; VAL [ldv_mutex=1, open_called=0] [L99] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L96] case 2: [L104] case 3: VAL [ldv_mutex=1, open_called=0] [L105] COND TRUE ldv_s_misc_fops_file_operations==3 [L34] COND FALSE !(\read(open_called)) VAL [ldv_mutex=1, open_called=0] [L16] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [ldv_mutex=1, open_called=0] [L17] ldv_mutex = 2 VAL [ldv_mutex=2, open_called=0] [L16] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [ldv_mutex=2, open_called=0] [L4] __VERIFIER_error() VAL [ldv_mutex=2, open_called=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 46 locations, 5 error locations. Result: UNSAFE, OverallTime: 1.4s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 297 SDtfs, 164 SDslu, 310 SDs, 0 SdLazy, 98 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=313occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 117 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 160 NumberOfCodeBlocks, 160 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 116 ConstructedInterpolants, 0 QuantifiedInterpolants, 5084 SizeOfPredicates, 1 NumberOfNonLiveVariables, 56 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 7 InterpolantComputations, 5 PerfectInterpolantSequences, 14/20 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...