/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:16:14,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:16:14,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:16:14,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:16:14,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:16:14,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:16:14,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:16:14,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:16:14,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:16:14,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:16:14,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:16:14,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:16:14,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:16:14,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:16:14,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:16:14,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:16:14,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:16:14,755 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:16:14,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:16:14,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:16:14,757 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 [2019-11-06 19:16:14,771 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:16:14,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:16:14,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:16:14,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:16:14,773 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:16:14,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:16:14,773 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:16:14,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:16:14,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:16:14,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:16:14,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:16:14,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:16:14,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:16:14,774 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:16:14,775 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:16:14,775 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:16:14,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:16:14,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:16:14,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:16:14,776 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:16:14,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:16:14,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:16:14,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:16:14,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:16:14,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:16:14,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:16:14,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:16:14,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:16:14,777 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:16:15,042 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:16:15,055 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:16:15,058 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:16:15,060 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:16:15,060 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:16:15,061 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label40.c [2019-11-06 19:16:15,133 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf8809a2c/2a86338ad68b4a3f9cb0b7d1b87b46c4/FLAG9820c0f8b [2019-11-06 19:16:15,784 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:16:15,785 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label40.c [2019-11-06 19:16:15,807 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf8809a2c/2a86338ad68b4a3f9cb0b7d1b87b46c4/FLAG9820c0f8b [2019-11-06 19:16:15,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf8809a2c/2a86338ad68b4a3f9cb0b7d1b87b46c4 [2019-11-06 19:16:15,947 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:16:15,948 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:16:15,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:16:15,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:16:15,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:16:15,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:16:15" (1/1) ... [2019-11-06 19:16:15,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c8c75d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:15, skipping insertion in model container [2019-11-06 19:16:15,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:16:15" (1/1) ... [2019-11-06 19:16:15,966 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:16:16,048 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:16:16,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:16:16,877 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:16:17,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:16:17,477 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:16:17,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:17 WrapperNode [2019-11-06 19:16:17,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:16:17,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:16:17,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:16:17,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:16:17,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:17" (1/1) ... [2019-11-06 19:16:17,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:17" (1/1) ... [2019-11-06 19:16:17,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:17" (1/1) ... [2019-11-06 19:16:17,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:17" (1/1) ... [2019-11-06 19:16:17,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:17" (1/1) ... [2019-11-06 19:16:17,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:17" (1/1) ... [2019-11-06 19:16:17,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:17" (1/1) ... [2019-11-06 19:16:17,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:16:17,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:16:17,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:16:17,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:16:17,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:17" (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 [2019-11-06 19:16:17,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:16:17,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:16:17,730 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:16:17,730 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:16:17,730 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:16:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:16:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:16:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:16:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:16:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:16:17,732 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:16:17,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:16:17,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:16:21,330 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:16:21,330 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:16:21,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:16:21 BoogieIcfgContainer [2019-11-06 19:16:21,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:16:21,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:16:21,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:16:21,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:16:21,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:16:15" (1/3) ... [2019-11-06 19:16:21,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b42b6d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:16:21, skipping insertion in model container [2019-11-06 19:16:21,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:17" (2/3) ... [2019-11-06 19:16:21,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b42b6d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:16:21, skipping insertion in model container [2019-11-06 19:16:21,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:16:21" (3/3) ... [2019-11-06 19:16:21,340 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label40.c [2019-11-06 19:16:21,349 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:16:21,358 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:16:21,370 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:16:21,400 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:16:21,400 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:16:21,400 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:16:21,400 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:16:21,400 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:16:21,400 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:16:21,401 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:16:21,401 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:16:21,428 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 19:16:21,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 19:16:21,436 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:21,437 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:16:21,439 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:21,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:21,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1190948056, now seen corresponding path program 1 times [2019-11-06 19:16:21,454 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:21,454 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835287741] [2019-11-06 19:16:21,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:21,796 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835287741] [2019-11-06 19:16:21,797 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:16:21,797 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:16:21,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060506992] [2019-11-06 19:16:21,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:16:21,804 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:21,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:16:21,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:16:21,821 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-11-06 19:16:28,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:28,583 INFO L93 Difference]: Finished difference Result 1513 states and 2781 transitions. [2019-11-06 19:16:28,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:16:28,585 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2019-11-06 19:16:28,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:28,621 INFO L225 Difference]: With dead ends: 1513 [2019-11-06 19:16:28,622 INFO L226 Difference]: Without dead ends: 1007 [2019-11-06 19:16:28,637 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:16:28,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2019-11-06 19:16:28,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 999. [2019-11-06 19:16:28,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 999 states. [2019-11-06 19:16:28,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1377 transitions. [2019-11-06 19:16:28,779 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1377 transitions. Word has length 32 [2019-11-06 19:16:28,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:28,780 INFO L462 AbstractCegarLoop]: Abstraction has 999 states and 1377 transitions. [2019-11-06 19:16:28,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:16:28,781 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1377 transitions. [2019-11-06 19:16:28,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-06 19:16:28,785 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:28,786 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:16:28,786 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:28,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:28,787 INFO L82 PathProgramCache]: Analyzing trace with hash 679417420, now seen corresponding path program 1 times [2019-11-06 19:16:28,787 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:28,787 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464463995] [2019-11-06 19:16:28,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:29,222 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464463995] [2019-11-06 19:16:29,222 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509720600] [2019-11-06 19:16:29,222 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 [2019-11-06 19:16:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:29,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:16:29,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:16:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:29,511 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:16:29,512 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2019-11-06 19:16:29,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565138883] [2019-11-06 19:16:29,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:16:29,518 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:29,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:16:29,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:16:29,520 INFO L87 Difference]: Start difference. First operand 999 states and 1377 transitions. Second operand 5 states. [2019-11-06 19:16:35,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:35,645 INFO L93 Difference]: Finished difference Result 2330 states and 3155 transitions. [2019-11-06 19:16:35,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:16:35,647 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 101 [2019-11-06 19:16:35,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:35,682 INFO L225 Difference]: With dead ends: 2330 [2019-11-06 19:16:35,682 INFO L226 Difference]: Without dead ends: 1337 [2019-11-06 19:16:35,687 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:16:35,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2019-11-06 19:16:35,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1324. [2019-11-06 19:16:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1324 states. [2019-11-06 19:16:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1735 transitions. [2019-11-06 19:16:35,734 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1735 transitions. Word has length 101 [2019-11-06 19:16:35,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:35,734 INFO L462 AbstractCegarLoop]: Abstraction has 1324 states and 1735 transitions. [2019-11-06 19:16:35,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:16:35,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1735 transitions. [2019-11-06 19:16:35,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-06 19:16:35,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:35,738 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:16:35,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:35,943 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:35,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:35,943 INFO L82 PathProgramCache]: Analyzing trace with hash -603532513, now seen corresponding path program 1 times [2019-11-06 19:16:35,944 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:35,944 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174913088] [2019-11-06 19:16:35,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:36,304 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174913088] [2019-11-06 19:16:36,305 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:16:36,305 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:16:36,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21304216] [2019-11-06 19:16:36,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:16:36,306 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:36,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:16:36,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:16:36,307 INFO L87 Difference]: Start difference. First operand 1324 states and 1735 transitions. Second operand 9 states. [2019-11-06 19:16:43,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:43,020 INFO L93 Difference]: Finished difference Result 3952 states and 5514 transitions. [2019-11-06 19:16:43,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:16:43,022 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 106 [2019-11-06 19:16:43,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:43,036 INFO L225 Difference]: With dead ends: 3952 [2019-11-06 19:16:43,037 INFO L226 Difference]: Without dead ends: 2941 [2019-11-06 19:16:43,040 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:16:43,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2019-11-06 19:16:43,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 2604. [2019-11-06 19:16:43,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2604 states. [2019-11-06 19:16:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 3401 transitions. [2019-11-06 19:16:43,114 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 3401 transitions. Word has length 106 [2019-11-06 19:16:43,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:43,115 INFO L462 AbstractCegarLoop]: Abstraction has 2604 states and 3401 transitions. [2019-11-06 19:16:43,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:16:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 3401 transitions. [2019-11-06 19:16:43,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-06 19:16:43,117 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:43,118 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:16:43,118 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:43,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:43,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1976934134, now seen corresponding path program 1 times [2019-11-06 19:16:43,119 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:43,119 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529525124] [2019-11-06 19:16:43,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:43,376 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529525124] [2019-11-06 19:16:43,376 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452767802] [2019-11-06 19:16:43,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:43,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 19:16:43,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:16:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:43,555 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:16:43,555 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-11-06 19:16:43,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515097838] [2019-11-06 19:16:43,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 19:16:43,559 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:43,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 19:16:43,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:16:43,560 INFO L87 Difference]: Start difference. First operand 2604 states and 3401 transitions. Second operand 13 states.