/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/Problem14_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:13:37,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:13:37,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:13:37,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:13:37,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:13:37,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:13:37,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:13:37,662 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 19:13:37,679 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:13:37,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:13:37,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:13:37,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:13:37,681 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:13:37,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:13:37,682 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:13:37,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:13:37,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:13:37,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:13:37,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:13:37,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:13:37,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:13:37,684 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:13:37,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:13:37,684 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:13:37,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:13:37,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:13:37,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:13:37,685 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:13:37,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:13:37,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:13:37,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:13:37,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:13:37,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:13:37,686 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:13:37,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:13:37,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:13:37,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:13:37,953 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:13:37,966 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:13:37,970 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:13:37,972 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:13:37,972 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:13:37,973 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label28.c [2019-11-06 19:13:38,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e69551776/92cf2e8fa4a4485e9c8c9c5bfd83bcde/FLAGeeb383f6d [2019-11-06 19:13:38,634 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:13:38,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label28.c [2019-11-06 19:13:38,647 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e69551776/92cf2e8fa4a4485e9c8c9c5bfd83bcde/FLAGeeb383f6d [2019-11-06 19:13:38,899 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e69551776/92cf2e8fa4a4485e9c8c9c5bfd83bcde [2019-11-06 19:13:38,910 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:13:38,911 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:13:38,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:13:38,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:13:38,916 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:13:38,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:13:38" (1/1) ... [2019-11-06 19:13:38,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3f1635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:38, skipping insertion in model container [2019-11-06 19:13:38,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:13:38" (1/1) ... [2019-11-06 19:13:38,927 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:13:38,982 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:13:39,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:13:39,577 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:13:39,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:13:39,757 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:13:39,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:39 WrapperNode [2019-11-06 19:13:39,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:13:39,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:13:39,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:13:39,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:13:39,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:39" (1/1) ... [2019-11-06 19:13:39,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:39" (1/1) ... [2019-11-06 19:13:39,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:39" (1/1) ... [2019-11-06 19:13:39,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:39" (1/1) ... [2019-11-06 19:13:39,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:39" (1/1) ... [2019-11-06 19:13:39,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:39" (1/1) ... [2019-11-06 19:13:39,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:39" (1/1) ... [2019-11-06 19:13:39,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:13:39,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:13:39,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:13:39,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:13:39,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:39" (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 [2019-11-06 19:13:40,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:13:40,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:13:40,051 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:13:40,052 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:13:40,052 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:13:40,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:13:40,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:13:40,054 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:13:40,054 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:13:40,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:13:40,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:13:41,685 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:13:41,685 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:13:41,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:13:41 BoogieIcfgContainer [2019-11-06 19:13:41,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:13:41,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:13:41,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:13:41,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:13:41,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:13:38" (1/3) ... [2019-11-06 19:13:41,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590b158e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:13:41, skipping insertion in model container [2019-11-06 19:13:41,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:39" (2/3) ... [2019-11-06 19:13:41,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590b158e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:13:41, skipping insertion in model container [2019-11-06 19:13:41,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:13:41" (3/3) ... [2019-11-06 19:13:41,696 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label28.c [2019-11-06 19:13:41,706 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:13:41,714 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:13:41,726 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:13:41,754 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:13:41,754 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:13:41,754 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:13:41,754 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:13:41,755 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:13:41,755 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:13:41,755 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:13:41,755 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:13:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:13:41,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 19:13:41,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:41,788 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:13:41,790 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:41,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:41,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1694474349, now seen corresponding path program 1 times [2019-11-06 19:13:41,806 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:41,806 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570119227] [2019-11-06 19:13:41,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:42,103 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 19:13:42,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570119227] [2019-11-06 19:13:42,108 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:13:42,109 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:13:42,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802227713] [2019-11-06 19:13:42,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:13:42,117 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:42,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:13:42,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:13:42,135 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-11-06 19:13:44,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:44,831 INFO L93 Difference]: Finished difference Result 902 states and 1625 transitions. [2019-11-06 19:13:44,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:13:44,832 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-06 19:13:44,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:44,852 INFO L225 Difference]: With dead ends: 902 [2019-11-06 19:13:44,852 INFO L226 Difference]: Without dead ends: 564 [2019-11-06 19:13:44,860 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 19:13:44,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-06 19:13:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 376. [2019-11-06 19:13:44,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2019-11-06 19:13:44,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 528 transitions. [2019-11-06 19:13:44,944 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 528 transitions. Word has length 16 [2019-11-06 19:13:44,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:44,944 INFO L462 AbstractCegarLoop]: Abstraction has 376 states and 528 transitions. [2019-11-06 19:13:44,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:13:44,945 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 528 transitions. [2019-11-06 19:13:44,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-06 19:13:44,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:44,950 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-11-06 19:13:44,950 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:44,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:44,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1881013151, now seen corresponding path program 1 times [2019-11-06 19:13:44,951 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:44,951 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386250199] [2019-11-06 19:13:44,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:45,494 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386250199] [2019-11-06 19:13:45,494 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:13:45,494 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:13:45,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323867972] [2019-11-06 19:13:45,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:13:45,497 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:45,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:13:45,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:13:45,498 INFO L87 Difference]: Start difference. First operand 376 states and 528 transitions. Second operand 9 states. [2019-11-06 19:13:47,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:47,349 INFO L93 Difference]: Finished difference Result 970 states and 1372 transitions. [2019-11-06 19:13:47,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 19:13:47,350 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 99 [2019-11-06 19:13:47,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:47,356 INFO L225 Difference]: With dead ends: 970 [2019-11-06 19:13:47,356 INFO L226 Difference]: Without dead ends: 600 [2019-11-06 19:13:47,359 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:13:47,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-11-06 19:13:47,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 566. [2019-11-06 19:13:47,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-11-06 19:13:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 747 transitions. [2019-11-06 19:13:47,415 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 747 transitions. Word has length 99 [2019-11-06 19:13:47,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:47,416 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 747 transitions. [2019-11-06 19:13:47,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:13:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 747 transitions. [2019-11-06 19:13:47,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-06 19:13:47,419 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:47,419 INFO L410 BasicCegarLoop]: trace histogram [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, 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 19:13:47,420 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:47,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:47,420 INFO L82 PathProgramCache]: Analyzing trace with hash -2144779955, now seen corresponding path program 1 times [2019-11-06 19:13:47,421 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:47,421 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437081510] [2019-11-06 19:13:47,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:47,588 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437081510] [2019-11-06 19:13:47,588 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739551741] [2019-11-06 19:13:47,588 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 19:13:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:47,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:13:47,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:47,750 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:13:47,751 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 19:13:47,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368654339] [2019-11-06 19:13:47,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:13:47,752 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:47,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:13:47,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:13:47,753 INFO L87 Difference]: Start difference. First operand 566 states and 747 transitions. Second operand 3 states. [2019-11-06 19:13:48,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:48,599 INFO L93 Difference]: Finished difference Result 1678 states and 2248 transitions. [2019-11-06 19:13:48,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:13:48,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2019-11-06 19:13:48,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:48,611 INFO L225 Difference]: With dead ends: 1678 [2019-11-06 19:13:48,611 INFO L226 Difference]: Without dead ends: 1118 [2019-11-06 19:13:48,613 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:13:48,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2019-11-06 19:13:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1118. [2019-11-06 19:13:48,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1118 states. [2019-11-06 19:13:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1443 transitions. [2019-11-06 19:13:48,662 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1443 transitions. Word has length 125 [2019-11-06 19:13:48,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:48,663 INFO L462 AbstractCegarLoop]: Abstraction has 1118 states and 1443 transitions. [2019-11-06 19:13:48,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:13:48,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1443 transitions. [2019-11-06 19:13:48,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-06 19:13:48,667 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:48,667 INFO L410 BasicCegarLoop]: trace histogram [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, 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 19:13:48,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:48,872 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:48,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:48,873 INFO L82 PathProgramCache]: Analyzing trace with hash 386406922, now seen corresponding path program 1 times [2019-11-06 19:13:48,873 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:48,874 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399913681] [2019-11-06 19:13:48,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:49,352 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399913681] [2019-11-06 19:13:49,352 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:13:49,352 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:13:49,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857959619] [2019-11-06 19:13:49,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:13:49,355 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:49,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:13:49,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:13:49,356 INFO L87 Difference]: Start difference. First operand 1118 states and 1443 transitions. Second operand 9 states. [2019-11-06 19:13:51,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:51,123 INFO L93 Difference]: Finished difference Result 2654 states and 3666 transitions. [2019-11-06 19:13:51,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:13:51,126 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 156 [2019-11-06 19:13:51,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:51,141 INFO L225 Difference]: With dead ends: 2654 [2019-11-06 19:13:51,141 INFO L226 Difference]: Without dead ends: 1724 [2019-11-06 19:13:51,144 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:13:51,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1724 states. [2019-11-06 19:13:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1724 to 1694. [2019-11-06 19:13:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1694 states. [2019-11-06 19:13:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 2162 transitions. [2019-11-06 19:13:51,210 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 2162 transitions. Word has length 156 [2019-11-06 19:13:51,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:51,212 INFO L462 AbstractCegarLoop]: Abstraction has 1694 states and 2162 transitions. [2019-11-06 19:13:51,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:13:51,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 2162 transitions. [2019-11-06 19:13:51,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-06 19:13:51,218 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:51,218 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:13:51,219 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:51,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:51,219 INFO L82 PathProgramCache]: Analyzing trace with hash -380685670, now seen corresponding path program 1 times [2019-11-06 19:13:51,220 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:51,220 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024593307] [2019-11-06 19:13:51,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 24 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:13:52,227 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024593307] [2019-11-06 19:13:52,227 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031531912] [2019-11-06 19:13:52,227 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 19:13:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:52,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 19:13:52,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:52,431 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:13:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 49 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:52,553 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:13:52,553 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2019-11-06 19:13:52,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157703962] [2019-11-06 19:13:52,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:13:52,555 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:52,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:13:52,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:13:52,555 INFO L87 Difference]: Start difference. First operand 1694 states and 2162 transitions. Second operand 16 states. [2019-11-06 19:13:56,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:56,300 INFO L93 Difference]: Finished difference Result 3704 states and 4746 transitions. [2019-11-06 19:13:56,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 19:13:56,301 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 183 [2019-11-06 19:13:56,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:56,315 INFO L225 Difference]: With dead ends: 3704 [2019-11-06 19:13:56,315 INFO L226 Difference]: Without dead ends: 2151 [2019-11-06 19:13:56,320 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 19:13:56,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2019-11-06 19:13:56,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 2072. [2019-11-06 19:13:56,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2072 states. [2019-11-06 19:13:56,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 2443 transitions. [2019-11-06 19:13:56,384 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 2443 transitions. Word has length 183 [2019-11-06 19:13:56,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:56,385 INFO L462 AbstractCegarLoop]: Abstraction has 2072 states and 2443 transitions. [2019-11-06 19:13:56,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 19:13:56,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 2443 transitions. [2019-11-06 19:13:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2019-11-06 19:13:56,390 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:56,391 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2019-11-06 19:13:56,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:56,595 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:56,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:56,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1313841146, now seen corresponding path program 1 times [2019-11-06 19:13:56,597 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:56,597 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054166120] [2019-11-06 19:13:56,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-06 19:13:57,041 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054166120] [2019-11-06 19:13:57,041 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389328244] [2019-11-06 19:13:57,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:57,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:13:57,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-11-06 19:13:57,266 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:13:57,266 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-11-06 19:13:57,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376776286] [2019-11-06 19:13:57,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:13:57,268 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:57,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:13:57,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:13:57,272 INFO L87 Difference]: Start difference. First operand 2072 states and 2443 transitions. Second operand 9 states. [2019-11-06 19:13:59,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:59,475 INFO L93 Difference]: Finished difference Result 5068 states and 6144 transitions. [2019-11-06 19:13:59,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:13:59,476 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 318 [2019-11-06 19:13:59,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:59,492 INFO L225 Difference]: With dead ends: 5068 [2019-11-06 19:13:59,492 INFO L226 Difference]: Without dead ends: 3184 [2019-11-06 19:13:59,497 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 329 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:13:59,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2019-11-06 19:13:59,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 3002. [2019-11-06 19:13:59,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3002 states. [2019-11-06 19:13:59,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 3587 transitions. [2019-11-06 19:13:59,575 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 3587 transitions. Word has length 318 [2019-11-06 19:13:59,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:59,575 INFO L462 AbstractCegarLoop]: Abstraction has 3002 states and 3587 transitions. [2019-11-06 19:13:59,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:13:59,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 3587 transitions. [2019-11-06 19:13:59,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2019-11-06 19:13:59,583 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:59,584 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 19:13:59,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:59,788 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:59,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:59,789 INFO L82 PathProgramCache]: Analyzing trace with hash -962923323, now seen corresponding path program 1 times [2019-11-06 19:13:59,789 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:59,790 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627864296] [2019-11-06 19:13:59,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2019-11-06 19:14:00,176 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627864296] [2019-11-06 19:14:00,176 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840810293] [2019-11-06 19:14:00,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:00,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:00,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-06 19:14:00,422 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:00,423 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 19:14:00,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157896417] [2019-11-06 19:14:00,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:00,425 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:00,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:00,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:14:00,426 INFO L87 Difference]: Start difference. First operand 3002 states and 3587 transitions. Second operand 3 states. [2019-11-06 19:14:01,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:01,115 INFO L93 Difference]: Finished difference Result 3916 states and 4649 transitions. [2019-11-06 19:14:01,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:01,117 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 397 [2019-11-06 19:14:01,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:01,136 INFO L225 Difference]: With dead ends: 3916 [2019-11-06 19:14:01,136 INFO L226 Difference]: Without dead ends: 3914 [2019-11-06 19:14:01,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:14:01,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3914 states. [2019-11-06 19:14:01,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3914 to 3186. [2019-11-06 19:14:01,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3186 states. [2019-11-06 19:14:01,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 3827 transitions. [2019-11-06 19:14:01,222 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 3827 transitions. Word has length 397 [2019-11-06 19:14:01,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:01,223 INFO L462 AbstractCegarLoop]: Abstraction has 3186 states and 3827 transitions. [2019-11-06 19:14:01,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:01,223 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 3827 transitions. [2019-11-06 19:14:01,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2019-11-06 19:14:01,230 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:01,231 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 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] [2019-11-06 19:14:01,434 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:01,435 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:01,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:01,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1507246003, now seen corresponding path program 1 times [2019-11-06 19:14:01,436 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:01,436 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086070557] [2019-11-06 19:14:01,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 288 proven. 6 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2019-11-06 19:14:02,588 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086070557] [2019-11-06 19:14:02,588 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234845075] [2019-11-06 19:14:02,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:02,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 19:14:02,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:02,754 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:14:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 289 proven. 2 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2019-11-06 19:14:02,953 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:02,953 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-11-06 19:14:02,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474562460] [2019-11-06 19:14:02,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:14:02,956 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:02,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:14:02,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:14:02,957 INFO L87 Difference]: Start difference. First operand 3186 states and 3827 transitions. Second operand 12 states. [2019-11-06 19:14:05,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:05,235 INFO L93 Difference]: Finished difference Result 6468 states and 7794 transitions. [2019-11-06 19:14:05,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:14:05,235 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 402 [2019-11-06 19:14:05,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:05,251 INFO L225 Difference]: With dead ends: 6468 [2019-11-06 19:14:05,252 INFO L226 Difference]: Without dead ends: 3431 [2019-11-06 19:14:05,259 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 419 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-11-06 19:14:05,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2019-11-06 19:14:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 3186. [2019-11-06 19:14:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3186 states. [2019-11-06 19:14:05,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 3651 transitions. [2019-11-06 19:14:05,331 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 3651 transitions. Word has length 402 [2019-11-06 19:14:05,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:05,332 INFO L462 AbstractCegarLoop]: Abstraction has 3186 states and 3651 transitions. [2019-11-06 19:14:05,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:14:05,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 3651 transitions. [2019-11-06 19:14:05,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2019-11-06 19:14:05,340 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:05,341 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:05,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:05,547 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:05,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:05,548 INFO L82 PathProgramCache]: Analyzing trace with hash 386822599, now seen corresponding path program 2 times [2019-11-06 19:14:05,548 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:05,549 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997959019] [2019-11-06 19:14:05,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 485 proven. 20 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-06 19:14:06,478 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997959019] [2019-11-06 19:14:06,478 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753371922] [2019-11-06 19:14:06,478 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:06,625 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 19:14:06,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 19:14:06,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:14:06,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:06,688 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:14:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 2 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-06 19:14:06,899 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:06,900 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-11-06 19:14:06,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142346079] [2019-11-06 19:14:06,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 19:14:06,901 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:06,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 19:14:06,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:14:06,902 INFO L87 Difference]: Start difference. First operand 3186 states and 3651 transitions. Second operand 17 states. [2019-11-06 19:14:12,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:12,720 INFO L93 Difference]: Finished difference Result 6242 states and 7251 transitions. [2019-11-06 19:14:12,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-06 19:14:12,721 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 428 [2019-11-06 19:14:12,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:12,735 INFO L225 Difference]: With dead ends: 6242 [2019-11-06 19:14:12,735 INFO L226 Difference]: Without dead ends: 3244 [2019-11-06 19:14:12,742 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 469 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=598, Invalid=2594, Unknown=0, NotChecked=0, Total=3192 [2019-11-06 19:14:12,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2019-11-06 19:14:12,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 2830. [2019-11-06 19:14:12,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2830 states. [2019-11-06 19:14:12,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2830 states to 2830 states and 3160 transitions. [2019-11-06 19:14:12,801 INFO L78 Accepts]: Start accepts. Automaton has 2830 states and 3160 transitions. Word has length 428 [2019-11-06 19:14:12,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:12,802 INFO L462 AbstractCegarLoop]: Abstraction has 2830 states and 3160 transitions. [2019-11-06 19:14:12,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 19:14:12,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2830 states and 3160 transitions. [2019-11-06 19:14:12,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2019-11-06 19:14:12,811 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:12,811 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 19:14:13,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:13,015 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:13,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:13,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1074735598, now seen corresponding path program 1 times [2019-11-06 19:14:13,016 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:13,016 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306985415] [2019-11-06 19:14:13,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 485 proven. 20 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-06 19:14:14,012 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306985415] [2019-11-06 19:14:14,012 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623560469] [2019-11-06 19:14:14,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:14,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:14:14,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:14,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:14:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 2 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-06 19:14:14,444 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:14,444 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-11-06 19:14:14,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301476472] [2019-11-06 19:14:14,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 19:14:14,446 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:14,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 19:14:14,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:14:14,447 INFO L87 Difference]: Start difference. First operand 2830 states and 3160 transitions. Second operand 17 states.