/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_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:12:26,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:12:26,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:12:26,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:12:26,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:12:26,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:12:26,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:12:26,642 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 19:12:26,674 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:12:26,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:12:26,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:12:26,679 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:12:26,679 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:12:26,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:12:26,679 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:12:26,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:12:26,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:12:26,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:12:26,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:12:26,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:12:26,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:12:26,683 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:12:26,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:12:26,683 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:12:26,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:12:26,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:12:26,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:12:26,684 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:12:26,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:12:26,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:12:26,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:12:26,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:12:26,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:12:26,686 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:12:26,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:12:26,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:12:26,687 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:12:26,990 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:12:27,003 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:12:27,007 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:12:27,009 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:12:27,009 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:12:27,010 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label05.c [2019-11-06 19:12:27,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c03d40d1/0a43cb657019475d8031fe88d6a01ed4/FLAG1f76a9fcc [2019-11-06 19:12:27,671 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:12:27,672 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label05.c [2019-11-06 19:12:27,688 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c03d40d1/0a43cb657019475d8031fe88d6a01ed4/FLAG1f76a9fcc [2019-11-06 19:12:27,913 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c03d40d1/0a43cb657019475d8031fe88d6a01ed4 [2019-11-06 19:12:27,923 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:12:27,924 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:12:27,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:12:27,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:12:27,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:12:27,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:12:27" (1/1) ... [2019-11-06 19:12:27,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c304c45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:27, skipping insertion in model container [2019-11-06 19:12:27,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:12:27" (1/1) ... [2019-11-06 19:12:27,944 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:12:28,004 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:12:28,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:12:28,591 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:12:28,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:12:28,756 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:12:28,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:28 WrapperNode [2019-11-06 19:12:28,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:12:28,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:12:28,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:12:28,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:12:28,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:28" (1/1) ... [2019-11-06 19:12:28,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:28" (1/1) ... [2019-11-06 19:12:28,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:28" (1/1) ... [2019-11-06 19:12:28,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:28" (1/1) ... [2019-11-06 19:12:28,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:28" (1/1) ... [2019-11-06 19:12:28,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:28" (1/1) ... [2019-11-06 19:12:28,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:28" (1/1) ... [2019-11-06 19:12:28,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:12:28,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:12:28,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:12:28,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:12:28,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:28" (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 19:12:29,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:12:29,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:12:29,003 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:12:29,004 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:12:29,004 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:12:29,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:12:29,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:12:29,005 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:12:29,005 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:12:29,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:12:29,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:12:30,660 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:12:30,662 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:12:30,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:12:30 BoogieIcfgContainer [2019-11-06 19:12:30,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:12:30,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:12:30,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:12:30,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:12:30,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:12:27" (1/3) ... [2019-11-06 19:12:30,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@665490a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:12:30, skipping insertion in model container [2019-11-06 19:12:30,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:28" (2/3) ... [2019-11-06 19:12:30,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@665490a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:12:30, skipping insertion in model container [2019-11-06 19:12:30,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:12:30" (3/3) ... [2019-11-06 19:12:30,675 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label05.c [2019-11-06 19:12:30,687 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:12:30,697 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:12:30,709 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:12:30,746 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:12:30,746 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:12:30,748 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:12:30,748 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:12:30,748 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:12:30,750 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:12:30,750 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:12:30,750 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:12:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:12:30,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-06 19:12:30,785 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:30,787 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:30,789 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:30,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:30,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1411665610, now seen corresponding path program 1 times [2019-11-06 19:12:30,804 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:30,805 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879617636] [2019-11-06 19:12:30,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:31,199 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 19:12:31,200 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879617636] [2019-11-06 19:12:31,201 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:31,202 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:12:31,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571622593] [2019-11-06 19:12:31,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:12:31,211 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:31,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:12:31,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:12:31,228 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-11-06 19:12:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:33,548 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-11-06 19:12:33,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:12:33,550 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2019-11-06 19:12:33,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:33,576 INFO L225 Difference]: With dead ends: 886 [2019-11-06 19:12:33,576 INFO L226 Difference]: Without dead ends: 564 [2019-11-06 19:12:33,588 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-06 19:12:33,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-11-06 19:12:33,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-11-06 19:12:33,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-11-06 19:12:33,695 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 69 [2019-11-06 19:12:33,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:33,696 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-11-06 19:12:33,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:12:33,696 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-11-06 19:12:33,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-06 19:12:33,704 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:33,704 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, 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, 1, 1, 1, 1, 1] [2019-11-06 19:12:33,705 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:33,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:33,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1477947551, now seen corresponding path program 1 times [2019-11-06 19:12:33,705 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:33,706 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918274087] [2019-11-06 19:12:33,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:34,041 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918274087] [2019-11-06 19:12:34,041 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:34,042 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:12:34,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238134453] [2019-11-06 19:12:34,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:12:34,044 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:34,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:12:34,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:12:34,045 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-11-06 19:12:36,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:36,744 INFO L93 Difference]: Finished difference Result 2246 states and 3775 transitions. [2019-11-06 19:12:36,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:12:36,745 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 138 [2019-11-06 19:12:36,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:36,767 INFO L225 Difference]: With dead ends: 2246 [2019-11-06 19:12:36,768 INFO L226 Difference]: Without dead ends: 1694 [2019-11-06 19:12:36,772 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:12:36,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2019-11-06 19:12:36,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1128. [2019-11-06 19:12:36,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1128 states. [2019-11-06 19:12:36,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1732 transitions. [2019-11-06 19:12:36,895 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1732 transitions. Word has length 138 [2019-11-06 19:12:36,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:36,898 INFO L462 AbstractCegarLoop]: Abstraction has 1128 states and 1732 transitions. [2019-11-06 19:12:36,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:12:36,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1732 transitions. [2019-11-06 19:12:36,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-06 19:12:36,909 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:36,909 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, 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, 1, 1, 1, 1, 1, 1] [2019-11-06 19:12:36,909 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:36,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:36,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1280489606, now seen corresponding path program 1 times [2019-11-06 19:12:36,910 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:36,911 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121128961] [2019-11-06 19:12:36,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:37,188 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121128961] [2019-11-06 19:12:37,188 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:37,189 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:12:37,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363587424] [2019-11-06 19:12:37,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:12:37,192 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:37,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:12:37,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:12:37,193 INFO L87 Difference]: Start difference. First operand 1128 states and 1732 transitions. Second operand 8 states. [2019-11-06 19:12:39,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:39,118 INFO L93 Difference]: Finished difference Result 2856 states and 4565 transitions. [2019-11-06 19:12:39,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:12:39,119 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 139 [2019-11-06 19:12:39,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:39,132 INFO L225 Difference]: With dead ends: 2856 [2019-11-06 19:12:39,133 INFO L226 Difference]: Without dead ends: 1734 [2019-11-06 19:12:39,138 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:12:39,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2019-11-06 19:12:39,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1706. [2019-11-06 19:12:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1706 states. [2019-11-06 19:12:39,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2406 transitions. [2019-11-06 19:12:39,216 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2406 transitions. Word has length 139 [2019-11-06 19:12:39,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:39,218 INFO L462 AbstractCegarLoop]: Abstraction has 1706 states and 2406 transitions. [2019-11-06 19:12:39,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:12:39,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2406 transitions. [2019-11-06 19:12:39,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-06 19:12:39,220 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:39,221 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:12:39,221 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:39,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:39,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1200752790, now seen corresponding path program 1 times [2019-11-06 19:12:39,222 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:39,223 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851035918] [2019-11-06 19:12:39,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:39,465 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851035918] [2019-11-06 19:12:39,465 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:39,465 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:12:39,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330631904] [2019-11-06 19:12:39,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:12:39,468 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:39,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:12:39,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:12:39,468 INFO L87 Difference]: Start difference. First operand 1706 states and 2406 transitions. Second operand 8 states. [2019-11-06 19:12:41,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:41,420 INFO L93 Difference]: Finished difference Result 4296 states and 6639 transitions. [2019-11-06 19:12:41,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:12:41,420 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 141 [2019-11-06 19:12:41,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:41,446 INFO L225 Difference]: With dead ends: 4296 [2019-11-06 19:12:41,446 INFO L226 Difference]: Without dead ends: 2596 [2019-11-06 19:12:41,451 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:12:41,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2019-11-06 19:12:41,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 2094. [2019-11-06 19:12:41,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2019-11-06 19:12:41,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 2889 transitions. [2019-11-06 19:12:41,570 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 2889 transitions. Word has length 141 [2019-11-06 19:12:41,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:41,572 INFO L462 AbstractCegarLoop]: Abstraction has 2094 states and 2889 transitions. [2019-11-06 19:12:41,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:12:41,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 2889 transitions. [2019-11-06 19:12:41,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-11-06 19:12:41,576 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:41,577 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:12:41,577 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:41,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:41,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1200458230, now seen corresponding path program 1 times [2019-11-06 19:12:41,578 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:41,578 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271726996] [2019-11-06 19:12:41,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:12:41,824 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271726996] [2019-11-06 19:12:41,824 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637601398] [2019-11-06 19:12:41,824 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 19:12:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:41,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:12:41,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:12:42,107 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:12:42,108 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:12:42,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829415142] [2019-11-06 19:12:42,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:12:42,109 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:42,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:12:42,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:42,110 INFO L87 Difference]: Start difference. First operand 2094 states and 2889 transitions. Second operand 3 states. [2019-11-06 19:12:42,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:42,964 INFO L93 Difference]: Finished difference Result 4918 states and 6767 transitions. [2019-11-06 19:12:42,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:12:42,964 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 225 [2019-11-06 19:12:42,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:42,979 INFO L225 Difference]: With dead ends: 4918 [2019-11-06 19:12:42,979 INFO L226 Difference]: Without dead ends: 2830 [2019-11-06 19:12:42,985 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:42,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2019-11-06 19:12:43,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 2644. [2019-11-06 19:12:43,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2644 states. [2019-11-06 19:12:43,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 3578 transitions. [2019-11-06 19:12:43,072 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 3578 transitions. Word has length 225 [2019-11-06 19:12:43,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:43,074 INFO L462 AbstractCegarLoop]: Abstraction has 2644 states and 3578 transitions. [2019-11-06 19:12:43,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:12:43,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 3578 transitions. [2019-11-06 19:12:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2019-11-06 19:12:43,082 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:43,082 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 19:12:43,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:43,288 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:43,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:43,288 INFO L82 PathProgramCache]: Analyzing trace with hash -398735987, now seen corresponding path program 1 times [2019-11-06 19:12:43,289 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:43,289 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526497213] [2019-11-06 19:12:43,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 220 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:12:43,822 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526497213] [2019-11-06 19:12:43,822 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098672880] [2019-11-06 19:12:43,822 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 19:12:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:43,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:12:43,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-06 19:12:44,047 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:12:44,047 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 14 [2019-11-06 19:12:44,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718534012] [2019-11-06 19:12:44,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:12:44,048 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:44,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:12:44,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:12:44,049 INFO L87 Difference]: Start difference. First operand 2644 states and 3578 transitions. Second operand 3 states. [2019-11-06 19:12:44,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:44,837 INFO L93 Difference]: Finished difference Result 5100 states and 6954 transitions. [2019-11-06 19:12:44,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:12:44,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 280 [2019-11-06 19:12:44,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:44,864 INFO L225 Difference]: With dead ends: 5100 [2019-11-06 19:12:44,864 INFO L226 Difference]: Without dead ends: 2644 [2019-11-06 19:12:44,870 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:12:44,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2019-11-06 19:12:44,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2278. [2019-11-06 19:12:44,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2278 states. [2019-11-06 19:12:44,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 3024 transitions. [2019-11-06 19:12:44,939 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 3024 transitions. Word has length 280 [2019-11-06 19:12:44,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:44,939 INFO L462 AbstractCegarLoop]: Abstraction has 2278 states and 3024 transitions. [2019-11-06 19:12:44,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:12:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 3024 transitions. [2019-11-06 19:12:44,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2019-11-06 19:12:44,950 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:44,950 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 19:12:45,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:45,154 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:45,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:45,155 INFO L82 PathProgramCache]: Analyzing trace with hash 451455961, now seen corresponding path program 1 times [2019-11-06 19:12:45,155 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:45,155 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187378764] [2019-11-06 19:12:45,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 228 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:12:45,804 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187378764] [2019-11-06 19:12:45,805 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088956494] [2019-11-06 19:12:45,805 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 19:12:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:45,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:12:45,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:46,004 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:12:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 19:12:46,181 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:12:46,181 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2019-11-06 19:12:46,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392417974] [2019-11-06 19:12:46,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:12:46,182 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:46,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:12:46,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:12:46,183 INFO L87 Difference]: Start difference. First operand 2278 states and 3024 transitions. Second operand 5 states. [2019-11-06 19:12:47,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:47,462 INFO L93 Difference]: Finished difference Result 4396 states and 5902 transitions. [2019-11-06 19:12:47,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:12:47,463 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2019-11-06 19:12:47,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:47,474 INFO L225 Difference]: With dead ends: 4396 [2019-11-06 19:12:47,475 INFO L226 Difference]: Without dead ends: 2308 [2019-11-06 19:12:47,480 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:12:47,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2019-11-06 19:12:47,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2288. [2019-11-06 19:12:47,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2288 states. [2019-11-06 19:12:47,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 2998 transitions. [2019-11-06 19:12:47,544 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 2998 transitions. Word has length 334 [2019-11-06 19:12:47,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:47,545 INFO L462 AbstractCegarLoop]: Abstraction has 2288 states and 2998 transitions. [2019-11-06 19:12:47,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:12:47,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 2998 transitions. [2019-11-06 19:12:47,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2019-11-06 19:12:47,558 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:47,559 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:47,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:47,763 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:47,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:47,763 INFO L82 PathProgramCache]: Analyzing trace with hash -614545183, now seen corresponding path program 1 times [2019-11-06 19:12:47,763 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:47,763 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232016983] [2019-11-06 19:12:47,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 196 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 19:12:49,409 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232016983] [2019-11-06 19:12:49,409 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493204662] [2019-11-06 19:12:49,409 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 19:12:49,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:49,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 19:12:49,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:49,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:12:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 350 proven. 53 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 19:12:49,896 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:12:49,897 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-11-06 19:12:49,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430922062] [2019-11-06 19:12:49,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:12:49,898 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:49,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:12:49,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:12:49,898 INFO L87 Difference]: Start difference. First operand 2288 states and 2998 transitions. Second operand 16 states. [2019-11-06 19:12:53,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:53,839 INFO L93 Difference]: Finished difference Result 4512 states and 5985 transitions. [2019-11-06 19:12:53,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 19:12:53,840 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 418 [2019-11-06 19:12:53,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:53,850 INFO L225 Difference]: With dead ends: 4512 [2019-11-06 19:12:53,850 INFO L226 Difference]: Without dead ends: 2363 [2019-11-06 19:12:53,856 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 19:12:53,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2019-11-06 19:12:53,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2278. [2019-11-06 19:12:53,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2278 states. [2019-11-06 19:12:53,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 2741 transitions. [2019-11-06 19:12:53,919 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 2741 transitions. Word has length 418 [2019-11-06 19:12:53,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:53,919 INFO L462 AbstractCegarLoop]: Abstraction has 2278 states and 2741 transitions. [2019-11-06 19:12:53,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 19:12:53,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 2741 transitions. [2019-11-06 19:12:53,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2019-11-06 19:12:53,934 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:53,935 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 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 19:12:54,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:54,139 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:54,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:54,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1636558626, now seen corresponding path program 1 times [2019-11-06 19:12:54,140 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:54,141 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2560632] [2019-11-06 19:12:54,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 474 proven. 111 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-06 19:12:54,918 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2560632] [2019-11-06 19:12:54,918 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352476031] [2019-11-06 19:12:54,918 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 19:12:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:55,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:12:55,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 736 proven. 2 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-06 19:12:55,338 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:12:55,338 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-11-06 19:12:55,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854078249] [2019-11-06 19:12:55,340 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:12:55,340 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:55,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:12:55,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:12:55,341 INFO L87 Difference]: Start difference. First operand 2278 states and 2741 transitions. Second operand 9 states. [2019-11-06 19:12:57,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:57,404 INFO L93 Difference]: Finished difference Result 4926 states and 6003 transitions. [2019-11-06 19:12:57,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:12:57,405 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 553 [2019-11-06 19:12:57,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:57,418 INFO L225 Difference]: With dead ends: 4926 [2019-11-06 19:12:57,418 INFO L226 Difference]: Without dead ends: 2838 [2019-11-06 19:12:57,423 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 566 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:12:57,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2019-11-06 19:12:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2652. [2019-11-06 19:12:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2652 states. [2019-11-06 19:12:57,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 3110 transitions. [2019-11-06 19:12:57,479 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 3110 transitions. Word has length 553 [2019-11-06 19:12:57,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:57,480 INFO L462 AbstractCegarLoop]: Abstraction has 2652 states and 3110 transitions. [2019-11-06 19:12:57,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:12:57,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 3110 transitions. [2019-11-06 19:12:57,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 638 [2019-11-06 19:12:57,499 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:57,500 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 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] [2019-11-06 19:12:57,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:57,703 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:57,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:57,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1784161946, now seen corresponding path program 1 times [2019-11-06 19:12:57,704 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:57,704 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532452815] [2019-11-06 19:12:57,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:59,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 628 proven. 119 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2019-11-06 19:12:59,241 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532452815] [2019-11-06 19:12:59,241 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154157099] [2019-11-06 19:12:59,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:12:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:59,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 19:12:59,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:59,475 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:13:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 969 proven. 2 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2019-11-06 19:13:00,303 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:13:00,304 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-11-06 19:13:00,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207444711] [2019-11-06 19:13:00,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:13:00,310 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:00,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:13:00,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:13:00,311 INFO L87 Difference]: Start difference. First operand 2652 states and 3110 transitions. Second operand 12 states. [2019-11-06 19:13:02,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:02,707 INFO L93 Difference]: Finished difference Result 5410 states and 6378 transitions. [2019-11-06 19:13:02,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:13:02,707 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 637 [2019-11-06 19:13:02,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:02,719 INFO L225 Difference]: With dead ends: 5410 [2019-11-06 19:13:02,719 INFO L226 Difference]: Without dead ends: 2907 [2019-11-06 19:13:02,725 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 656 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 19:13:02,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2907 states. [2019-11-06 19:13:02,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2907 to 2654. [2019-11-06 19:13:02,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2019-11-06 19:13:02,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3022 transitions. [2019-11-06 19:13:02,782 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3022 transitions. Word has length 637 [2019-11-06 19:13:02,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:02,782 INFO L462 AbstractCegarLoop]: Abstraction has 2654 states and 3022 transitions. [2019-11-06 19:13:02,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:13:02,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3022 transitions. [2019-11-06 19:13:02,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2019-11-06 19:13:02,791 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:02,792 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2019-11-06 19:13:02,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:02,997 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:02,997 INFO L82 PathProgramCache]: Analyzing trace with hash -816051694, now seen corresponding path program 2 times [2019-11-06 19:13:02,998 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:03,001 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019264115] [2019-11-06 19:13:03,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:03,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat