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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:05:21,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:05:21,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:05:21,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:05:21,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:05:21,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:05:21,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:05:21,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:05:21,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:05:21,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:05:21,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:05:21,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:05:21,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:05:21,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:05:21,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:05:21,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:05:21,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:05:21,781 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:05:21,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:05:21,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:05:21,783 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 [2019-10-15 00:05:21,814 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:05:21,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:05:21,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:05:21,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:05:21,819 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:05:21,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:05:21,820 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:05:21,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:05:21,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:05:21,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:05:21,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:05:21,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:05:21,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:05:21,821 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:05:21,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:05:21,823 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:05:21,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:05:21,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:05:21,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:05:21,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:05:21,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:05:21,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:05:21,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:05:21,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:05:21,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:05:21,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:05:21,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:05:21,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:05:21,826 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:05:22,100 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:05:22,117 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:05:22,122 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:05:22,123 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:05:22,124 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:05:22,125 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label05.c [2019-10-15 00:05:22,201 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23ffb42bd/54acbc4ba70e430ebecc8e19c34acc64/FLAG5f7c54735 [2019-10-15 00:05:22,752 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:05:22,758 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label05.c [2019-10-15 00:05:22,776 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23ffb42bd/54acbc4ba70e430ebecc8e19c34acc64/FLAG5f7c54735 [2019-10-15 00:05:22,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23ffb42bd/54acbc4ba70e430ebecc8e19c34acc64 [2019-10-15 00:05:23,006 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:05:23,007 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:05:23,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:05:23,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:05:23,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:05:23,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:05:22" (1/1) ... [2019-10-15 00:05:23,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75485a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23, skipping insertion in model container [2019-10-15 00:05:23,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:05:22" (1/1) ... [2019-10-15 00:05:23,023 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:05:23,099 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:05:23,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:05:23,770 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:05:23,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:05:23,920 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:05:23,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23 WrapperNode [2019-10-15 00:05:23,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:05:23,921 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:05:23,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:05:23,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:05:23,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23" (1/1) ... [2019-10-15 00:05:23,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23" (1/1) ... [2019-10-15 00:05:23,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23" (1/1) ... [2019-10-15 00:05:23,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23" (1/1) ... [2019-10-15 00:05:24,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23" (1/1) ... [2019-10-15 00:05:24,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23" (1/1) ... [2019-10-15 00:05:24,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23" (1/1) ... [2019-10-15 00:05:24,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:05:24,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:05:24,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:05:24,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:05:24,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23" (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 [2019-10-15 00:05:24,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:05:24,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:05:24,123 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:05:24,123 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:05:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:05:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:05:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:05:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:05:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:05:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:05:24,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:05:25,590 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:05:25,590 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:05:25,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:05:25 BoogieIcfgContainer [2019-10-15 00:05:25,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:05:25,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:05:25,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:05:25,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:05:25,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:05:22" (1/3) ... [2019-10-15 00:05:25,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14fa9f24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:05:25, skipping insertion in model container [2019-10-15 00:05:25,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23" (2/3) ... [2019-10-15 00:05:25,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14fa9f24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:05:25, skipping insertion in model container [2019-10-15 00:05:25,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:05:25" (3/3) ... [2019-10-15 00:05:25,601 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label05.c [2019-10-15 00:05:25,611 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:05:25,619 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:05:25,631 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:05:25,660 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:05:25,660 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:05:25,661 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:05:25,661 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:05:25,661 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:05:25,661 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:05:25,661 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:05:25,664 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:05:25,701 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-15 00:05:25,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-15 00:05:25,713 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:25,714 INFO L380 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] [2019-10-15 00:05:25,715 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:25,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:25,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1411665610, now seen corresponding path program 1 times [2019-10-15 00:05:25,729 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:25,729 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988364622] [2019-10-15 00:05:25,730 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:25,730 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:25,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:26,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988364622] [2019-10-15 00:05:26,096 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:26,097 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:05:26,097 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822673233] [2019-10-15 00:05:26,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:05:26,105 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:26,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:05:26,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:05:26,123 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-15 00:05:27,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:27,399 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-15 00:05:27,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:05:27,401 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2019-10-15 00:05:27,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:27,419 INFO L225 Difference]: With dead ends: 688 [2019-10-15 00:05:27,419 INFO L226 Difference]: Without dead ends: 372 [2019-10-15 00:05:27,427 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:05:27,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-15 00:05:27,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-15 00:05:27,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-15 00:05:27,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-10-15 00:05:27,512 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 69 [2019-10-15 00:05:27,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:27,512 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-10-15 00:05:27,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:05:27,513 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-10-15 00:05:27,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-15 00:05:27,519 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:27,519 INFO L380 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] [2019-10-15 00:05:27,520 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:27,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:27,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1477947551, now seen corresponding path program 1 times [2019-10-15 00:05:27,521 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:27,521 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524000318] [2019-10-15 00:05:27,521 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:27,521 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:27,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:27,775 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524000318] [2019-10-15 00:05:27,775 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:27,775 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:05:27,775 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805608433] [2019-10-15 00:05:27,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:05:27,778 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:27,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:05:27,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:05:27,778 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-10-15 00:05:29,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:29,257 INFO L93 Difference]: Finished difference Result 1122 states and 1837 transitions. [2019-10-15 00:05:29,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:05:29,258 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2019-10-15 00:05:29,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:29,264 INFO L225 Difference]: With dead ends: 1122 [2019-10-15 00:05:29,264 INFO L226 Difference]: Without dead ends: 756 [2019-10-15 00:05:29,266 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:05:29,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2019-10-15 00:05:29,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 752. [2019-10-15 00:05:29,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2019-10-15 00:05:29,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1190 transitions. [2019-10-15 00:05:29,327 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1190 transitions. Word has length 138 [2019-10-15 00:05:29,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:29,328 INFO L462 AbstractCegarLoop]: Abstraction has 752 states and 1190 transitions. [2019-10-15 00:05:29,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:05:29,328 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1190 transitions. [2019-10-15 00:05:29,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-15 00:05:29,334 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:29,334 INFO L380 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] [2019-10-15 00:05:29,334 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:29,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:29,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1280489606, now seen corresponding path program 1 times [2019-10-15 00:05:29,335 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:29,336 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772359136] [2019-10-15 00:05:29,336 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:29,336 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:29,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:29,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772359136] [2019-10-15 00:05:29,481 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:29,481 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:05:29,482 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854018158] [2019-10-15 00:05:29,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:05:29,483 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:29,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:05:29,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:05:29,484 INFO L87 Difference]: Start difference. First operand 752 states and 1190 transitions. Second operand 5 states. [2019-10-15 00:05:30,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:30,883 INFO L93 Difference]: Finished difference Result 1904 states and 3099 transitions. [2019-10-15 00:05:30,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:05:30,885 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2019-10-15 00:05:30,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:30,894 INFO L225 Difference]: With dead ends: 1904 [2019-10-15 00:05:30,895 INFO L226 Difference]: Without dead ends: 1158 [2019-10-15 00:05:30,897 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:05:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2019-10-15 00:05:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1138. [2019-10-15 00:05:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1138 states. [2019-10-15 00:05:30,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1632 transitions. [2019-10-15 00:05:30,958 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1632 transitions. Word has length 139 [2019-10-15 00:05:30,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:30,959 INFO L462 AbstractCegarLoop]: Abstraction has 1138 states and 1632 transitions. [2019-10-15 00:05:30,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:05:30,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1632 transitions. [2019-10-15 00:05:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-15 00:05:30,962 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:30,962 INFO L380 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] [2019-10-15 00:05:30,963 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:30,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:30,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1200752790, now seen corresponding path program 1 times [2019-10-15 00:05:30,963 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:30,964 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450587502] [2019-10-15 00:05:30,964 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:30,964 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:30,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:31,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450587502] [2019-10-15 00:05:31,130 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:31,130 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:05:31,131 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362327899] [2019-10-15 00:05:31,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:05:31,133 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:31,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:05:31,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:05:31,134 INFO L87 Difference]: Start difference. First operand 1138 states and 1632 transitions. Second operand 5 states. [2019-10-15 00:05:32,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:32,470 INFO L93 Difference]: Finished difference Result 2880 states and 4162 transitions. [2019-10-15 00:05:32,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:05:32,471 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2019-10-15 00:05:32,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:32,488 INFO L225 Difference]: With dead ends: 2880 [2019-10-15 00:05:32,488 INFO L226 Difference]: Without dead ends: 1748 [2019-10-15 00:05:32,494 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:05:32,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2019-10-15 00:05:32,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1326. [2019-10-15 00:05:32,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1326 states. [2019-10-15 00:05:32,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1863 transitions. [2019-10-15 00:05:32,589 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1863 transitions. Word has length 141 [2019-10-15 00:05:32,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:32,591 INFO L462 AbstractCegarLoop]: Abstraction has 1326 states and 1863 transitions. [2019-10-15 00:05:32,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:05:32,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1863 transitions. [2019-10-15 00:05:32,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-10-15 00:05:32,601 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:32,601 INFO L380 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] [2019-10-15 00:05:32,601 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:32,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:32,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1200458230, now seen corresponding path program 1 times [2019-10-15 00:05:32,602 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:32,603 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14729108] [2019-10-15 00:05:32,603 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:32,603 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:32,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-15 00:05:32,861 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14729108] [2019-10-15 00:05:32,861 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:32,862 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:05:32,862 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665483728] [2019-10-15 00:05:32,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:05:32,863 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:32,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:05:32,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:05:32,864 INFO L87 Difference]: Start difference. First operand 1326 states and 1863 transitions. Second operand 4 states. [2019-10-15 00:05:34,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:34,209 INFO L93 Difference]: Finished difference Result 4126 states and 5834 transitions. [2019-10-15 00:05:34,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:05:34,210 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2019-10-15 00:05:34,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:34,223 INFO L225 Difference]: With dead ends: 4126 [2019-10-15 00:05:34,223 INFO L226 Difference]: Without dead ends: 2806 [2019-10-15 00:05:34,227 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:05:34,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2019-10-15 00:05:34,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2258. [2019-10-15 00:05:34,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2258 states. [2019-10-15 00:05:34,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2258 states to 2258 states and 3058 transitions. [2019-10-15 00:05:34,297 INFO L78 Accepts]: Start accepts. Automaton has 2258 states and 3058 transitions. Word has length 225 [2019-10-15 00:05:34,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:34,298 INFO L462 AbstractCegarLoop]: Abstraction has 2258 states and 3058 transitions. [2019-10-15 00:05:34,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:05:34,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2258 states and 3058 transitions. [2019-10-15 00:05:34,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2019-10-15 00:05:34,308 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:34,309 INFO L380 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] [2019-10-15 00:05:34,309 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:34,310 INFO L82 PathProgramCache]: Analyzing trace with hash 451455961, now seen corresponding path program 1 times [2019-10-15 00:05:34,310 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:34,310 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377226329] [2019-10-15 00:05:34,310 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:34,310 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:34,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 230 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:34,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377226329] [2019-10-15 00:05:34,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391188489] [2019-10-15 00:05:34,672 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 [2019-10-15 00:05:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:34,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:05:34,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:05:34,923 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 00:05:35,134 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:05:35,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:35,327 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:35,330 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:35,330 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:35,348 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:35,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 124 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:05:35,706 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:05:35,707 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 13 [2019-10-15 00:05:35,707 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812818503] [2019-10-15 00:05:35,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:05:35,708 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:35,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:05:35,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-15 00:05:35,709 INFO L87 Difference]: Start difference. First operand 2258 states and 3058 transitions. Second operand 5 states. [2019-10-15 00:05:37,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:37,003 INFO L93 Difference]: Finished difference Result 4360 states and 5977 transitions. [2019-10-15 00:05:37,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:05:37,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2019-10-15 00:05:37,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:37,015 INFO L225 Difference]: With dead ends: 4360 [2019-10-15 00:05:37,016 INFO L226 Difference]: Without dead ends: 2290 [2019-10-15 00:05:37,022 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 664 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2019-10-15 00:05:37,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2019-10-15 00:05:37,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 2270. [2019-10-15 00:05:37,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2270 states. [2019-10-15 00:05:37,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 3040 transitions. [2019-10-15 00:05:37,122 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 3040 transitions. Word has length 334 [2019-10-15 00:05:37,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:37,123 INFO L462 AbstractCegarLoop]: Abstraction has 2270 states and 3040 transitions. [2019-10-15 00:05:37,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:05:37,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 3040 transitions. [2019-10-15 00:05:37,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2019-10-15 00:05:37,135 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:37,136 INFO L380 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] [2019-10-15 00:05:37,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:05:37,348 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:37,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:37,349 INFO L82 PathProgramCache]: Analyzing trace with hash -614545183, now seen corresponding path program 1 times [2019-10-15 00:05:37,349 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:37,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947386522] [2019-10-15 00:05:37,350 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:37,350 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:37,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 272 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:05:38,272 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947386522] [2019-10-15 00:05:38,272 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080663188] [2019-10-15 00:05:38,272 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 [2019-10-15 00:05:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:38,396 INFO L256 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-15 00:05:38,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:05:38,482 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 00:05:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 350 proven. 53 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 00:05:38,876 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:05:38,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 00:05:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 194 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:05:39,496 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1078925120] [2019-10-15 00:05:39,502 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 419 [2019-10-15 00:05:39,560 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:05:39,560 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)