/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:33:28,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:33:28,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:33:28,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:33:28,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:33:28,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:33:28,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:33:28,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:33:28,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:33:28,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:33:28,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:33:28,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:33:28,706 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:33:28,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:33:28,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:33:28,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:33:28,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:33:28,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:33:28,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:33:28,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:33:28,721 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 22:33:28,736 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:33:28,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:33:28,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:33:28,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:33:28,738 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:33:28,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:33:28,738 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:33:28,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:33:28,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:33:28,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:33:28,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:33:28,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:33:28,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:33:28,740 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:33:28,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:33:28,740 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:33:28,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:33:28,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:33:28,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:33:28,741 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:33:28,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:33:28,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:33:28,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:33:28,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:33:28,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:33:28,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:33:28,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:33:28,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:33:28,743 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 [2019-11-06 22:33:29,019 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:33:29,032 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:33:29,035 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:33:29,036 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:33:29,037 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:33:29,038 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label12.c [2019-11-06 22:33:29,110 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66c86949c/08c51d9129354bd3aef05dcb91ee71aa/FLAGdac7e8078 [2019-11-06 22:33:29,679 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:33:29,679 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label12.c [2019-11-06 22:33:29,694 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66c86949c/08c51d9129354bd3aef05dcb91ee71aa/FLAGdac7e8078 [2019-11-06 22:33:29,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66c86949c/08c51d9129354bd3aef05dcb91ee71aa [2019-11-06 22:33:30,008 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:33:30,010 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:33:30,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:33:30,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:33:30,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:33:30,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:33:29" (1/1) ... [2019-11-06 22:33:30,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40d0f80b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:30, skipping insertion in model container [2019-11-06 22:33:30,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:33:29" (1/1) ... [2019-11-06 22:33:30,026 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:33:30,088 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:33:30,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:33:30,577 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:33:30,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:33:30,753 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:33:30,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:30 WrapperNode [2019-11-06 22:33:30,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:33:30,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:33:30,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:33:30,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:33:30,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:30" (1/1) ... [2019-11-06 22:33:30,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:30" (1/1) ... [2019-11-06 22:33:30,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:30" (1/1) ... [2019-11-06 22:33:30,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:30" (1/1) ... [2019-11-06 22:33:30,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:30" (1/1) ... [2019-11-06 22:33:30,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:30" (1/1) ... [2019-11-06 22:33:30,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:30" (1/1) ... [2019-11-06 22:33:30,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:33:30,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:33:30,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:33:30,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:33:30,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:30" (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 22:33:30,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:33:30,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:33:30,928 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:33:30,928 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:33:30,928 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:33:30,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:33:30,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:33:30,930 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:33:30,930 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:33:30,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:33:30,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:33:32,026 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:33:32,027 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:33:32,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:33:32 BoogieIcfgContainer [2019-11-06 22:33:32,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:33:32,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:33:32,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:33:32,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:33:32,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:33:29" (1/3) ... [2019-11-06 22:33:32,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d4cf87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:33:32, skipping insertion in model container [2019-11-06 22:33:32,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:30" (2/3) ... [2019-11-06 22:33:32,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d4cf87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:33:32, skipping insertion in model container [2019-11-06 22:33:32,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:33:32" (3/3) ... [2019-11-06 22:33:32,036 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label12.c [2019-11-06 22:33:32,046 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:33:32,054 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:33:32,065 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:33:32,094 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:33:32,094 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:33:32,096 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:33:32,096 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:33:32,096 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:33:32,096 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:33:32,096 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:33:32,097 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:33:32,132 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-11-06 22:33:32,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 22:33:32,153 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:32,154 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:33:32,156 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:32,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1251139866, now seen corresponding path program 1 times [2019-11-06 22:33:32,174 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:32,175 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029574928] [2019-11-06 22:33:32,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:32,680 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 22:33:32,681 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029574928] [2019-11-06 22:33:32,682 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:33:32,682 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:33:32,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120903222] [2019-11-06 22:33:32,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:33:32,693 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:32,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:33:32,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:33:32,714 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-11-06 22:33:33,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:33,627 INFO L93 Difference]: Finished difference Result 618 states and 1056 transitions. [2019-11-06 22:33:33,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:33:33,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2019-11-06 22:33:33,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:33,656 INFO L225 Difference]: With dead ends: 618 [2019-11-06 22:33:33,657 INFO L226 Difference]: Without dead ends: 320 [2019-11-06 22:33:33,668 INFO L630 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 [2019-11-06 22:33:33,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-11-06 22:33:33,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-11-06 22:33:33,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-11-06 22:33:33,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 465 transitions. [2019-11-06 22:33:33,773 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 465 transitions. Word has length 124 [2019-11-06 22:33:33,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:33,774 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 465 transitions. [2019-11-06 22:33:33,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:33:33,775 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 465 transitions. [2019-11-06 22:33:33,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 22:33:33,779 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:33,780 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:33:33,780 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:33,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:33,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1267937665, now seen corresponding path program 1 times [2019-11-06 22:33:33,781 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:33,781 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257773768] [2019-11-06 22:33:33,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:34,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:34,065 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257773768] [2019-11-06 22:33:34,065 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:33:34,065 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:33:34,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408002855] [2019-11-06 22:33:34,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:33:34,068 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:34,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:33:34,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:33:34,069 INFO L87 Difference]: Start difference. First operand 320 states and 465 transitions. Second operand 5 states. [2019-11-06 22:33:34,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:34,757 INFO L93 Difference]: Finished difference Result 721 states and 1089 transitions. [2019-11-06 22:33:34,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:33:34,760 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2019-11-06 22:33:34,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:34,763 INFO L225 Difference]: With dead ends: 721 [2019-11-06 22:33:34,763 INFO L226 Difference]: Without dead ends: 320 [2019-11-06 22:33:34,764 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:33:34,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-11-06 22:33:34,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-11-06 22:33:34,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-11-06 22:33:34,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 461 transitions. [2019-11-06 22:33:34,784 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 461 transitions. Word has length 132 [2019-11-06 22:33:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:34,785 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 461 transitions. [2019-11-06 22:33:34,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:33:34,785 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 461 transitions. [2019-11-06 22:33:34,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-06 22:33:34,788 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:34,788 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:33:34,789 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:34,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:34,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1536784181, now seen corresponding path program 1 times [2019-11-06 22:33:34,789 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:34,790 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851662568] [2019-11-06 22:33:34,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:35,070 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851662568] [2019-11-06 22:33:35,070 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:33:35,070 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:33:35,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635450876] [2019-11-06 22:33:35,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:33:35,071 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:35,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:33:35,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:33:35,072 INFO L87 Difference]: Start difference. First operand 320 states and 461 transitions. Second operand 5 states. [2019-11-06 22:33:35,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:35,808 INFO L93 Difference]: Finished difference Result 717 states and 1075 transitions. [2019-11-06 22:33:35,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:33:35,811 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 138 [2019-11-06 22:33:35,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:35,814 INFO L225 Difference]: With dead ends: 717 [2019-11-06 22:33:35,814 INFO L226 Difference]: Without dead ends: 320 [2019-11-06 22:33:35,815 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:33:35,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-11-06 22:33:35,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-11-06 22:33:35,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-11-06 22:33:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 455 transitions. [2019-11-06 22:33:35,829 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 455 transitions. Word has length 138 [2019-11-06 22:33:35,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:35,829 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 455 transitions. [2019-11-06 22:33:35,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:33:35,830 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 455 transitions. [2019-11-06 22:33:35,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-06 22:33:35,833 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:35,833 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:33:35,833 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:35,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:35,834 INFO L82 PathProgramCache]: Analyzing trace with hash -564169218, now seen corresponding path program 1 times [2019-11-06 22:33:35,834 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:35,834 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10358338] [2019-11-06 22:33:35,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:35,950 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10358338] [2019-11-06 22:33:35,950 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:33:35,950 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:33:35,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617647285] [2019-11-06 22:33:35,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:33:35,951 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:35,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:33:35,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:33:35,952 INFO L87 Difference]: Start difference. First operand 320 states and 455 transitions. Second operand 6 states. [2019-11-06 22:33:36,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:36,782 INFO L93 Difference]: Finished difference Result 951 states and 1383 transitions. [2019-11-06 22:33:36,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:33:36,783 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2019-11-06 22:33:36,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:36,786 INFO L225 Difference]: With dead ends: 951 [2019-11-06 22:33:36,787 INFO L226 Difference]: Without dead ends: 637 [2019-11-06 22:33:36,788 INFO L630 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 [2019-11-06 22:33:36,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2019-11-06 22:33:36,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 626. [2019-11-06 22:33:36,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-06 22:33:36,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 871 transitions. [2019-11-06 22:33:36,815 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 871 transitions. Word has length 146 [2019-11-06 22:33:36,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:36,816 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 871 transitions. [2019-11-06 22:33:36,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:33:36,816 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 871 transitions. [2019-11-06 22:33:36,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-06 22:33:36,820 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:36,821 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:33:36,821 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:36,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:36,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1274835258, now seen corresponding path program 1 times [2019-11-06 22:33:36,822 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:36,822 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343659857] [2019-11-06 22:33:36,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:37,047 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343659857] [2019-11-06 22:33:37,047 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:33:37,047 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:33:37,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632873722] [2019-11-06 22:33:37,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:33:37,049 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:37,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:33:37,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:33:37,050 INFO L87 Difference]: Start difference. First operand 626 states and 871 transitions. Second operand 5 states. [2019-11-06 22:33:37,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:37,723 INFO L93 Difference]: Finished difference Result 1330 states and 1903 transitions. [2019-11-06 22:33:37,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:33:37,723 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2019-11-06 22:33:37,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:37,727 INFO L225 Difference]: With dead ends: 1330 [2019-11-06 22:33:37,728 INFO L226 Difference]: Without dead ends: 626 [2019-11-06 22:33:37,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:33:37,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-11-06 22:33:37,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-11-06 22:33:37,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-06 22:33:37,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 859 transitions. [2019-11-06 22:33:37,750 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 859 transitions. Word has length 148 [2019-11-06 22:33:37,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:37,750 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 859 transitions. [2019-11-06 22:33:37,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:33:37,750 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 859 transitions. [2019-11-06 22:33:37,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-06 22:33:37,753 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:37,753 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:33:37,754 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:37,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:37,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1427723146, now seen corresponding path program 1 times [2019-11-06 22:33:37,754 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:37,755 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037208114] [2019-11-06 22:33:37,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:37,947 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037208114] [2019-11-06 22:33:37,947 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:33:37,948 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:33:37,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611572734] [2019-11-06 22:33:37,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:33:37,949 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:37,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:33:37,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:33:37,949 INFO L87 Difference]: Start difference. First operand 626 states and 859 transitions. Second operand 5 states. [2019-11-06 22:33:38,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:38,643 INFO L93 Difference]: Finished difference Result 1332 states and 1878 transitions. [2019-11-06 22:33:38,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:33:38,644 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2019-11-06 22:33:38,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:38,648 INFO L225 Difference]: With dead ends: 1332 [2019-11-06 22:33:38,648 INFO L226 Difference]: Without dead ends: 626 [2019-11-06 22:33:38,650 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:33:38,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-11-06 22:33:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-11-06 22:33:38,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-06 22:33:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 843 transitions. [2019-11-06 22:33:38,673 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 843 transitions. Word has length 150 [2019-11-06 22:33:38,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:38,673 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 843 transitions. [2019-11-06 22:33:38,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:33:38,673 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 843 transitions. [2019-11-06 22:33:38,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-06 22:33:38,677 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:38,677 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:33:38,677 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:38,678 INFO L82 PathProgramCache]: Analyzing trace with hash 392356590, now seen corresponding path program 1 times [2019-11-06 22:33:38,678 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:38,681 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744913038] [2019-11-06 22:33:38,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:38,788 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:38,789 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744913038] [2019-11-06 22:33:38,789 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:33:38,789 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:33:38,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236662607] [2019-11-06 22:33:38,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:33:38,799 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:38,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:33:38,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:33:38,800 INFO L87 Difference]: Start difference. First operand 626 states and 843 transitions. Second operand 6 states. [2019-11-06 22:33:39,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:39,501 INFO L93 Difference]: Finished difference Result 1858 states and 2601 transitions. [2019-11-06 22:33:39,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:33:39,503 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 154 [2019-11-06 22:33:39,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:39,510 INFO L225 Difference]: With dead ends: 1858 [2019-11-06 22:33:39,511 INFO L226 Difference]: Without dead ends: 1238 [2019-11-06 22:33:39,513 INFO L630 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 [2019-11-06 22:33:39,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2019-11-06 22:33:39,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1218. [2019-11-06 22:33:39,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1218 states. [2019-11-06 22:33:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1637 transitions. [2019-11-06 22:33:39,552 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1637 transitions. Word has length 154 [2019-11-06 22:33:39,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:39,552 INFO L462 AbstractCegarLoop]: Abstraction has 1218 states and 1637 transitions. [2019-11-06 22:33:39,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:33:39,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1637 transitions. [2019-11-06 22:33:39,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-06 22:33:39,557 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:39,557 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:33:39,557 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:39,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:39,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1102274855, now seen corresponding path program 1 times [2019-11-06 22:33:39,558 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:39,558 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634524934] [2019-11-06 22:33:39,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:39,762 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634524934] [2019-11-06 22:33:39,763 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835986314] [2019-11-06 22:33:39,763 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 22:33:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:39,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:33:39,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:33:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:33:39,955 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:33:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:33:40,035 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:33:40,035 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2019-11-06 22:33:40,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339018007] [2019-11-06 22:33:40,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:33:40,037 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:40,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:33:40,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:33:40,038 INFO L87 Difference]: Start difference. First operand 1218 states and 1637 transitions. Second operand 4 states. [2019-11-06 22:33:40,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:40,769 INFO L93 Difference]: Finished difference Result 2870 states and 3886 transitions. [2019-11-06 22:33:40,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:33:40,769 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2019-11-06 22:33:40,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:40,778 INFO L225 Difference]: With dead ends: 2870 [2019-11-06 22:33:40,778 INFO L226 Difference]: Without dead ends: 1658 [2019-11-06 22:33:40,784 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:33:40,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2019-11-06 22:33:40,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1657. [2019-11-06 22:33:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1657 states. [2019-11-06 22:33:40,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2100 transitions. [2019-11-06 22:33:40,846 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2100 transitions. Word has length 159 [2019-11-06 22:33:40,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:40,847 INFO L462 AbstractCegarLoop]: Abstraction has 1657 states and 2100 transitions. [2019-11-06 22:33:40,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:33:40,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2100 transitions. [2019-11-06 22:33:40,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-06 22:33:40,856 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:40,856 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:33:41,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:33:41,061 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:41,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:41,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1223928608, now seen corresponding path program 1 times [2019-11-06 22:33:41,063 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:41,064 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286662283] [2019-11-06 22:33:41,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:41,206 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286662283] [2019-11-06 22:33:41,206 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013647163] [2019-11-06 22:33:41,206 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 22:33:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:41,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:33:41,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:33:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:33:41,433 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:33:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:33:41,533 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:33:41,533 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-06 22:33:41,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137522541] [2019-11-06 22:33:41,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:33:41,536 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:41,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:33:41,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:33:41,537 INFO L87 Difference]: Start difference. First operand 1657 states and 2100 transitions. Second operand 3 states. [2019-11-06 22:33:42,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:42,105 INFO L93 Difference]: Finished difference Result 3889 states and 4958 transitions. [2019-11-06 22:33:42,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:33:42,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 191 [2019-11-06 22:33:42,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:42,120 INFO L225 Difference]: With dead ends: 3889 [2019-11-06 22:33:42,121 INFO L226 Difference]: Without dead ends: 2238 [2019-11-06 22:33:42,124 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 380 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:33:42,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2019-11-06 22:33:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 1806. [2019-11-06 22:33:42,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1806 states. [2019-11-06 22:33:42,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2284 transitions. [2019-11-06 22:33:42,175 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2284 transitions. Word has length 191 [2019-11-06 22:33:42,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:42,176 INFO L462 AbstractCegarLoop]: Abstraction has 1806 states and 2284 transitions. [2019-11-06 22:33:42,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:33:42,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2284 transitions. [2019-11-06 22:33:42,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2019-11-06 22:33:42,185 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:42,186 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2019-11-06 22:33:42,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:33:42,398 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:42,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:42,398 INFO L82 PathProgramCache]: Analyzing trace with hash 2027928456, now seen corresponding path program 1 times [2019-11-06 22:33:42,399 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:42,399 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304499208] [2019-11-06 22:33:42,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 151 proven. 52 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 22:33:42,541 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304499208] [2019-11-06 22:33:42,541 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790012314] [2019-11-06 22:33:42,542 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 22:33:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:42,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:33:42,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:33:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 202 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:33:42,800 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:33:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 202 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:33:42,916 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1650271625] [2019-11-06 22:33:42,922 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 272 [2019-11-06 22:33:42,967 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:33:42,967 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)