/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/Problem01_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:29:23,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:29:23,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:29:23,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:29:23,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:29:23,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:29:23,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:29:23,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:29:23,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:29:23,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:29:23,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:29:23,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:29:23,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:29:23,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:29:23,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:29:23,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:29:23,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:29:23,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:29:23,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:29:23,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:29:23,592 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 22:29:23,608 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:29:23,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:29:23,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:29:23,610 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:29:23,610 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:29:23,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:29:23,611 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:29:23,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:29:23,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:29:23,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:29:23,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:29:23,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:29:23,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:29:23,613 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:29:23,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:29:23,613 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:29:23,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:29:23,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:29:23,614 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:29:23,615 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:29:23,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:29:23,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:29:23,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:29:23,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:29:23,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:29:23,616 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:29:23,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:29:23,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:29:23,617 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 22:29:23,914 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:29:23,929 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:29:23,933 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:29:23,935 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:29:23,935 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:29:23,936 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label20.c [2019-11-06 22:29:24,007 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bb603c49/90d5514843e34afa9730ee6661c2ee9d/FLAGb9f8e7519 [2019-11-06 22:29:24,576 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:29:24,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label20.c [2019-11-06 22:29:24,592 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bb603c49/90d5514843e34afa9730ee6661c2ee9d/FLAGb9f8e7519 [2019-11-06 22:29:24,828 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bb603c49/90d5514843e34afa9730ee6661c2ee9d [2019-11-06 22:29:24,836 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:29:24,837 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:29:24,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:29:24,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:29:24,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:29:24,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:24" (1/1) ... [2019-11-06 22:29:24,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39efa35e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:24, skipping insertion in model container [2019-11-06 22:29:24,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:24" (1/1) ... [2019-11-06 22:29:24,855 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:29:24,904 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:29:25,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:29:25,421 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:29:25,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:29:25,588 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:29:25,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:25 WrapperNode [2019-11-06 22:29:25,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:29:25,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:29:25,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:29:25,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:29:25,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:25" (1/1) ... [2019-11-06 22:29:25,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:25" (1/1) ... [2019-11-06 22:29:25,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:25" (1/1) ... [2019-11-06 22:29:25,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:25" (1/1) ... [2019-11-06 22:29:25,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:25" (1/1) ... [2019-11-06 22:29:25,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:25" (1/1) ... [2019-11-06 22:29:25,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:25" (1/1) ... [2019-11-06 22:29:25,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:29:25,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:29:25,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:29:25,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:29:25,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:25" (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 22:29:25,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:29:25,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:29:25,757 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:29:25,757 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:29:25,757 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:29:25,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:29:25,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:29:25,758 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:29:25,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:29:25,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:29:25,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:29:26,900 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:29:26,900 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:29:26,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:26 BoogieIcfgContainer [2019-11-06 22:29:26,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:29:26,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:29:26,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:29:26,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:29:26,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:29:24" (1/3) ... [2019-11-06 22:29:26,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2528c283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:26, skipping insertion in model container [2019-11-06 22:29:26,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:25" (2/3) ... [2019-11-06 22:29:26,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2528c283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:26, skipping insertion in model container [2019-11-06 22:29:26,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:26" (3/3) ... [2019-11-06 22:29:26,911 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label20.c [2019-11-06 22:29:26,921 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:29:26,931 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:29:26,945 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:29:26,976 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:29:26,976 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:29:26,976 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:29:26,976 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:29:26,977 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:29:26,977 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:29:26,977 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:29:26,977 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:29:27,003 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-11-06 22:29:27,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-06 22:29:27,012 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:27,014 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] [2019-11-06 22:29:27,016 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:27,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:27,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1090826438, now seen corresponding path program 1 times [2019-11-06 22:29:27,035 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:27,035 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412747961] [2019-11-06 22:29:27,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:27,474 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 22:29:27,475 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412747961] [2019-11-06 22:29:27,476 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:29:27,477 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:29:27,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590255904] [2019-11-06 22:29:27,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:29:27,487 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:27,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:29:27,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:29:27,504 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-11-06 22:29:28,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:28,397 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-11-06 22:29:28,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:29:28,401 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2019-11-06 22:29:28,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:28,427 INFO L225 Difference]: With dead ends: 547 [2019-11-06 22:29:28,427 INFO L226 Difference]: Without dead ends: 278 [2019-11-06 22:29:28,437 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 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 22:29:28,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-06 22:29:28,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-11-06 22:29:28,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-11-06 22:29:28,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 400 transitions. [2019-11-06 22:29:28,537 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 400 transitions. Word has length 78 [2019-11-06 22:29:28,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:28,538 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 400 transitions. [2019-11-06 22:29:28,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:29:28,539 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 400 transitions. [2019-11-06 22:29:28,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-06 22:29:28,551 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:28,551 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:29:28,551 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:28,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:28,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2093961699, now seen corresponding path program 1 times [2019-11-06 22:29:28,553 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:28,553 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377657107] [2019-11-06 22:29:28,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:28,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:28,727 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377657107] [2019-11-06 22:29:28,727 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:29:28,728 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:29:28,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221489571] [2019-11-06 22:29:28,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:29:28,730 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:28,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:29:28,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:29:28,730 INFO L87 Difference]: Start difference. First operand 278 states and 400 transitions. Second operand 6 states. [2019-11-06 22:29:29,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:29,447 INFO L93 Difference]: Finished difference Result 703 states and 1026 transitions. [2019-11-06 22:29:29,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:29:29,448 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2019-11-06 22:29:29,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:29,453 INFO L225 Difference]: With dead ends: 703 [2019-11-06 22:29:29,453 INFO L226 Difference]: Without dead ends: 431 [2019-11-06 22:29:29,454 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 22:29:29,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-11-06 22:29:29,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 419. [2019-11-06 22:29:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2019-11-06 22:29:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 588 transitions. [2019-11-06 22:29:29,476 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 588 transitions. Word has length 88 [2019-11-06 22:29:29,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:29,477 INFO L462 AbstractCegarLoop]: Abstraction has 419 states and 588 transitions. [2019-11-06 22:29:29,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:29:29,477 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 588 transitions. [2019-11-06 22:29:29,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-06 22:29:29,479 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:29,479 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:29:29,479 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:29,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:29,480 INFO L82 PathProgramCache]: Analyzing trace with hash 109350879, now seen corresponding path program 1 times [2019-11-06 22:29:29,480 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:29,480 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790459366] [2019-11-06 22:29:29,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:29,568 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790459366] [2019-11-06 22:29:29,568 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:29:29,568 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:29:29,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860086003] [2019-11-06 22:29:29,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:29:29,569 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:29,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:29:29,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:29:29,570 INFO L87 Difference]: Start difference. First operand 419 states and 588 transitions. Second operand 3 states. [2019-11-06 22:29:30,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:30,158 INFO L93 Difference]: Finished difference Result 1241 states and 1783 transitions. [2019-11-06 22:29:30,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:29:30,159 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2019-11-06 22:29:30,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:30,164 INFO L225 Difference]: With dead ends: 1241 [2019-11-06 22:29:30,164 INFO L226 Difference]: Without dead ends: 828 [2019-11-06 22:29:30,165 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 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 22:29:30,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2019-11-06 22:29:30,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2019-11-06 22:29:30,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2019-11-06 22:29:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1098 transitions. [2019-11-06 22:29:30,196 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1098 transitions. Word has length 89 [2019-11-06 22:29:30,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:30,196 INFO L462 AbstractCegarLoop]: Abstraction has 828 states and 1098 transitions. [2019-11-06 22:29:30,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:29:30,197 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1098 transitions. [2019-11-06 22:29:30,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-06 22:29:30,199 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:30,199 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:29:30,199 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:30,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:30,200 INFO L82 PathProgramCache]: Analyzing trace with hash 311463443, now seen corresponding path program 1 times [2019-11-06 22:29:30,200 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:30,200 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88297963] [2019-11-06 22:29:30,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:30,284 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88297963] [2019-11-06 22:29:30,285 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:29:30,285 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:29:30,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287211571] [2019-11-06 22:29:30,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:29:30,286 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:30,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:29:30,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:29:30,286 INFO L87 Difference]: Start difference. First operand 828 states and 1098 transitions. Second operand 3 states. [2019-11-06 22:29:30,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:30,813 INFO L93 Difference]: Finished difference Result 2196 states and 3010 transitions. [2019-11-06 22:29:30,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:29:30,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2019-11-06 22:29:30,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:30,824 INFO L225 Difference]: With dead ends: 2196 [2019-11-06 22:29:30,824 INFO L226 Difference]: Without dead ends: 1374 [2019-11-06 22:29:30,826 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 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 22:29:30,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2019-11-06 22:29:30,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1237. [2019-11-06 22:29:30,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1237 states. [2019-11-06 22:29:30,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1669 transitions. [2019-11-06 22:29:30,877 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1669 transitions. Word has length 95 [2019-11-06 22:29:30,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:30,878 INFO L462 AbstractCegarLoop]: Abstraction has 1237 states and 1669 transitions. [2019-11-06 22:29:30,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:29:30,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1669 transitions. [2019-11-06 22:29:30,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-06 22:29:30,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:30,883 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:29:30,884 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:30,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:30,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1961778941, now seen corresponding path program 1 times [2019-11-06 22:29:30,884 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:30,885 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718424829] [2019-11-06 22:29:30,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:31,012 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718424829] [2019-11-06 22:29:31,013 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:29:31,013 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:29:31,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359238253] [2019-11-06 22:29:31,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:29:31,014 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:31,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:29:31,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:29:31,015 INFO L87 Difference]: Start difference. First operand 1237 states and 1669 transitions. Second operand 6 states. [2019-11-06 22:29:31,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:31,775 INFO L93 Difference]: Finished difference Result 2518 states and 3539 transitions. [2019-11-06 22:29:31,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:29:31,776 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2019-11-06 22:29:31,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:31,784 INFO L225 Difference]: With dead ends: 2518 [2019-11-06 22:29:31,784 INFO L226 Difference]: Without dead ends: 1287 [2019-11-06 22:29:31,787 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 22:29:31,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2019-11-06 22:29:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1126. [2019-11-06 22:29:31,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1126 states. [2019-11-06 22:29:31,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1411 transitions. [2019-11-06 22:29:31,825 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1411 transitions. Word has length 103 [2019-11-06 22:29:31,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:31,827 INFO L462 AbstractCegarLoop]: Abstraction has 1126 states and 1411 transitions. [2019-11-06 22:29:31,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:29:31,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1411 transitions. [2019-11-06 22:29:31,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 22:29:31,831 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:31,831 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:29:31,831 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:31,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:31,832 INFO L82 PathProgramCache]: Analyzing trace with hash -102961192, now seen corresponding path program 1 times [2019-11-06 22:29:31,832 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:31,832 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874988884] [2019-11-06 22:29:31,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:31,932 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874988884] [2019-11-06 22:29:31,932 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775242097] [2019-11-06 22:29:31,932 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 22:29:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:32,033 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:29:32,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:29:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 22:29:32,176 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:29:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 22:29:32,298 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:29:32,298 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2019-11-06 22:29:32,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399985579] [2019-11-06 22:29:32,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:29:32,299 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:32,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:29:32,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:29:32,301 INFO L87 Difference]: Start difference. First operand 1126 states and 1411 transitions. Second operand 4 states. [2019-11-06 22:29:32,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:32,851 INFO L93 Difference]: Finished difference Result 3346 states and 4231 transitions. [2019-11-06 22:29:32,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:29:32,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2019-11-06 22:29:32,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:32,866 INFO L225 Difference]: With dead ends: 3346 [2019-11-06 22:29:32,866 INFO L226 Difference]: Without dead ends: 2226 [2019-11-06 22:29:32,871 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 217 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:29:32,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2019-11-06 22:29:32,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 2226. [2019-11-06 22:29:32,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2226 states. [2019-11-06 22:29:32,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 2775 transitions. [2019-11-06 22:29:32,960 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 2775 transitions. Word has length 112 [2019-11-06 22:29:32,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:32,964 INFO L462 AbstractCegarLoop]: Abstraction has 2226 states and 2775 transitions. [2019-11-06 22:29:32,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:29:32,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 2775 transitions. [2019-11-06 22:29:32,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-06 22:29:32,973 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:32,973 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:29:33,186 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:29:33,186 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:33,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:33,187 INFO L82 PathProgramCache]: Analyzing trace with hash 538165258, now seen corresponding path program 1 times [2019-11-06 22:29:33,188 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:33,188 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203742684] [2019-11-06 22:29:33,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:33,290 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203742684] [2019-11-06 22:29:33,290 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687807142] [2019-11-06 22:29:33,291 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 22:29:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:33,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:29:33,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:29:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:29:33,489 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:29:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:29:33,529 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:29:33,530 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-06 22:29:33,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297076677] [2019-11-06 22:29:33,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:29:33,531 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:33,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:29:33,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:29:33,531 INFO L87 Difference]: Start difference. First operand 2226 states and 2775 transitions. Second operand 3 states. [2019-11-06 22:29:34,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:34,011 INFO L93 Difference]: Finished difference Result 3040 states and 3851 transitions. [2019-11-06 22:29:34,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:29:34,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2019-11-06 22:29:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:34,026 INFO L225 Difference]: With dead ends: 3040 [2019-11-06 22:29:34,026 INFO L226 Difference]: Without dead ends: 3038 [2019-11-06 22:29:34,027 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 226 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 22:29:34,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2019-11-06 22:29:34,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 2768. [2019-11-06 22:29:34,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2768 states. [2019-11-06 22:29:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 3486 transitions. [2019-11-06 22:29:34,101 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 3486 transitions. Word has length 114 [2019-11-06 22:29:34,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:34,101 INFO L462 AbstractCegarLoop]: Abstraction has 2768 states and 3486 transitions. [2019-11-06 22:29:34,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:29:34,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 3486 transitions. [2019-11-06 22:29:34,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 22:29:34,107 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:34,108 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:29:34,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:29:34,311 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:34,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:34,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1019583006, now seen corresponding path program 1 times [2019-11-06 22:29:34,312 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:34,313 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438402086] [2019-11-06 22:29:34,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:34,401 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438402086] [2019-11-06 22:29:34,401 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727365663] [2019-11-06 22:29:34,401 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 22:29:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:34,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:29:34,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:29:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:34,546 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:29:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:34,611 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1780400422] [2019-11-06 22:29:34,618 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 135 [2019-11-06 22:29:34,682 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:29:34,683 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)