/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_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:31:36,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:31:36,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:31:36,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:31:36,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:31:36,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:31:36,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:31:36,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:31:36,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:31:36,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:31:36,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:31:36,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:31:36,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:31:36,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:31:36,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:31:36,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:31:36,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:31:36,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:31:36,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:31:36,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:31:36,530 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 22:31:36,559 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:31:36,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:31:36,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:31:36,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:31:36,563 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:31:36,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:31:36,564 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:31:36,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:31:36,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:31:36,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:31:36,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:31:36,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:31:36,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:31:36,568 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:31:36,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:31:36,568 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:31:36,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:31:36,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:31:36,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:31:36,569 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:31:36,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:31:36,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:31:36,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:31:36,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:31:36,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:31:36,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:31:36,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:31:36,574 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:31:36,574 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 22:31:36,860 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:31:36,878 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:31:36,881 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:31:36,882 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:31:36,883 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:31:36,884 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label47.c [2019-11-06 22:31:36,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21f65d43f/9f82246c5ef94d14af543a90a2ab0c4c/FLAG2d765b1f9 [2019-11-06 22:31:37,472 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:31:37,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label47.c [2019-11-06 22:31:37,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21f65d43f/9f82246c5ef94d14af543a90a2ab0c4c/FLAG2d765b1f9 [2019-11-06 22:31:37,771 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21f65d43f/9f82246c5ef94d14af543a90a2ab0c4c [2019-11-06 22:31:37,778 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:31:37,780 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:31:37,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:31:37,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:31:37,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:31:37,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:31:37" (1/1) ... [2019-11-06 22:31:37,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f087c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:37, skipping insertion in model container [2019-11-06 22:31:37,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:31:37" (1/1) ... [2019-11-06 22:31:37,795 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:31:37,859 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:31:38,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:31:38,371 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:31:38,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:31:38,511 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:31:38,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:38 WrapperNode [2019-11-06 22:31:38,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:31:38,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:31:38,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:31:38,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:31:38,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:38" (1/1) ... [2019-11-06 22:31:38,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:38" (1/1) ... [2019-11-06 22:31:38,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:38" (1/1) ... [2019-11-06 22:31:38,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:38" (1/1) ... [2019-11-06 22:31:38,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:38" (1/1) ... [2019-11-06 22:31:38,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:38" (1/1) ... [2019-11-06 22:31:38,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:38" (1/1) ... [2019-11-06 22:31:38,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:31:38,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:31:38,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:31:38,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:31:38,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:38" (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 22:31:38,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:31:38,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:31:38,716 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:31:38,717 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:31:38,717 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:31:38,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:31:38,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:31:38,717 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:31:38,717 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:31:38,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:31:38,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:31:39,863 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:31:39,863 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:31:39,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:31:39 BoogieIcfgContainer [2019-11-06 22:31:39,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:31:39,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:31:39,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:31:39,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:31:39,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:31:37" (1/3) ... [2019-11-06 22:31:39,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3cd203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:31:39, skipping insertion in model container [2019-11-06 22:31:39,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:38" (2/3) ... [2019-11-06 22:31:39,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3cd203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:31:39, skipping insertion in model container [2019-11-06 22:31:39,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:31:39" (3/3) ... [2019-11-06 22:31:39,873 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label47.c [2019-11-06 22:31:39,883 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:31:39,891 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:31:39,903 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:31:39,929 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:31:39,930 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:31:39,930 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:31:39,930 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:31:39,930 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:31:39,930 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:31:39,931 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:31:39,931 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:31:39,955 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-11-06 22:31:39,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-06 22:31:39,967 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:39,968 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] [2019-11-06 22:31:39,970 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:39,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:39,977 INFO L82 PathProgramCache]: Analyzing trace with hash -544114481, now seen corresponding path program 1 times [2019-11-06 22:31:39,987 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:39,988 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221244612] [2019-11-06 22:31:39,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:40,477 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 22:31:40,478 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221244612] [2019-11-06 22:31:40,478 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:31:40,479 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:31:40,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719619516] [2019-11-06 22:31:40,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:31:40,487 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:31:40,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:31:40,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:31:40,504 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-11-06 22:31:41,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:31:41,321 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-11-06 22:31:41,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:31:41,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2019-11-06 22:31:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:31:41,351 INFO L225 Difference]: With dead ends: 547 [2019-11-06 22:31:41,351 INFO L226 Difference]: Without dead ends: 278 [2019-11-06 22:31:41,361 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 22:31:41,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-06 22:31:41,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-11-06 22:31:41,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-11-06 22:31:41,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 400 transitions. [2019-11-06 22:31:41,445 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 400 transitions. Word has length 79 [2019-11-06 22:31:41,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:31:41,446 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 400 transitions. [2019-11-06 22:31:41,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:31:41,446 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 400 transitions. [2019-11-06 22:31:41,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-06 22:31:41,451 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:41,451 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, 1] [2019-11-06 22:31:41,451 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:41,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:41,452 INFO L82 PathProgramCache]: Analyzing trace with hash -488298920, now seen corresponding path program 1 times [2019-11-06 22:31:41,452 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:41,452 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992276486] [2019-11-06 22:31:41,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:41,594 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 22:31:41,595 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992276486] [2019-11-06 22:31:41,595 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:31:41,595 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:31:41,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588797952] [2019-11-06 22:31:41,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:31:41,598 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:31:41,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:31:41,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:31:41,598 INFO L87 Difference]: Start difference. First operand 278 states and 400 transitions. Second operand 6 states. [2019-11-06 22:31:42,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:31:42,464 INFO L93 Difference]: Finished difference Result 703 states and 1026 transitions. [2019-11-06 22:31:42,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:31:42,466 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2019-11-06 22:31:42,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:31:42,472 INFO L225 Difference]: With dead ends: 703 [2019-11-06 22:31:42,472 INFO L226 Difference]: Without dead ends: 431 [2019-11-06 22:31:42,473 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 22:31:42,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-11-06 22:31:42,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 419. [2019-11-06 22:31:42,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2019-11-06 22:31:42,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 588 transitions. [2019-11-06 22:31:42,505 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 588 transitions. Word has length 89 [2019-11-06 22:31:42,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:31:42,506 INFO L462 AbstractCegarLoop]: Abstraction has 419 states and 588 transitions. [2019-11-06 22:31:42,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:31:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 588 transitions. [2019-11-06 22:31:42,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 22:31:42,509 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:42,510 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, 1] [2019-11-06 22:31:42,510 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:42,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:42,510 INFO L82 PathProgramCache]: Analyzing trace with hash -905085738, now seen corresponding path program 1 times [2019-11-06 22:31:42,511 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:42,511 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954050150] [2019-11-06 22:31:42,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:42,627 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 22:31:42,628 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954050150] [2019-11-06 22:31:42,628 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:31:42,628 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:31:42,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812939655] [2019-11-06 22:31:42,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:31:42,631 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:31:42,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:31:42,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:31:42,632 INFO L87 Difference]: Start difference. First operand 419 states and 588 transitions. Second operand 3 states. [2019-11-06 22:31:43,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:31:43,185 INFO L93 Difference]: Finished difference Result 1241 states and 1783 transitions. [2019-11-06 22:31:43,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:31:43,185 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2019-11-06 22:31:43,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:31:43,191 INFO L225 Difference]: With dead ends: 1241 [2019-11-06 22:31:43,191 INFO L226 Difference]: Without dead ends: 828 [2019-11-06 22:31:43,192 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 22:31:43,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2019-11-06 22:31:43,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2019-11-06 22:31:43,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2019-11-06 22:31:43,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1098 transitions. [2019-11-06 22:31:43,242 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1098 transitions. Word has length 90 [2019-11-06 22:31:43,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:31:43,243 INFO L462 AbstractCegarLoop]: Abstraction has 828 states and 1098 transitions. [2019-11-06 22:31:43,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:31:43,243 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1098 transitions. [2019-11-06 22:31:43,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-06 22:31:43,247 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:43,248 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:31:43,248 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:43,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:43,248 INFO L82 PathProgramCache]: Analyzing trace with hash -886444004, now seen corresponding path program 1 times [2019-11-06 22:31:43,248 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:43,249 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322360481] [2019-11-06 22:31:43,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:43,337 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322360481] [2019-11-06 22:31:43,338 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:31:43,338 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:31:43,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158955137] [2019-11-06 22:31:43,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:31:43,339 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:31:43,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:31:43,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:31:43,340 INFO L87 Difference]: Start difference. First operand 828 states and 1098 transitions. Second operand 4 states. [2019-11-06 22:31:44,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:31:44,271 INFO L93 Difference]: Finished difference Result 2740 states and 3761 transitions. [2019-11-06 22:31:44,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:31:44,273 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2019-11-06 22:31:44,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:31:44,286 INFO L225 Difference]: With dead ends: 2740 [2019-11-06 22:31:44,286 INFO L226 Difference]: Without dead ends: 1918 [2019-11-06 22:31:44,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:31:44,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2019-11-06 22:31:44,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1241. [2019-11-06 22:31:44,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1241 states. [2019-11-06 22:31:44,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 1689 transitions. [2019-11-06 22:31:44,357 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 1689 transitions. Word has length 91 [2019-11-06 22:31:44,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:31:44,358 INFO L462 AbstractCegarLoop]: Abstraction has 1241 states and 1689 transitions. [2019-11-06 22:31:44,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:31:44,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 1689 transitions. [2019-11-06 22:31:44,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-06 22:31:44,362 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:44,362 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, 1] [2019-11-06 22:31:44,363 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:44,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:44,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1065436450, now seen corresponding path program 1 times [2019-11-06 22:31:44,363 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:44,364 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4228242] [2019-11-06 22:31:44,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:44,519 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 22:31:44,520 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4228242] [2019-11-06 22:31:44,520 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:31:44,521 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:31:44,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034746184] [2019-11-06 22:31:44,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:31:44,523 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:31:44,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:31:44,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:31:44,524 INFO L87 Difference]: Start difference. First operand 1241 states and 1689 transitions. Second operand 3 states. [2019-11-06 22:31:45,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:31:45,141 INFO L93 Difference]: Finished difference Result 3433 states and 4830 transitions. [2019-11-06 22:31:45,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:31:45,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2019-11-06 22:31:45,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:31:45,155 INFO L225 Difference]: With dead ends: 3433 [2019-11-06 22:31:45,157 INFO L226 Difference]: Without dead ends: 2198 [2019-11-06 22:31:45,163 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 22:31:45,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2198 states. [2019-11-06 22:31:45,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2198 to 2198. [2019-11-06 22:31:45,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2198 states. [2019-11-06 22:31:45,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2198 states to 2198 states and 2964 transitions. [2019-11-06 22:31:45,270 INFO L78 Accepts]: Start accepts. Automaton has 2198 states and 2964 transitions. Word has length 96 [2019-11-06 22:31:45,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:31:45,270 INFO L462 AbstractCegarLoop]: Abstraction has 2198 states and 2964 transitions. [2019-11-06 22:31:45,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:31:45,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2198 states and 2964 transitions. [2019-11-06 22:31:45,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 22:31:45,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:45,277 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:31:45,277 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:45,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:45,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1520464804, now seen corresponding path program 1 times [2019-11-06 22:31:45,278 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:45,278 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770068989] [2019-11-06 22:31:45,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:45,372 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770068989] [2019-11-06 22:31:45,372 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:31:45,372 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:31:45,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699157383] [2019-11-06 22:31:45,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:31:45,373 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:31:45,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:31:45,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:31:45,374 INFO L87 Difference]: Start difference. First operand 2198 states and 2964 transitions. Second operand 6 states. [2019-11-06 22:31:45,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:31:45,998 INFO L93 Difference]: Finished difference Result 4718 states and 6523 transitions. [2019-11-06 22:31:45,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:31:45,999 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-11-06 22:31:45,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:31:46,015 INFO L225 Difference]: With dead ends: 4718 [2019-11-06 22:31:46,016 INFO L226 Difference]: Without dead ends: 2526 [2019-11-06 22:31:46,022 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 22:31:46,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2526 states. [2019-11-06 22:31:46,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2526 to 1817. [2019-11-06 22:31:46,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1817 states. [2019-11-06 22:31:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1817 states to 1817 states and 2236 transitions. [2019-11-06 22:31:46,092 INFO L78 Accepts]: Start accepts. Automaton has 1817 states and 2236 transitions. Word has length 123 [2019-11-06 22:31:46,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:31:46,093 INFO L462 AbstractCegarLoop]: Abstraction has 1817 states and 2236 transitions. [2019-11-06 22:31:46,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:31:46,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1817 states and 2236 transitions. [2019-11-06 22:31:46,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 22:31:46,097 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:46,098 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:31:46,098 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:46,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:46,098 INFO L82 PathProgramCache]: Analyzing trace with hash -2092244509, now seen corresponding path program 1 times [2019-11-06 22:31:46,099 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:46,099 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434101383] [2019-11-06 22:31:46,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:46,238 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434101383] [2019-11-06 22:31:46,238 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239229564] [2019-11-06 22:31:46,238 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 22:31:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:46,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:31:46,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:31:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:46,403 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:31:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:46,529 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1119833336] [2019-11-06 22:31:46,540 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 135 [2019-11-06 22:31:46,588 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:31:46,588 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)