/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/Problem18_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:58:35,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:58:35,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:58:35,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:58:35,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:58:35,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:58:35,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:58:35,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:58:35,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:58:35,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:58:35,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:58:35,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:58:35,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:58:35,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:58:35,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:58:35,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:58:35,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:58:35,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:58:35,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:58:35,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:58:35,615 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 22:58:35,637 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:58:35,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:58:35,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:58:35,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:58:35,640 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:58:35,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:58:35,641 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:58:35,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:58:35,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:58:35,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:58:35,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:58:35,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:58:35,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:58:35,643 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:58:35,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:58:35,643 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:58:35,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:58:35,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:58:35,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:58:35,644 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:58:35,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:58:35,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:58:35,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:58:35,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:58:35,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:58:35,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:58:35,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:58:35,646 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:58:35,646 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 22:58:35,940 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:58:35,956 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:58:35,960 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:58:35,961 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:58:35,963 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:58:35,964 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label59.c [2019-11-06 22:58:36,032 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f3a37eee/9b7fde56805740f7b270465169dee97f/FLAGebc6696b5 [2019-11-06 22:58:36,780 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:58:36,781 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label59.c [2019-11-06 22:58:36,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f3a37eee/9b7fde56805740f7b270465169dee97f/FLAGebc6696b5 [2019-11-06 22:58:36,860 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f3a37eee/9b7fde56805740f7b270465169dee97f [2019-11-06 22:58:36,871 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:58:36,873 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:58:36,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:58:36,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:58:36,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:58:36,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:36" (1/1) ... [2019-11-06 22:58:36,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cf89839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:36, skipping insertion in model container [2019-11-06 22:58:36,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:36" (1/1) ... [2019-11-06 22:58:36,895 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:58:37,010 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:58:38,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:58:38,256 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:58:38,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:58:38,837 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:58:38,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:38 WrapperNode [2019-11-06 22:58:38,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:58:38,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:58:38,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:58:38,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:58:38,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:38" (1/1) ... [2019-11-06 22:58:38,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:38" (1/1) ... [2019-11-06 22:58:38,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:38" (1/1) ... [2019-11-06 22:58:38,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:38" (1/1) ... [2019-11-06 22:58:38,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:38" (1/1) ... [2019-11-06 22:58:39,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:38" (1/1) ... [2019-11-06 22:58:39,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:38" (1/1) ... [2019-11-06 22:58:39,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:58:39,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:58:39,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:58:39,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:58:39,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:38" (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 22:58:39,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:58:39,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:58:39,146 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:58:39,146 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:58:39,146 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:58:39,147 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:58:39,147 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:58:39,147 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:58:39,147 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:58:39,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:58:39,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:58:39,148 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:58:39,149 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:58:39,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:58:39,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:58:43,463 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:58:43,464 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:58:43,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:43 BoogieIcfgContainer [2019-11-06 22:58:43,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:58:43,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:58:43,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:58:43,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:58:43,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:58:36" (1/3) ... [2019-11-06 22:58:43,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9dd3b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:58:43, skipping insertion in model container [2019-11-06 22:58:43,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:38" (2/3) ... [2019-11-06 22:58:43,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9dd3b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:58:43, skipping insertion in model container [2019-11-06 22:58:43,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:43" (3/3) ... [2019-11-06 22:58:43,493 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label59.c [2019-11-06 22:58:43,507 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:58:43,518 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:58:43,532 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:58:43,576 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:58:43,576 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:58:43,576 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:58:43,576 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:58:43,576 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:58:43,577 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:58:43,577 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:58:43,577 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:58:43,619 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 22:58:43,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 22:58:43,628 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:43,629 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] [2019-11-06 22:58:43,631 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:43,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:43,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1601296886, now seen corresponding path program 1 times [2019-11-06 22:58:43,648 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:43,648 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858843121] [2019-11-06 22:58:43,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:43,981 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 22:58:43,981 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858843121] [2019-11-06 22:58:43,982 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:43,983 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:58:43,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196133704] [2019-11-06 22:58:43,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:58:43,992 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:44,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:58:44,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:58:44,010 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-11-06 22:58:48,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:48,562 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-11-06 22:58:48,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:58:48,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-11-06 22:58:48,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:48,602 INFO L225 Difference]: With dead ends: 2248 [2019-11-06 22:58:48,602 INFO L226 Difference]: Without dead ends: 1412 [2019-11-06 22:58:48,614 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:58:48,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-11-06 22:58:48,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-11-06 22:58:48,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-11-06 22:58:48,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-11-06 22:58:48,769 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 43 [2019-11-06 22:58:48,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:48,769 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-11-06 22:58:48,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:58:48,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-11-06 22:58:48,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 22:58:48,777 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:48,778 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:48,778 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:48,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:48,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1229064497, now seen corresponding path program 1 times [2019-11-06 22:58:48,780 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:48,780 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714103814] [2019-11-06 22:58:48,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:49,037 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714103814] [2019-11-06 22:58:49,037 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:49,038 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:58:49,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082019101] [2019-11-06 22:58:49,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:58:49,040 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:49,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:58:49,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:58:49,041 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 5 states. [2019-11-06 22:58:54,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:54,765 INFO L93 Difference]: Finished difference Result 4291 states and 8027 transitions. [2019-11-06 22:58:54,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:58:54,766 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2019-11-06 22:58:54,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:54,787 INFO L225 Difference]: With dead ends: 4291 [2019-11-06 22:58:54,788 INFO L226 Difference]: Without dead ends: 2885 [2019-11-06 22:58:54,792 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:58:54,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2019-11-06 22:58:54,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2861. [2019-11-06 22:58:54,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2861 states. [2019-11-06 22:58:54,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 4925 transitions. [2019-11-06 22:58:54,915 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 4925 transitions. Word has length 112 [2019-11-06 22:58:54,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:54,918 INFO L462 AbstractCegarLoop]: Abstraction has 2861 states and 4925 transitions. [2019-11-06 22:58:54,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:58:54,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 4925 transitions. [2019-11-06 22:58:54,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-06 22:58:54,930 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:54,931 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:54,931 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:54,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:54,932 INFO L82 PathProgramCache]: Analyzing trace with hash -25302418, now seen corresponding path program 1 times [2019-11-06 22:58:54,932 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:54,933 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982909174] [2019-11-06 22:58:54,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:55,118 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982909174] [2019-11-06 22:58:55,119 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:55,119 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:58:55,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544378749] [2019-11-06 22:58:55,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:58:55,120 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:55,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:58:55,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:58:55,121 INFO L87 Difference]: Start difference. First operand 2861 states and 4925 transitions. Second operand 5 states. [2019-11-06 22:59:00,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:59:00,238 INFO L93 Difference]: Finished difference Result 7211 states and 12315 transitions. [2019-11-06 22:59:00,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:59:00,241 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 113 [2019-11-06 22:59:00,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:59:00,270 INFO L225 Difference]: With dead ends: 7211 [2019-11-06 22:59:00,271 INFO L226 Difference]: Without dead ends: 4356 [2019-11-06 22:59:00,279 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:59:00,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2019-11-06 22:59:00,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 4325. [2019-11-06 22:59:00,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4325 states. [2019-11-06 22:59:00,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4325 states to 4325 states and 6079 transitions. [2019-11-06 22:59:00,432 INFO L78 Accepts]: Start accepts. Automaton has 4325 states and 6079 transitions. Word has length 113 [2019-11-06 22:59:00,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:59:00,434 INFO L462 AbstractCegarLoop]: Abstraction has 4325 states and 6079 transitions. [2019-11-06 22:59:00,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:59:00,435 INFO L276 IsEmpty]: Start isEmpty. Operand 4325 states and 6079 transitions. [2019-11-06 22:59:00,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-06 22:59:00,442 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:59:00,442 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:59:00,442 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:59:00,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:59:00,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1998315758, now seen corresponding path program 1 times [2019-11-06 22:59:00,443 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:59:00,443 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571900547] [2019-11-06 22:59:00,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:59:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:59:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:59:00,591 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571900547] [2019-11-06 22:59:00,591 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:59:00,592 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:59:00,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040477536] [2019-11-06 22:59:00,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:59:00,593 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:59:00,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:59:00,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:59:00,593 INFO L87 Difference]: Start difference. First operand 4325 states and 6079 transitions. Second operand 5 states. [2019-11-06 22:59:06,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:59:06,625 INFO L93 Difference]: Finished difference Result 13274 states and 19026 transitions. [2019-11-06 22:59:06,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:59:06,628 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2019-11-06 22:59:06,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:59:06,666 INFO L225 Difference]: With dead ends: 13274 [2019-11-06 22:59:06,666 INFO L226 Difference]: Without dead ends: 8955 [2019-11-06 22:59:06,676 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:59:06,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8955 states. [2019-11-06 22:59:06,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8955 to 8798. [2019-11-06 22:59:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8798 states. [2019-11-06 22:59:06,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8798 states to 8798 states and 11426 transitions. [2019-11-06 22:59:06,920 INFO L78 Accepts]: Start accepts. Automaton has 8798 states and 11426 transitions. Word has length 115 [2019-11-06 22:59:06,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:59:06,921 INFO L462 AbstractCegarLoop]: Abstraction has 8798 states and 11426 transitions. [2019-11-06 22:59:06,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:59:06,921 INFO L276 IsEmpty]: Start isEmpty. Operand 8798 states and 11426 transitions. [2019-11-06 22:59:06,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-06 22:59:06,924 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:59:06,924 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:59:06,925 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:59:06,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:59:06,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2016787783, now seen corresponding path program 1 times [2019-11-06 22:59:06,926 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:59:06,926 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291641415] [2019-11-06 22:59:06,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:59:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:59:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:59:07,038 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291641415] [2019-11-06 22:59:07,038 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:59:07,038 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:59:07,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586583320] [2019-11-06 22:59:07,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:59:07,040 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:59:07,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:59:07,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:59:07,041 INFO L87 Difference]: Start difference. First operand 8798 states and 11426 transitions. Second operand 3 states. [2019-11-06 22:59:10,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:59:10,760 INFO L93 Difference]: Finished difference Result 25412 states and 33528 transitions. [2019-11-06 22:59:10,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:59:10,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2019-11-06 22:59:10,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:59:10,834 INFO L225 Difference]: With dead ends: 25412 [2019-11-06 22:59:10,834 INFO L226 Difference]: Without dead ends: 16620 [2019-11-06 22:59:10,857 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 22:59:10,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16620 states. [2019-11-06 22:59:11,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16620 to 15908. [2019-11-06 22:59:11,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15908 states. [2019-11-06 22:59:11,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15908 states to 15908 states and 19164 transitions. [2019-11-06 22:59:11,148 INFO L78 Accepts]: Start accepts. Automaton has 15908 states and 19164 transitions. Word has length 140 [2019-11-06 22:59:11,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:59:11,150 INFO L462 AbstractCegarLoop]: Abstraction has 15908 states and 19164 transitions. [2019-11-06 22:59:11,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:59:11,150 INFO L276 IsEmpty]: Start isEmpty. Operand 15908 states and 19164 transitions. [2019-11-06 22:59:11,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-11-06 22:59:11,157 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:59:11,157 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:59:11,158 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:59:11,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:59:11,158 INFO L82 PathProgramCache]: Analyzing trace with hash 894224995, now seen corresponding path program 1 times [2019-11-06 22:59:11,159 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:59:11,159 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214652381] [2019-11-06 22:59:11,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:59:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:59:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 22:59:11,482 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214652381] [2019-11-06 22:59:11,483 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:59:11,483 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:59:11,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777900031] [2019-11-06 22:59:11,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:59:11,485 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:59:11,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:59:11,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:59:11,487 INFO L87 Difference]: Start difference. First operand 15908 states and 19164 transitions. Second operand 4 states.