/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/Problem03_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:38:30,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:38:30,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:38:30,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:38:30,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:38:30,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:38:30,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:38:30,692 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 22:38:30,716 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:38:30,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:38:30,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:38:30,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:38:30,718 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:38:30,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:38:30,723 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:38:30,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:38:30,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:38:30,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:38:30,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:38:30,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:38:30,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:38:30,724 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:38:30,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:38:30,725 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:38:30,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:38:30,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:38:30,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:38:30,725 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:38:30,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:38:30,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:38:30,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:38:30,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:38:30,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:38:30,727 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:38:30,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:38:30,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:38:30,727 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 22:38:31,001 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:38:31,017 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:38:31,021 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:38:31,022 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:38:31,022 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:38:31,023 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label39.c [2019-11-06 22:38:31,103 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a37c0f1d4/ad435124c69e474a91aa93968398b71d/FLAG87f6f474e [2019-11-06 22:38:31,797 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:38:31,800 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label39.c [2019-11-06 22:38:31,820 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a37c0f1d4/ad435124c69e474a91aa93968398b71d/FLAG87f6f474e [2019-11-06 22:38:31,949 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a37c0f1d4/ad435124c69e474a91aa93968398b71d [2019-11-06 22:38:31,957 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:38:31,958 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:38:31,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:38:31,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:38:31,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:38:31,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:38:31" (1/1) ... [2019-11-06 22:38:31,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30256132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:31, skipping insertion in model container [2019-11-06 22:38:31,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:38:31" (1/1) ... [2019-11-06 22:38:31,974 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:38:32,063 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:38:32,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:38:33,074 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:38:33,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:38:33,377 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:38:33,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:33 WrapperNode [2019-11-06 22:38:33,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:38:33,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:38:33,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:38:33,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:38:33,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:33" (1/1) ... [2019-11-06 22:38:33,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:33" (1/1) ... [2019-11-06 22:38:33,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:33" (1/1) ... [2019-11-06 22:38:33,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:33" (1/1) ... [2019-11-06 22:38:33,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:33" (1/1) ... [2019-11-06 22:38:33,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:33" (1/1) ... [2019-11-06 22:38:33,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:33" (1/1) ... [2019-11-06 22:38:33,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:38:33,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:38:33,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:38:33,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:38:33,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:33" (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 22:38:33,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:38:33,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:38:33,635 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:38:33,635 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:38:33,635 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:38:33,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:38:33,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:38:33,635 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:38:33,636 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:38:33,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:38:33,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:38:35,586 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:38:35,586 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:38:35,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:38:35 BoogieIcfgContainer [2019-11-06 22:38:35,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:38:35,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:38:35,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:38:35,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:38:35,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:38:31" (1/3) ... [2019-11-06 22:38:35,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec31f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:38:35, skipping insertion in model container [2019-11-06 22:38:35,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:33" (2/3) ... [2019-11-06 22:38:35,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec31f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:38:35, skipping insertion in model container [2019-11-06 22:38:35,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:38:35" (3/3) ... [2019-11-06 22:38:35,607 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label39.c [2019-11-06 22:38:35,620 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:38:35,631 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:38:35,644 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:38:35,688 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:38:35,688 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:38:35,688 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:38:35,689 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:38:35,689 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:38:35,689 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:38:35,689 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:38:35,690 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:38:35,725 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-11-06 22:38:35,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-06 22:38:35,745 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:35,746 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:35,748 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:35,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:35,754 INFO L82 PathProgramCache]: Analyzing trace with hash -986634456, now seen corresponding path program 1 times [2019-11-06 22:38:35,765 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:35,765 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195787782] [2019-11-06 22:38:35,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:36,613 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 22:38:36,614 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195787782] [2019-11-06 22:38:36,615 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:36,615 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:38:36,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183885553] [2019-11-06 22:38:36,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:38:36,624 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:36,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:38:36,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:38:36,641 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-11-06 22:38:37,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:37,894 INFO L93 Difference]: Finished difference Result 852 states and 1505 transitions. [2019-11-06 22:38:37,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:38:37,898 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2019-11-06 22:38:37,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:37,918 INFO L225 Difference]: With dead ends: 852 [2019-11-06 22:38:37,918 INFO L226 Difference]: Without dead ends: 479 [2019-11-06 22:38:37,925 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 22:38:37,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2019-11-06 22:38:38,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 465. [2019-11-06 22:38:38,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2019-11-06 22:38:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 749 transitions. [2019-11-06 22:38:38,009 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 749 transitions. Word has length 153 [2019-11-06 22:38:38,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:38,010 INFO L462 AbstractCegarLoop]: Abstraction has 465 states and 749 transitions. [2019-11-06 22:38:38,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:38:38,010 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 749 transitions. [2019-11-06 22:38:38,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-06 22:38:38,016 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:38,016 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:38,017 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:38,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:38,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1704163947, now seen corresponding path program 1 times [2019-11-06 22:38:38,018 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:38,018 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388857394] [2019-11-06 22:38:38,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:38,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:38,276 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388857394] [2019-11-06 22:38:38,276 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:38,276 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:38:38,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092262516] [2019-11-06 22:38:38,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:38:38,279 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:38,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:38:38,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:38:38,280 INFO L87 Difference]: Start difference. First operand 465 states and 749 transitions. Second operand 6 states. [2019-11-06 22:38:39,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:39,930 INFO L93 Difference]: Finished difference Result 1400 states and 2330 transitions. [2019-11-06 22:38:39,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:38:39,931 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 162 [2019-11-06 22:38:39,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:39,940 INFO L225 Difference]: With dead ends: 1400 [2019-11-06 22:38:39,940 INFO L226 Difference]: Without dead ends: 941 [2019-11-06 22:38:39,942 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 22:38:39,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2019-11-06 22:38:39,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 900. [2019-11-06 22:38:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 900 states. [2019-11-06 22:38:40,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1440 transitions. [2019-11-06 22:38:40,004 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1440 transitions. Word has length 162 [2019-11-06 22:38:40,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:40,004 INFO L462 AbstractCegarLoop]: Abstraction has 900 states and 1440 transitions. [2019-11-06 22:38:40,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:38:40,005 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1440 transitions. [2019-11-06 22:38:40,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-06 22:38:40,012 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:40,013 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:40,013 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:40,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:40,013 INFO L82 PathProgramCache]: Analyzing trace with hash 198136689, now seen corresponding path program 1 times [2019-11-06 22:38:40,014 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:40,014 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986670814] [2019-11-06 22:38:40,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:40,191 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986670814] [2019-11-06 22:38:40,192 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:40,192 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:38:40,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737075784] [2019-11-06 22:38:40,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:38:40,196 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:40,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:38:40,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:38:40,197 INFO L87 Difference]: Start difference. First operand 900 states and 1440 transitions. Second operand 5 states. [2019-11-06 22:38:41,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:41,715 INFO L93 Difference]: Finished difference Result 2690 states and 4475 transitions. [2019-11-06 22:38:41,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:38:41,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 163 [2019-11-06 22:38:41,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:41,729 INFO L225 Difference]: With dead ends: 2690 [2019-11-06 22:38:41,729 INFO L226 Difference]: Without dead ends: 1796 [2019-11-06 22:38:41,733 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 22:38:41,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2019-11-06 22:38:41,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1763. [2019-11-06 22:38:41,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1763 states. [2019-11-06 22:38:41,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2722 transitions. [2019-11-06 22:38:41,798 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2722 transitions. Word has length 163 [2019-11-06 22:38:41,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:41,798 INFO L462 AbstractCegarLoop]: Abstraction has 1763 states and 2722 transitions. [2019-11-06 22:38:41,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:38:41,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2722 transitions. [2019-11-06 22:38:41,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-06 22:38:41,805 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:41,805 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:41,806 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:41,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:41,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1802668228, now seen corresponding path program 1 times [2019-11-06 22:38:41,806 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:41,807 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631659755] [2019-11-06 22:38:41,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:42,109 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631659755] [2019-11-06 22:38:42,109 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630601027] [2019-11-06 22:38:42,109 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 22:38:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:42,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:38:42,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:38:42,470 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 22:38:42,470 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:38:42,537 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 22:38:42,538 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:38:42,538 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-11-06 22:38:42,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711111738] [2019-11-06 22:38:42,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:38:42,539 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:42,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:38:42,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:38:42,540 INFO L87 Difference]: Start difference. First operand 1763 states and 2722 transitions. Second operand 3 states. [2019-11-06 22:38:43,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:43,575 INFO L93 Difference]: Finished difference Result 5205 states and 8282 transitions. [2019-11-06 22:38:43,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:38:43,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 165 [2019-11-06 22:38:43,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:43,600 INFO L225 Difference]: With dead ends: 5205 [2019-11-06 22:38:43,600 INFO L226 Difference]: Without dead ends: 3448 [2019-11-06 22:38:43,606 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 331 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:38:43,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3448 states. [2019-11-06 22:38:43,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3448 to 3445. [2019-11-06 22:38:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3445 states. [2019-11-06 22:38:43,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 4859 transitions. [2019-11-06 22:38:43,706 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 4859 transitions. Word has length 165 [2019-11-06 22:38:43,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:43,706 INFO L462 AbstractCegarLoop]: Abstraction has 3445 states and 4859 transitions. [2019-11-06 22:38:43,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:38:43,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 4859 transitions. [2019-11-06 22:38:43,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-06 22:38:43,716 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:43,716 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:43,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:38:43,923 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:43,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:43,924 INFO L82 PathProgramCache]: Analyzing trace with hash -531391768, now seen corresponding path program 1 times [2019-11-06 22:38:43,924 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:43,924 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777436577] [2019-11-06 22:38:43,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:43,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:44,060 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777436577] [2019-11-06 22:38:44,060 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:44,060 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 22:38:44,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835461529] [2019-11-06 22:38:44,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:38:44,061 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:44,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:38:44,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:38:44,062 INFO L87 Difference]: Start difference. First operand 3445 states and 4859 transitions. Second operand 7 states. [2019-11-06 22:38:45,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:45,696 INFO L93 Difference]: Finished difference Result 10492 states and 16393 transitions. [2019-11-06 22:38:45,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:38:45,696 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 171 [2019-11-06 22:38:45,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:45,753 INFO L225 Difference]: With dead ends: 10492 [2019-11-06 22:38:45,753 INFO L226 Difference]: Without dead ends: 7053 [2019-11-06 22:38:45,765 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:38:45,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7053 states. [2019-11-06 22:38:45,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7053 to 6904. [2019-11-06 22:38:45,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6904 states. [2019-11-06 22:38:46,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 10114 transitions. [2019-11-06 22:38:46,016 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 10114 transitions. Word has length 171 [2019-11-06 22:38:46,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:46,016 INFO L462 AbstractCegarLoop]: Abstraction has 6904 states and 10114 transitions. [2019-11-06 22:38:46,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:38:46,017 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 10114 transitions. [2019-11-06 22:38:46,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-11-06 22:38:46,038 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:46,039 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:46,039 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:46,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:46,040 INFO L82 PathProgramCache]: Analyzing trace with hash -15837281, now seen corresponding path program 1 times [2019-11-06 22:38:46,040 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:46,040 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943620986] [2019-11-06 22:38:46,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:46,182 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943620986] [2019-11-06 22:38:46,182 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:46,183 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:38:46,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844931746] [2019-11-06 22:38:46,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:38:46,185 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:46,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:38:46,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:38:46,188 INFO L87 Difference]: Start difference. First operand 6904 states and 10114 transitions. Second operand 6 states. [2019-11-06 22:38:47,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:47,773 INFO L93 Difference]: Finished difference Result 19947 states and 31466 transitions. [2019-11-06 22:38:47,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:38:47,774 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 172 [2019-11-06 22:38:47,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:47,859 INFO L225 Difference]: With dead ends: 19947 [2019-11-06 22:38:47,859 INFO L226 Difference]: Without dead ends: 13049 [2019-11-06 22:38:47,888 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 22:38:47,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13049 states. [2019-11-06 22:38:48,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13049 to 12912. [2019-11-06 22:38:48,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12912 states. [2019-11-06 22:38:48,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12912 states to 12912 states and 18379 transitions. [2019-11-06 22:38:48,313 INFO L78 Accepts]: Start accepts. Automaton has 12912 states and 18379 transitions. Word has length 172 [2019-11-06 22:38:48,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:48,314 INFO L462 AbstractCegarLoop]: Abstraction has 12912 states and 18379 transitions. [2019-11-06 22:38:48,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:38:48,314 INFO L276 IsEmpty]: Start isEmpty. Operand 12912 states and 18379 transitions. [2019-11-06 22:38:48,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-11-06 22:38:48,347 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:48,347 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:48,347 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:48,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:48,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1195006296, now seen corresponding path program 1 times [2019-11-06 22:38:48,348 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:48,348 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480592286] [2019-11-06 22:38:48,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:48,479 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480592286] [2019-11-06 22:38:48,479 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197623640] [2019-11-06 22:38:48,479 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 22:38:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:48,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:38:48,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:38:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:38:48,911 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:38:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:38:48,983 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:38:48,983 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-06 22:38:48,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531531954] [2019-11-06 22:38:48,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:38:48,985 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:48,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:38:48,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:38:48,986 INFO L87 Difference]: Start difference. First operand 12912 states and 18379 transitions. Second operand 3 states. [2019-11-06 22:38:50,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:50,267 INFO L93 Difference]: Finished difference Result 31705 states and 46913 transitions. [2019-11-06 22:38:50,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:38:50,268 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 189 [2019-11-06 22:38:50,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:50,352 INFO L225 Difference]: With dead ends: 31705 [2019-11-06 22:38:50,352 INFO L226 Difference]: Without dead ends: 18799 [2019-11-06 22:38:50,390 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 376 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 22:38:50,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18799 states. [2019-11-06 22:38:50,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18799 to 18796. [2019-11-06 22:38:50,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18796 states. [2019-11-06 22:38:50,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18796 states to 18796 states and 27557 transitions. [2019-11-06 22:38:50,981 INFO L78 Accepts]: Start accepts. Automaton has 18796 states and 27557 transitions. Word has length 189 [2019-11-06 22:38:50,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:50,982 INFO L462 AbstractCegarLoop]: Abstraction has 18796 states and 27557 transitions. [2019-11-06 22:38:50,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:38:50,982 INFO L276 IsEmpty]: Start isEmpty. Operand 18796 states and 27557 transitions. [2019-11-06 22:38:51,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-11-06 22:38:51,033 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:51,034 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:38:51,238 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:38:51,238 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:51,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:51,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1204066993, now seen corresponding path program 1 times [2019-11-06 22:38:51,239 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:51,239 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697900224] [2019-11-06 22:38:51,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 66 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:38:51,382 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697900224] [2019-11-06 22:38:51,382 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934952120] [2019-11-06 22:38:51,383 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 22:38:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:51,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:38:51,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:38:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-06 22:38:51,825 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:38:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-06 22:38:51,942 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:38:51,942 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-06 22:38:51,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017166290] [2019-11-06 22:38:51,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:38:51,944 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:51,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:38:51,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:38:51,945 INFO L87 Difference]: Start difference. First operand 18796 states and 27557 transitions. Second operand 3 states. [2019-11-06 22:38:53,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:53,430 INFO L93 Difference]: Finished difference Result 50351 states and 74898 transitions. [2019-11-06 22:38:53,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:38:53,430 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2019-11-06 22:38:53,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:53,557 INFO L225 Difference]: With dead ends: 50351 [2019-11-06 22:38:53,557 INFO L226 Difference]: Without dead ends: 31561 [2019-11-06 22:38:53,606 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 430 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 22:38:53,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31561 states. [2019-11-06 22:38:54,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31561 to 31531. [2019-11-06 22:38:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31531 states. [2019-11-06 22:38:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31531 states to 31531 states and 46377 transitions. [2019-11-06 22:38:54,352 INFO L78 Accepts]: Start accepts. Automaton has 31531 states and 46377 transitions. Word has length 216 [2019-11-06 22:38:54,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:54,353 INFO L462 AbstractCegarLoop]: Abstraction has 31531 states and 46377 transitions. [2019-11-06 22:38:54,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:38:54,353 INFO L276 IsEmpty]: Start isEmpty. Operand 31531 states and 46377 transitions. [2019-11-06 22:38:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-11-06 22:38:55,401 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:55,401 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:38:55,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:38:55,605 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:55,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:55,606 INFO L82 PathProgramCache]: Analyzing trace with hash 627733957, now seen corresponding path program 1 times [2019-11-06 22:38:55,606 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:55,607 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914714053] [2019-11-06 22:38:55,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:55,812 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914714053] [2019-11-06 22:38:55,812 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:55,812 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:38:55,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998919374] [2019-11-06 22:38:55,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:38:55,814 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:55,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:38:55,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:38:55,814 INFO L87 Difference]: Start difference. First operand 31531 states and 46377 transitions. Second operand 6 states. [2019-11-06 22:38:57,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:57,519 INFO L93 Difference]: Finished difference Result 63365 states and 95333 transitions. [2019-11-06 22:38:57,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:38:57,520 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 216 [2019-11-06 22:38:57,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:57,640 INFO L225 Difference]: With dead ends: 63365 [2019-11-06 22:38:57,640 INFO L226 Difference]: Without dead ends: 31840 [2019-11-06 22:38:57,690 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 22:38:57,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31840 states. [2019-11-06 22:38:58,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31840 to 31641. [2019-11-06 22:38:58,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31641 states. [2019-11-06 22:38:58,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31641 states to 31641 states and 43132 transitions. [2019-11-06 22:38:58,581 INFO L78 Accepts]: Start accepts. Automaton has 31641 states and 43132 transitions. Word has length 216 [2019-11-06 22:38:58,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:58,582 INFO L462 AbstractCegarLoop]: Abstraction has 31641 states and 43132 transitions. [2019-11-06 22:38:58,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:38:58,582 INFO L276 IsEmpty]: Start isEmpty. Operand 31641 states and 43132 transitions. [2019-11-06 22:38:58,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-11-06 22:38:58,610 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:58,610 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:58,611 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:58,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:58,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1564408529, now seen corresponding path program 1 times [2019-11-06 22:38:58,611 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:58,612 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838593461] [2019-11-06 22:38:58,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:38:58,738 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838593461] [2019-11-06 22:38:58,738 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729349720] [2019-11-06 22:38:58,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:38:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:58,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 1213 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:38:58,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:38:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:38:59,077 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:38:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:38:59,183 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1026328882] [2019-11-06 22:38:59,189 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 226 [2019-11-06 22:38:59,252 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:38:59,252 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)