/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/Problem15_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:52:39,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:52:39,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:52:39,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:52:39,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:52:39,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:52:39,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:52:39,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:52:39,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:52:39,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:52:39,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:52:39,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:52:39,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:52:39,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:52:39,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:52:39,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:52:39,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:52:39,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:52:39,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:52:39,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:52:39,588 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 22:52:39,612 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:52:39,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:52:39,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:52:39,615 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:52:39,615 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:52:39,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:52:39,615 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:52:39,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:52:39,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:52:39,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:52:39,617 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:52:39,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:52:39,618 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:52:39,618 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:52:39,618 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:52:39,618 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:52:39,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:52:39,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:52:39,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:52:39,619 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:52:39,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:52:39,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:52:39,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:52:39,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:52:39,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:52:39,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:52:39,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:52:39,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:52:39,621 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 22:52:39,954 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:52:39,974 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:52:39,978 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:52:39,979 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:52:39,979 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:52:39,980 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label33.c [2019-11-06 22:52:40,054 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e758d750/69442985c34d41c08af6147b0c6dc536/FLAG704ea8757 [2019-11-06 22:52:40,672 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:52:40,674 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label33.c [2019-11-06 22:52:40,699 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e758d750/69442985c34d41c08af6147b0c6dc536/FLAG704ea8757 [2019-11-06 22:52:40,881 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e758d750/69442985c34d41c08af6147b0c6dc536 [2019-11-06 22:52:40,891 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:52:40,893 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:52:40,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:52:40,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:52:40,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:52:40,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:40" (1/1) ... [2019-11-06 22:52:40,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2406b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:40, skipping insertion in model container [2019-11-06 22:52:40,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:40" (1/1) ... [2019-11-06 22:52:40,910 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:52:40,999 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:52:41,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:52:41,904 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:52:42,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:52:42,298 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:52:42,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42 WrapperNode [2019-11-06 22:52:42,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:52:42,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:52:42,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:52:42,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:52:42,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (1/1) ... [2019-11-06 22:52:42,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (1/1) ... [2019-11-06 22:52:42,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (1/1) ... [2019-11-06 22:52:42,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (1/1) ... [2019-11-06 22:52:42,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (1/1) ... [2019-11-06 22:52:42,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (1/1) ... [2019-11-06 22:52:42,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (1/1) ... [2019-11-06 22:52:42,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:52:42,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:52:42,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:52:42,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:52:42,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (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 22:52:42,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:52:42,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:52:42,592 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:52:42,592 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:52:42,592 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:52:42,593 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:52:42,593 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:52:42,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:52:42,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:52:42,594 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:52:42,595 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:52:42,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:52:42,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:52:46,549 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:52:46,550 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:52:46,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:46 BoogieIcfgContainer [2019-11-06 22:52:46,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:52:46,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:52:46,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:52:46,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:52:46,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:52:40" (1/3) ... [2019-11-06 22:52:46,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65459721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:46, skipping insertion in model container [2019-11-06 22:52:46,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (2/3) ... [2019-11-06 22:52:46,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65459721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:46, skipping insertion in model container [2019-11-06 22:52:46,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:46" (3/3) ... [2019-11-06 22:52:46,568 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label33.c [2019-11-06 22:52:46,578 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:52:46,586 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:52:46,598 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:52:46,646 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:52:46,646 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:52:46,646 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:52:46,646 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:52:46,647 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:52:46,647 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:52:46,647 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:52:46,647 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:52:46,671 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 22:52:46,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 22:52:46,677 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:46,678 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] [2019-11-06 22:52:46,680 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:46,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:46,686 INFO L82 PathProgramCache]: Analyzing trace with hash 726540760, now seen corresponding path program 1 times [2019-11-06 22:52:46,694 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:46,695 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679003322] [2019-11-06 22:52:46,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:46,926 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 22:52:46,927 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679003322] [2019-11-06 22:52:46,928 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:52:46,928 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:52:46,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495126207] [2019-11-06 22:52:46,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:52:46,936 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:52:46,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:52:46,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:52:46,952 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-11-06 22:52:51,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:52:51,392 INFO L93 Difference]: Finished difference Result 1546 states and 2831 transitions. [2019-11-06 22:52:51,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:52:51,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-11-06 22:52:51,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:52:51,427 INFO L225 Difference]: With dead ends: 1546 [2019-11-06 22:52:51,427 INFO L226 Difference]: Without dead ends: 1028 [2019-11-06 22:52:51,440 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:52:51,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2019-11-06 22:52:51,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 700. [2019-11-06 22:52:51,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2019-11-06 22:52:51,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1110 transitions. [2019-11-06 22:52:51,573 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1110 transitions. Word has length 28 [2019-11-06 22:52:51,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:52:51,573 INFO L462 AbstractCegarLoop]: Abstraction has 700 states and 1110 transitions. [2019-11-06 22:52:51,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:52:51,574 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1110 transitions. [2019-11-06 22:52:51,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-06 22:52:51,579 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:51,579 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:52:51,580 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:51,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:51,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1804858835, now seen corresponding path program 1 times [2019-11-06 22:52:51,581 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:51,581 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291582438] [2019-11-06 22:52:51,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:52:51,800 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291582438] [2019-11-06 22:52:51,801 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:52:51,801 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:52:51,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157904074] [2019-11-06 22:52:51,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:52:51,803 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:52:51,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:52:51,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:52:51,804 INFO L87 Difference]: Start difference. First operand 700 states and 1110 transitions. Second operand 5 states. [2019-11-06 22:52:55,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:52:55,459 INFO L93 Difference]: Finished difference Result 2057 states and 3297 transitions. [2019-11-06 22:52:55,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:52:55,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 100 [2019-11-06 22:52:55,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:52:55,473 INFO L225 Difference]: With dead ends: 2057 [2019-11-06 22:52:55,474 INFO L226 Difference]: Without dead ends: 1363 [2019-11-06 22:52:55,478 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 22:52:55,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2019-11-06 22:52:55,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1333. [2019-11-06 22:52:55,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1333 states. [2019-11-06 22:52:55,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1846 transitions. [2019-11-06 22:52:55,545 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1846 transitions. Word has length 100 [2019-11-06 22:52:55,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:52:55,546 INFO L462 AbstractCegarLoop]: Abstraction has 1333 states and 1846 transitions. [2019-11-06 22:52:55,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:52:55,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1846 transitions. [2019-11-06 22:52:55,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-06 22:52:55,550 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:55,550 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:52:55,551 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:55,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:55,551 INFO L82 PathProgramCache]: Analyzing trace with hash 278762691, now seen corresponding path program 1 times [2019-11-06 22:52:55,551 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:55,552 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743131886] [2019-11-06 22:52:55,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:55,789 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:52:55,790 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743131886] [2019-11-06 22:52:55,791 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:52:55,791 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:52:55,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506153147] [2019-11-06 22:52:55,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:52:55,794 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:52:55,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:52:55,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:52:55,795 INFO L87 Difference]: Start difference. First operand 1333 states and 1846 transitions. Second operand 5 states. [2019-11-06 22:53:01,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:01,505 INFO L93 Difference]: Finished difference Result 5790 states and 8308 transitions. [2019-11-06 22:53:01,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:53:01,508 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2019-11-06 22:53:01,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:01,531 INFO L225 Difference]: With dead ends: 5790 [2019-11-06 22:53:01,531 INFO L226 Difference]: Without dead ends: 4463 [2019-11-06 22:53:01,536 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:53:01,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4463 states. [2019-11-06 22:53:01,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4463 to 4446. [2019-11-06 22:53:01,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4446 states. [2019-11-06 22:53:01,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4446 states to 4446 states and 6041 transitions. [2019-11-06 22:53:01,687 INFO L78 Accepts]: Start accepts. Automaton has 4446 states and 6041 transitions. Word has length 108 [2019-11-06 22:53:01,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:01,688 INFO L462 AbstractCegarLoop]: Abstraction has 4446 states and 6041 transitions. [2019-11-06 22:53:01,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:53:01,689 INFO L276 IsEmpty]: Start isEmpty. Operand 4446 states and 6041 transitions. [2019-11-06 22:53:01,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-11-06 22:53:01,700 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:01,702 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, 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] [2019-11-06 22:53:01,702 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:01,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:01,702 INFO L82 PathProgramCache]: Analyzing trace with hash -309550926, now seen corresponding path program 1 times [2019-11-06 22:53:01,703 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:01,703 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153711516] [2019-11-06 22:53:01,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-06 22:53:01,922 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153711516] [2019-11-06 22:53:01,923 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:01,923 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:53:01,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422273509] [2019-11-06 22:53:01,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:53:01,926 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:01,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:53:01,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:53:01,927 INFO L87 Difference]: Start difference. First operand 4446 states and 6041 transitions. Second operand 4 states. [2019-11-06 22:53:05,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:05,543 INFO L93 Difference]: Finished difference Result 16909 states and 23602 transitions. [2019-11-06 22:53:05,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:53:05,549 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 186 [2019-11-06 22:53:05,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:05,610 INFO L225 Difference]: With dead ends: 16909 [2019-11-06 22:53:05,611 INFO L226 Difference]: Without dead ends: 12469 [2019-11-06 22:53:05,624 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:53:05,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12469 states. [2019-11-06 22:53:05,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12469 to 10621. [2019-11-06 22:53:05,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10621 states. [2019-11-06 22:53:05,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10621 states to 10621 states and 14179 transitions. [2019-11-06 22:53:05,926 INFO L78 Accepts]: Start accepts. Automaton has 10621 states and 14179 transitions. Word has length 186 [2019-11-06 22:53:05,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:05,928 INFO L462 AbstractCegarLoop]: Abstraction has 10621 states and 14179 transitions. [2019-11-06 22:53:05,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:53:05,928 INFO L276 IsEmpty]: Start isEmpty. Operand 10621 states and 14179 transitions. [2019-11-06 22:53:05,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2019-11-06 22:53:05,942 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:05,942 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, 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, 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, 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] [2019-11-06 22:53:05,943 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:05,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:05,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1298691159, now seen corresponding path program 1 times [2019-11-06 22:53:05,944 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:05,944 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254501593] [2019-11-06 22:53:05,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-11-06 22:53:06,489 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254501593] [2019-11-06 22:53:06,489 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435114221] [2019-11-06 22:53:06,489 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 22:53:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:06,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:53:06,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:53:07,034 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-11-06 22:53:07,035 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:53:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-11-06 22:53:07,655 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:53:07,655 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2019-11-06 22:53:07,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671632406] [2019-11-06 22:53:07,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:53:07,656 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:07,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:53:07,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:53:07,657 INFO L87 Difference]: Start difference. First operand 10621 states and 14179 transitions. Second operand 4 states. [2019-11-06 22:53:11,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:11,025 INFO L93 Difference]: Finished difference Result 27457 states and 37957 transitions. [2019-11-06 22:53:11,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:53:11,025 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 421 [2019-11-06 22:53:11,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:11,109 INFO L225 Difference]: With dead ends: 27457 [2019-11-06 22:53:11,109 INFO L226 Difference]: Without dead ends: 16842 [2019-11-06 22:53:11,137 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 846 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:53:11,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16842 states. [2019-11-06 22:53:11,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16842 to 14377. [2019-11-06 22:53:11,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14377 states. [2019-11-06 22:53:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14377 states to 14377 states and 19561 transitions. [2019-11-06 22:53:11,556 INFO L78 Accepts]: Start accepts. Automaton has 14377 states and 19561 transitions. Word has length 421 [2019-11-06 22:53:11,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:11,557 INFO L462 AbstractCegarLoop]: Abstraction has 14377 states and 19561 transitions. [2019-11-06 22:53:11,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:53:11,558 INFO L276 IsEmpty]: Start isEmpty. Operand 14377 states and 19561 transitions. [2019-11-06 22:53:11,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2019-11-06 22:53:11,571 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:11,571 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-11-06 22:53:11,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:53:11,775 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:11,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:11,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1246734372, now seen corresponding path program 1 times [2019-11-06 22:53:11,776 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:11,776 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494510917] [2019-11-06 22:53:11,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 274 proven. 43 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 22:53:12,720 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494510917] [2019-11-06 22:53:12,720 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708477383] [2019-11-06 22:53:12,720 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 22:53:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:12,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 22:53:12,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:53:12,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:53:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-11-06 22:53:13,248 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:53:13,366 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:13,367 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:13,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:13,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:13,400 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:13,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 63 proven. 187 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-11-06 22:53:14,254 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:53:14,255 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 14 [2019-11-06 22:53:14,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679509321] [2019-11-06 22:53:14,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:53:14,256 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:14,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:53:14,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:53:14,257 INFO L87 Difference]: Start difference. First operand 14377 states and 19561 transitions. Second operand 5 states.