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 -i ../../../trunk/examples/svcomp/array-examples/standard_init4_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 09:59:34,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 09:59:34,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 09:59:34,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-07 09:59:34,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 09:59:34,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 09:59:34,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 09:59:34,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 09:59:34,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 09:59:34,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 09:59:34,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 09:59:34,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 09:59:34,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 09:59:34,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 09:59:34,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 09:59:34,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 09:59:34,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 09:59:34,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 09:59:34,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 09:59:34,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 09:59:34,685 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 [2019-09-07 09:59:34,725 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 09:59:34,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 09:59:34,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 09:59:34,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 09:59:34,730 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 09:59:34,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 09:59:34,731 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 09:59:34,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 09:59:34,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 09:59:34,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 09:59:34,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 09:59:34,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 09:59:34,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 09:59:34,732 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 09:59:34,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 09:59:34,734 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 09:59:34,735 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 09:59:34,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 09:59:34,735 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 09:59:34,735 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 09:59:34,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 09:59:34,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 09:59:34,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 09:59:34,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 09:59:34,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 09:59:34,736 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 09:59:34,737 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 09:59:34,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 09:59:34,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 09:59:34,775 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 09:59:34,787 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 09:59:34,791 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 09:59:34,793 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 09:59:34,793 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 09:59:34,794 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init4_ground-1.i [2019-09-07 09:59:34,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723de57d9/0ebf4676c98c42699ec724838bbb647a/FLAG753423d43 [2019-09-07 09:59:35,322 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 09:59:35,324 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init4_ground-1.i [2019-09-07 09:59:35,332 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723de57d9/0ebf4676c98c42699ec724838bbb647a/FLAG753423d43 [2019-09-07 09:59:35,665 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723de57d9/0ebf4676c98c42699ec724838bbb647a [2019-09-07 09:59:35,675 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 09:59:35,677 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 09:59:35,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 09:59:35,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 09:59:35,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 09:59:35,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:59:35" (1/1) ... [2019-09-07 09:59:35,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cac797e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:59:35, skipping insertion in model container [2019-09-07 09:59:35,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:59:35" (1/1) ... [2019-09-07 09:59:35,696 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 09:59:35,717 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 09:59:35,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:59:35,916 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 09:59:35,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:59:35,975 INFO L192 MainTranslator]: Completed translation [2019-09-07 09:59:35,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:59:35 WrapperNode [2019-09-07 09:59:35,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 09:59:35,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 09:59:35,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 09:59:35,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 09:59:36,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:59:35" (1/1) ... [2019-09-07 09:59:36,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:59:35" (1/1) ... [2019-09-07 09:59:36,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:59:35" (1/1) ... [2019-09-07 09:59:36,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:59:35" (1/1) ... [2019-09-07 09:59:36,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:59:35" (1/1) ... [2019-09-07 09:59:36,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:59:35" (1/1) ... [2019-09-07 09:59:36,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:59:35" (1/1) ... [2019-09-07 09:59:36,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 09:59:36,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 09:59:36,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 09:59:36,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 09:59:36,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:59:35" (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 [2019-09-07 09:59:36,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 09:59:36,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 09:59:36,198 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 09:59:36,199 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 09:59:36,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 09:59:36,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 09:59:36,199 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 09:59:36,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 09:59:36,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 09:59:36,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 09:59:36,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 09:59:36,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 09:59:36,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 09:59:36,575 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 09:59:36,575 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-07 09:59:36,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:59:36 BoogieIcfgContainer [2019-09-07 09:59:36,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 09:59:36,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 09:59:36,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 09:59:36,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 09:59:36,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 09:59:35" (1/3) ... [2019-09-07 09:59:36,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c84142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:59:36, skipping insertion in model container [2019-09-07 09:59:36,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:59:35" (2/3) ... [2019-09-07 09:59:36,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c84142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:59:36, skipping insertion in model container [2019-09-07 09:59:36,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:59:36" (3/3) ... [2019-09-07 09:59:36,584 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-1.i [2019-09-07 09:59:36,593 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 09:59:36,601 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 09:59:36,619 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 09:59:36,649 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 09:59:36,650 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 09:59:36,650 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 09:59:36,650 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 09:59:36,651 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 09:59:36,651 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 09:59:36,651 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 09:59:36,651 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 09:59:36,651 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 09:59:36,669 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-09-07 09:59:36,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-07 09:59:36,675 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:59:36,676 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:59:36,679 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:59:36,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:59:36,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1568614638, now seen corresponding path program 1 times [2019-09-07 09:59:36,688 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:59:36,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:59:36,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:36,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:59:36,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:59:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:59:36,821 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:59:36,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 09:59:36,824 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 09:59:36,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 09:59:36,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:59:36,837 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-09-07 09:59:36,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:59:36,864 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2019-09-07 09:59:36,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 09:59:36,865 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2019-09-07 09:59:36,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:59:36,872 INFO L225 Difference]: With dead ends: 51 [2019-09-07 09:59:36,873 INFO L226 Difference]: Without dead ends: 24 [2019-09-07 09:59:36,876 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:59:36,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-07 09:59:36,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-07 09:59:36,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-07 09:59:36,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-09-07 09:59:36,911 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 19 [2019-09-07 09:59:36,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:59:36,912 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-09-07 09:59:36,912 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 09:59:36,912 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-09-07 09:59:36,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-07 09:59:36,913 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:59:36,913 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:59:36,914 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:59:36,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:59:36,914 INFO L82 PathProgramCache]: Analyzing trace with hash -395002610, now seen corresponding path program 1 times [2019-09-07 09:59:36,915 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:59:36,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:59:36,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:36,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:59:36,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:59:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:59:36,976 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:59:36,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:59:36,978 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:59:36,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:59:36,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:59:36,979 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-09-07 09:59:37,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:59:37,076 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2019-09-07 09:59:37,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:59:37,078 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-09-07 09:59:37,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:59:37,079 INFO L225 Difference]: With dead ends: 45 [2019-09-07 09:59:37,080 INFO L226 Difference]: Without dead ends: 28 [2019-09-07 09:59:37,082 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:59:37,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-07 09:59:37,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-07 09:59:37,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-07 09:59:37,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-09-07 09:59:37,095 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2019-09-07 09:59:37,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:59:37,096 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-09-07 09:59:37,096 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:59:37,096 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-09-07 09:59:37,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-07 09:59:37,097 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:59:37,097 INFO L399 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] [2019-09-07 09:59:37,097 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:59:37,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:59:37,098 INFO L82 PathProgramCache]: Analyzing trace with hash 47445068, now seen corresponding path program 1 times [2019-09-07 09:59:37,098 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:59:37,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:59:37,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:37,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:59:37,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:59:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-07 09:59:37,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:59:37,205 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:59:37,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:59:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:59:37,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:59:37,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:59:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-07 09:59:37,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:59:37,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:59:37,312 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:59:37,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:59:37,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:59:37,315 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-09-07 09:59:37,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:59:37,441 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2019-09-07 09:59:37,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:59:37,442 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-09-07 09:59:37,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:59:37,444 INFO L225 Difference]: With dead ends: 52 [2019-09-07 09:59:37,444 INFO L226 Difference]: Without dead ends: 32 [2019-09-07 09:59:37,445 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:59:37,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-07 09:59:37,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-09-07 09:59:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-07 09:59:37,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-09-07 09:59:37,460 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2019-09-07 09:59:37,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:59:37,460 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-09-07 09:59:37,460 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:59:37,461 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-09-07 09:59:37,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-07 09:59:37,462 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:59:37,463 INFO L399 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] [2019-09-07 09:59:37,463 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:59:37,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:59:37,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1810840398, now seen corresponding path program 2 times [2019-09-07 09:59:37,464 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:59:37,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:59:37,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:37,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:59:37,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:59:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-07 09:59:37,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:59:37,578 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:59:37,593 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:59:37,624 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:59:37,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:59:37,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 09:59:37,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:59:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-07 09:59:37,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:59:37,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-07 09:59:37,653 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 09:59:37,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 09:59:37,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 09:59:37,654 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2019-09-07 09:59:37,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:59:37,747 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2019-09-07 09:59:37,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 09:59:37,748 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-09-07 09:59:37,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:59:37,749 INFO L225 Difference]: With dead ends: 59 [2019-09-07 09:59:37,749 INFO L226 Difference]: Without dead ends: 36 [2019-09-07 09:59:37,750 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 09:59:37,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-07 09:59:37,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-07 09:59:37,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-07 09:59:37,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-09-07 09:59:37,758 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2019-09-07 09:59:37,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:59:37,758 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-09-07 09:59:37,758 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 09:59:37,759 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-09-07 09:59:37,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-07 09:59:37,760 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:59:37,760 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:59:37,760 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:59:37,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:59:37,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1527698548, now seen corresponding path program 3 times [2019-09-07 09:59:37,761 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:59:37,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:59:37,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:37,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:59:37,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:59:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 09:59:37,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:59:37,841 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:59:37,861 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:59:37,913 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 09:59:37,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:59:37,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:59:37,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:59:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 09:59:37,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:59:37,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 09:59:37,963 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:59:37,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:59:37,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:59:37,964 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 7 states. [2019-09-07 09:59:38,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:59:38,068 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2019-09-07 09:59:38,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 09:59:38,069 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-09-07 09:59:38,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:59:38,070 INFO L225 Difference]: With dead ends: 66 [2019-09-07 09:59:38,072 INFO L226 Difference]: Without dead ends: 40 [2019-09-07 09:59:38,072 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:59:38,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-07 09:59:38,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-09-07 09:59:38,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-07 09:59:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2019-09-07 09:59:38,083 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 31 [2019-09-07 09:59:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:59:38,084 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2019-09-07 09:59:38,084 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:59:38,084 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2019-09-07 09:59:38,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-07 09:59:38,085 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:59:38,085 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:59:38,086 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:59:38,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:59:38,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1451349618, now seen corresponding path program 4 times [2019-09-07 09:59:38,087 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:59:38,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:59:38,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:38,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:59:38,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:59:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-09-07 09:59:38,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:59:38,227 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:59:38,247 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:59:38,279 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:59:38,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:59:38,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 09:59:38,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:59:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-09-07 09:59:38,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:59:38,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-07 09:59:38,315 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 09:59:38,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 09:59:38,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:59:38,316 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 8 states. [2019-09-07 09:59:38,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:59:38,403 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2019-09-07 09:59:38,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 09:59:38,404 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2019-09-07 09:59:38,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:59:38,405 INFO L225 Difference]: With dead ends: 73 [2019-09-07 09:59:38,405 INFO L226 Difference]: Without dead ends: 44 [2019-09-07 09:59:38,406 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:59:38,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-07 09:59:38,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-09-07 09:59:38,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-07 09:59:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-09-07 09:59:38,413 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 35 [2019-09-07 09:59:38,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:59:38,413 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-09-07 09:59:38,413 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 09:59:38,413 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-09-07 09:59:38,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-07 09:59:38,414 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:59:38,415 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:59:38,415 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:59:38,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:59:38,415 INFO L82 PathProgramCache]: Analyzing trace with hash 2058629836, now seen corresponding path program 5 times [2019-09-07 09:59:38,415 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:59:38,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:59:38,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:38,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:59:38,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:59:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-07 09:59:38,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:59:38,505 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:59:38,523 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:59:39,139 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-07 09:59:39,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:59:39,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 09:59:39,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:59:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (6)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:59:39,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:59:39,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-07 09:59:39,173 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 09:59:39,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 09:59:39,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 09:59:39,174 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2019-09-07 09:59:39,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:59:39,285 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2019-09-07 09:59:39,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 09:59:39,286 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2019-09-07 09:59:39,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:59:39,287 INFO L225 Difference]: With dead ends: 80 [2019-09-07 09:59:39,287 INFO L226 Difference]: Without dead ends: 48 [2019-09-07 09:59:39,289 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 09:59:39,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-07 09:59:39,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-07 09:59:39,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-07 09:59:39,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2019-09-07 09:59:39,303 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 39 [2019-09-07 09:59:39,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:59:39,303 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2019-09-07 09:59:39,303 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 09:59:39,304 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2019-09-07 09:59:39,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-07 09:59:39,305 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:59:39,305 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:59:39,305 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:59:39,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:59:39,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1129940942, now seen corresponding path program 6 times [2019-09-07 09:59:39,306 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:59:39,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:59:39,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:39,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:59:39,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:59:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-09-07 09:59:39,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:59:39,440 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:59:39,459 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:59:39,806 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-09-07 09:59:39,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:59:39,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:59:39,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:59:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-09-07 09:59:39,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:59:39,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-07 09:59:39,838 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 09:59:39,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 09:59:39,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:59:39,839 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 10 states. [2019-09-07 09:59:39,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:59:39,930 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2019-09-07 09:59:39,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 09:59:39,931 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2019-09-07 09:59:39,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:59:39,933 INFO L225 Difference]: With dead ends: 87 [2019-09-07 09:59:39,933 INFO L226 Difference]: Without dead ends: 52 [2019-09-07 09:59:39,934 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:59:39,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-07 09:59:39,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-09-07 09:59:39,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-07 09:59:39,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2019-09-07 09:59:39,945 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 43 [2019-09-07 09:59:39,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:59:39,945 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2019-09-07 09:59:39,945 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 09:59:39,945 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2019-09-07 09:59:39,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-07 09:59:39,947 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:59:39,947 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:59:39,947 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:59:39,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:59:39,948 INFO L82 PathProgramCache]: Analyzing trace with hash -2092627444, now seen corresponding path program 7 times [2019-09-07 09:59:39,948 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:59:39,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:59:39,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:39,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:59:39,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:59:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-09-07 09:59:40,078 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:59:40,078 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:59:40,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:59:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:59:40,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 09:59:40,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:59:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-09-07 09:59:40,169 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:59:40,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-07 09:59:40,170 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 09:59:40,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 09:59:40,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:59:40,171 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 11 states. [2019-09-07 09:59:40,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:59:40,275 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2019-09-07 09:59:40,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 09:59:40,275 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2019-09-07 09:59:40,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:59:40,276 INFO L225 Difference]: With dead ends: 94 [2019-09-07 09:59:40,276 INFO L226 Difference]: Without dead ends: 56 [2019-09-07 09:59:40,277 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:59:40,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-09-07 09:59:40,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-09-07 09:59:40,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-07 09:59:40,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2019-09-07 09:59:40,288 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 47 [2019-09-07 09:59:40,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:59:40,288 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2019-09-07 09:59:40,288 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 09:59:40,289 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2019-09-07 09:59:40,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-07 09:59:40,289 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:59:40,290 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:59:40,290 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:59:40,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:59:40,290 INFO L82 PathProgramCache]: Analyzing trace with hash 2092520974, now seen corresponding path program 8 times [2019-09-07 09:59:40,290 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:59:40,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:59:40,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:40,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:59:40,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:59:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-09-07 09:59:40,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:59:40,396 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:59:40,408 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:59:40,446 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:59:40,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:59:40,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 09:59:40,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:59:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:59:40,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:59:40,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-07 09:59:40,485 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:59:40,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:59:40,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:59:40,486 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 12 states. [2019-09-07 09:59:40,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:59:40,618 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2019-09-07 09:59:40,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 09:59:40,620 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2019-09-07 09:59:40,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:59:40,621 INFO L225 Difference]: With dead ends: 101 [2019-09-07 09:59:40,621 INFO L226 Difference]: Without dead ends: 60 [2019-09-07 09:59:40,622 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:59:40,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-07 09:59:40,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-09-07 09:59:40,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-07 09:59:40,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2019-09-07 09:59:40,640 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 51 [2019-09-07 09:59:40,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:59:40,642 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2019-09-07 09:59:40,642 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:59:40,642 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2019-09-07 09:59:40,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-07 09:59:40,643 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:59:40,644 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:59:40,644 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:59:40,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:59:40,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1825288524, now seen corresponding path program 9 times [2019-09-07 09:59:40,645 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:59:40,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:59:40,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:40,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:59:40,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:59:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-09-07 09:59:40,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:59:40,837 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:59:40,861 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:59:42,569 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-07 09:59:42,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:59:42,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 09:59:42,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:59:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-09-07 09:59:42,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:59:42,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-07 09:59:42,619 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 09:59:42,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 09:59:42,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 09:59:42,620 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 13 states. [2019-09-07 09:59:42,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:59:42,711 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2019-09-07 09:59:42,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 09:59:42,711 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2019-09-07 09:59:42,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:59:42,712 INFO L225 Difference]: With dead ends: 108 [2019-09-07 09:59:42,712 INFO L226 Difference]: Without dead ends: 64 [2019-09-07 09:59:42,713 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 09:59:42,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-07 09:59:42,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-09-07 09:59:42,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-07 09:59:42,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-09-07 09:59:42,720 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 55 [2019-09-07 09:59:42,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:59:42,720 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-09-07 09:59:42,720 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 09:59:42,720 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-09-07 09:59:42,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-07 09:59:42,721 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:59:42,721 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:59:42,722 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:59:42,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:59:42,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1177185202, now seen corresponding path program 10 times [2019-09-07 09:59:42,722 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:59:42,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:59:42,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:42,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:59:42,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:59:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-09-07 09:59:42,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:59:42,867 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:59:42,889 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:59:42,927 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:59:42,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:59:42,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 09:59:42,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:59:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-09-07 09:59:42,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:59:42,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-07 09:59:42,965 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 09:59:42,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 09:59:42,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 09:59:42,967 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 14 states. [2019-09-07 09:59:43,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:59:43,062 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2019-09-07 09:59:43,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 09:59:43,063 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2019-09-07 09:59:43,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:59:43,064 INFO L225 Difference]: With dead ends: 115 [2019-09-07 09:59:43,064 INFO L226 Difference]: Without dead ends: 68 [2019-09-07 09:59:43,065 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 09:59:43,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-07 09:59:43,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-09-07 09:59:43,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-07 09:59:43,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2019-09-07 09:59:43,072 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 59 [2019-09-07 09:59:43,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:59:43,072 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2019-09-07 09:59:43,072 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 09:59:43,073 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2019-09-07 09:59:43,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-07 09:59:43,073 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:59:43,074 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:59:43,074 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:59:43,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:59:43,074 INFO L82 PathProgramCache]: Analyzing trace with hash 342894732, now seen corresponding path program 11 times [2019-09-07 09:59:43,074 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:59:43,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:59:43,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:43,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:59:43,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:59:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-09-07 09:59:43,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:59:43,229 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:59:43,243 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:59:57,474 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-07 09:59:57,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:59:57,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 09:59:57,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:59:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-09-07 09:59:57,520 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:59:57,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 09:59:57,521 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:59:57,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:59:57,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:59:57,522 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 15 states. [2019-09-07 09:59:57,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:59:57,632 INFO L93 Difference]: Finished difference Result 122 states and 133 transitions. [2019-09-07 09:59:57,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 09:59:57,632 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-09-07 09:59:57,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:59:57,633 INFO L225 Difference]: With dead ends: 122 [2019-09-07 09:59:57,633 INFO L226 Difference]: Without dead ends: 72 [2019-09-07 09:59:57,634 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:59:57,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-07 09:59:57,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-09-07 09:59:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-07 09:59:57,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-09-07 09:59:57,640 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 63 [2019-09-07 09:59:57,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:59:57,640 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-09-07 09:59:57,640 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:59:57,640 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-09-07 09:59:57,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-07 09:59:57,641 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:59:57,641 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:59:57,642 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:59:57,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:59:57,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1686898, now seen corresponding path program 12 times [2019-09-07 09:59:57,642 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:59:57,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:59:57,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:57,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:59:57,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:59:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:59:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2019-09-07 09:59:57,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:59:57,790 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:59:57,806 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 10:00:13,592 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-07 10:00:13,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:00:13,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 10:00:13,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:00:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 36 proven. 78 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-09-07 10:00:13,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:00:13,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 17 [2019-09-07 10:00:13,657 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 10:00:13,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 10:00:13,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 10:00:13,658 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 17 states. [2019-09-07 10:00:13,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:00:13,783 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2019-09-07 10:00:13,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 10:00:13,784 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2019-09-07 10:00:13,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:00:13,785 INFO L225 Difference]: With dead ends: 129 [2019-09-07 10:00:13,785 INFO L226 Difference]: Without dead ends: 76 [2019-09-07 10:00:13,786 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 10:00:13,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-07 10:00:13,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-09-07 10:00:13,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-07 10:00:13,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2019-09-07 10:00:13,799 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 67 [2019-09-07 10:00:13,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:00:13,799 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2019-09-07 10:00:13,799 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 10:00:13,800 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2019-09-07 10:00:13,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-07 10:00:13,800 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:00:13,800 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:00:13,801 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:00:13,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:00:13,801 INFO L82 PathProgramCache]: Analyzing trace with hash 106590156, now seen corresponding path program 13 times [2019-09-07 10:00:13,801 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:00:13,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:00:13,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:00:13,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:00:13,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:00:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:00:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2019-09-07 10:00:13,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:00:13,986 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:00:14,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:00:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:00:14,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 10:00:14,073 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:00:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2019-09-07 10:00:14,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:00:14,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-07 10:00:14,100 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 10:00:14,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 10:00:14,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 10:00:14,101 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 17 states. [2019-09-07 10:00:14,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:00:14,221 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2019-09-07 10:00:14,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 10:00:14,222 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2019-09-07 10:00:14,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:00:14,222 INFO L225 Difference]: With dead ends: 136 [2019-09-07 10:00:14,223 INFO L226 Difference]: Without dead ends: 80 [2019-09-07 10:00:14,223 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 10:00:14,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-09-07 10:00:14,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-09-07 10:00:14,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-09-07 10:00:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-09-07 10:00:14,230 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 71 [2019-09-07 10:00:14,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:00:14,230 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-09-07 10:00:14,230 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 10:00:14,230 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-09-07 10:00:14,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-07 10:00:14,231 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:00:14,231 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:00:14,231 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:00:14,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:00:14,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1965252814, now seen corresponding path program 14 times [2019-09-07 10:00:14,232 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:00:14,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:00:14,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:00:14,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:00:14,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:00:14,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:00:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-09-07 10:00:14,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:00:14,404 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:00:14,423 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:00:14,470 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:00:14,470 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:00:14,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 10:00:14,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:00:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-09-07 10:00:14,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:00:14,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-09-07 10:00:14,508 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-07 10:00:14,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-07 10:00:14,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 10:00:14,509 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 18 states. [2019-09-07 10:00:14,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:00:14,681 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2019-09-07 10:00:14,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 10:00:14,681 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2019-09-07 10:00:14,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:00:14,682 INFO L225 Difference]: With dead ends: 143 [2019-09-07 10:00:14,682 INFO L226 Difference]: Without dead ends: 84 [2019-09-07 10:00:14,683 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 10:00:14,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-07 10:00:14,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-09-07 10:00:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-07 10:00:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-09-07 10:00:14,691 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 75 [2019-09-07 10:00:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:00:14,691 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-09-07 10:00:14,691 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-07 10:00:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-09-07 10:00:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-07 10:00:14,692 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:00:14,692 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:00:14,692 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:00:14,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:00:14,693 INFO L82 PathProgramCache]: Analyzing trace with hash -38631668, now seen corresponding path program 15 times [2019-09-07 10:00:14,693 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:00:14,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:00:14,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:00:14,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:00:14,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:00:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:00:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2019-09-07 10:00:14,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:00:14,909 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:00:14,920 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:00:19,798 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-07 10:00:19,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:00:19,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 10:00:19,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:00:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 45 proven. 120 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-09-07 10:00:19,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:00:19,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 20 [2019-09-07 10:00:19,882 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 10:00:19,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 10:00:19,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:00:19,883 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 20 states. [2019-09-07 10:00:20,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:00:20,011 INFO L93 Difference]: Finished difference Result 150 states and 161 transitions. [2019-09-07 10:00:20,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 10:00:20,011 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2019-09-07 10:00:20,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:00:20,012 INFO L225 Difference]: With dead ends: 150 [2019-09-07 10:00:20,012 INFO L226 Difference]: Without dead ends: 88 [2019-09-07 10:00:20,014 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:00:20,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-07 10:00:20,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-09-07 10:00:20,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-09-07 10:00:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2019-09-07 10:00:20,021 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 79 [2019-09-07 10:00:20,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:00:20,023 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2019-09-07 10:00:20,023 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 10:00:20,024 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2019-09-07 10:00:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-07 10:00:20,024 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:00:20,024 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:00:20,025 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:00:20,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:00:20,026 INFO L82 PathProgramCache]: Analyzing trace with hash -523964658, now seen corresponding path program 16 times [2019-09-07 10:00:20,026 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:00:20,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:00:20,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:00:20,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:00:20,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:00:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:00:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-09-07 10:00:20,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:00:20,285 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:00:20,311 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:00:20,370 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:00:20,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:00:20,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 10:00:20,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:00:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-09-07 10:00:20,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:00:20,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 10:00:20,408 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 10:00:20,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 10:00:20,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:00:20,409 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 20 states. [2019-09-07 10:00:20,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:00:20,590 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2019-09-07 10:00:20,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 10:00:20,591 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 83 [2019-09-07 10:00:20,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:00:20,593 INFO L225 Difference]: With dead ends: 157 [2019-09-07 10:00:20,594 INFO L226 Difference]: Without dead ends: 92 [2019-09-07 10:00:20,594 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:00:20,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-09-07 10:00:20,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-09-07 10:00:20,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-07 10:00:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2019-09-07 10:00:20,600 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 83 [2019-09-07 10:00:20,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:00:20,600 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2019-09-07 10:00:20,600 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 10:00:20,601 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2019-09-07 10:00:20,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-07 10:00:20,601 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:00:20,601 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:00:20,602 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:00:20,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:00:20,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1688235596, now seen corresponding path program 17 times [2019-09-07 10:00:20,602 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:00:20,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:00:20,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:00:20,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:00:20,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:00:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:00:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2019-09-07 10:00:20,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:00:20,896 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:00:20,907 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 10:01:23,000 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-09-07 10:01:23,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:01:23,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 10:01:23,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:01:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2019-09-07 10:01:23,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:01:23,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-09-07 10:01:23,079 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 10:01:23,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 10:01:23,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 10:01:23,080 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 21 states. [2019-09-07 10:01:23,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:01:23,246 INFO L93 Difference]: Finished difference Result 164 states and 175 transitions. [2019-09-07 10:01:23,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 10:01:23,247 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2019-09-07 10:01:23,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:01:23,248 INFO L225 Difference]: With dead ends: 164 [2019-09-07 10:01:23,248 INFO L226 Difference]: Without dead ends: 96 [2019-09-07 10:01:23,249 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 10:01:23,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-09-07 10:01:23,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-09-07 10:01:23,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-07 10:01:23,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2019-09-07 10:01:23,257 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 87 [2019-09-07 10:01:23,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:01:23,258 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2019-09-07 10:01:23,258 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 10:01:23,258 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2019-09-07 10:01:23,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-07 10:01:23,262 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:01:23,262 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:01:23,262 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:01:23,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:01:23,262 INFO L82 PathProgramCache]: Analyzing trace with hash 721612110, now seen corresponding path program 18 times [2019-09-07 10:01:23,263 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:01:23,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:01:23,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:01:23,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:01:23,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:01:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:01:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2019-09-07 10:01:23,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:01:23,505 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:01:23,517 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 10:02:12,963 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-07 10:02:12,963 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:02:12,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 10:02:12,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:02:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2019-09-07 10:02:13,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:02:13,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-09-07 10:02:13,062 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 10:02:13,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 10:02:13,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 10:02:13,063 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 22 states. [2019-09-07 10:02:13,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:02:13,241 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2019-09-07 10:02:13,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 10:02:13,247 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 91 [2019-09-07 10:02:13,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:02:13,248 INFO L225 Difference]: With dead ends: 171 [2019-09-07 10:02:13,248 INFO L226 Difference]: Without dead ends: 100 [2019-09-07 10:02:13,249 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 10:02:13,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-07 10:02:13,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-09-07 10:02:13,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-07 10:02:13,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2019-09-07 10:02:13,254 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2019-09-07 10:02:13,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:02:13,254 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2019-09-07 10:02:13,255 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 10:02:13,255 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2019-09-07 10:02:13,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-07 10:02:13,256 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:02:13,256 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:02:13,256 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:02:13,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:02:13,256 INFO L82 PathProgramCache]: Analyzing trace with hash -733207156, now seen corresponding path program 19 times [2019-09-07 10:02:13,256 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:02:13,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:02:13,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:02:13,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:02:13,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:02:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:02:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2019-09-07 10:02:13,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:02:13,511 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:02:13,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:02:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:02:13,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 10:02:13,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:02:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (20)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:02:13,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:02:13,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-07 10:02:13,620 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 10:02:13,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 10:02:13,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:02:13,621 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 23 states. [2019-09-07 10:02:13,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:02:13,790 INFO L93 Difference]: Finished difference Result 178 states and 189 transitions. [2019-09-07 10:02:13,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 10:02:13,794 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 95 [2019-09-07 10:02:13,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:02:13,795 INFO L225 Difference]: With dead ends: 178 [2019-09-07 10:02:13,795 INFO L226 Difference]: Without dead ends: 104 [2019-09-07 10:02:13,797 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:02:13,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-07 10:02:13,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-09-07 10:02:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-09-07 10:02:13,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2019-09-07 10:02:13,803 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 95 [2019-09-07 10:02:13,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:02:13,803 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2019-09-07 10:02:13,803 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 10:02:13,803 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2019-09-07 10:02:13,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-07 10:02:13,804 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:02:13,804 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:02:13,805 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:02:13,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:02:13,805 INFO L82 PathProgramCache]: Analyzing trace with hash -585802866, now seen corresponding path program 20 times [2019-09-07 10:02:13,805 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:02:13,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:02:13,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:02:13,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:02:13,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:02:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:02:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-09-07 10:02:14,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:02:14,080 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:02:14,094 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:02:14,150 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:02:14,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:02:14,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 10:02:14,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:02:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (21)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:02:14,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:02:14,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-09-07 10:02:14,176 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 10:02:14,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 10:02:14,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 10:02:14,177 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 24 states. [2019-09-07 10:02:14,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:02:14,332 INFO L93 Difference]: Finished difference Result 185 states and 196 transitions. [2019-09-07 10:02:14,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 10:02:14,336 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2019-09-07 10:02:14,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:02:14,337 INFO L225 Difference]: With dead ends: 185 [2019-09-07 10:02:14,337 INFO L226 Difference]: Without dead ends: 108 [2019-09-07 10:02:14,338 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 10:02:14,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-09-07 10:02:14,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2019-09-07 10:02:14,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-09-07 10:02:14,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2019-09-07 10:02:14,343 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 99 [2019-09-07 10:02:14,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:02:14,343 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2019-09-07 10:02:14,343 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 10:02:14,344 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2019-09-07 10:02:14,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-07 10:02:14,344 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:02:14,345 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:02:14,345 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:02:14,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:02:14,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1797411636, now seen corresponding path program 21 times [2019-09-07 10:02:14,345 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:02:14,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:02:14,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:02:14,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:02:14,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:02:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:02:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2019-09-07 10:02:14,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:02:14,632 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:02:14,643 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:02:52,325 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 10:02:52,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:02:52,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 10:02:52,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:02:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2019-09-07 10:02:52,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:02:52,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-07 10:02:52,396 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 10:02:52,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 10:02:52,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 10:02:52,397 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 25 states. [2019-09-07 10:02:52,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:02:52,607 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2019-09-07 10:02:52,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-07 10:02:52,608 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 103 [2019-09-07 10:02:52,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:02:52,609 INFO L225 Difference]: With dead ends: 192 [2019-09-07 10:02:52,609 INFO L226 Difference]: Without dead ends: 112 [2019-09-07 10:02:52,610 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 10:02:52,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-09-07 10:02:52,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2019-09-07 10:02:52,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-09-07 10:02:52,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2019-09-07 10:02:52,616 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 103 [2019-09-07 10:02:52,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:02:52,617 INFO L475 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2019-09-07 10:02:52,617 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 10:02:52,617 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2019-09-07 10:02:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-07 10:02:52,618 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:02:52,618 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:02:52,619 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:02:52,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:02:52,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1590412850, now seen corresponding path program 22 times [2019-09-07 10:02:52,619 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:02:52,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:02:52,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:02:52,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:02:52,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:02:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:02:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2019-09-07 10:02:52,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:02:52,955 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:02:52,974 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:02:53,035 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:02:53,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:02:53,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 10:02:53,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:02:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2019-09-07 10:02:53,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:02:53,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-09-07 10:02:53,058 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 10:02:53,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 10:02:53,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 10:02:53,059 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 26 states. [2019-09-07 10:02:53,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:02:53,298 INFO L93 Difference]: Finished difference Result 199 states and 210 transitions. [2019-09-07 10:02:53,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 10:02:53,299 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 107 [2019-09-07 10:02:53,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:02:53,300 INFO L225 Difference]: With dead ends: 199 [2019-09-07 10:02:53,300 INFO L226 Difference]: Without dead ends: 116 [2019-09-07 10:02:53,301 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 10:02:53,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-09-07 10:02:53,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2019-09-07 10:02:53,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-09-07 10:02:53,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2019-09-07 10:02:53,306 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 107 [2019-09-07 10:02:53,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:02:53,307 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2019-09-07 10:02:53,307 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 10:02:53,307 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2019-09-07 10:02:53,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-09-07 10:02:53,308 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:02:53,309 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:02:53,309 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:02:53,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:02:53,309 INFO L82 PathProgramCache]: Analyzing trace with hash 494732300, now seen corresponding path program 23 times [2019-09-07 10:02:53,309 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:02:53,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:02:53,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:02:53,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:02:53,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:02:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:02:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2019-09-07 10:02:53,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:02:53,681 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:02:53,692 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 10:04:32,508 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-07 10:04:32,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:04:32,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 10:04:32,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:04:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2019-09-07 10:04:32,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:04:32,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-09-07 10:04:32,621 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 10:04:32,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 10:04:32,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 10:04:32,622 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 27 states. [2019-09-07 10:04:32,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:04:32,798 INFO L93 Difference]: Finished difference Result 206 states and 217 transitions. [2019-09-07 10:04:32,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 10:04:32,799 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 111 [2019-09-07 10:04:32,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:04:32,799 INFO L225 Difference]: With dead ends: 206 [2019-09-07 10:04:32,800 INFO L226 Difference]: Without dead ends: 120 [2019-09-07 10:04:32,800 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 10:04:32,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-09-07 10:04:32,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2019-09-07 10:04:32,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-09-07 10:04:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2019-09-07 10:04:32,806 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 111 [2019-09-07 10:04:32,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:04:32,806 INFO L475 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2019-09-07 10:04:32,807 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 10:04:32,807 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2019-09-07 10:04:32,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-07 10:04:32,808 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:04:32,808 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:04:32,808 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:04:32,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:04:32,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1030256626, now seen corresponding path program 24 times [2019-09-07 10:04:32,809 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:04:32,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:04:32,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:04:32,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:04:32,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:04:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:04:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-09-07 10:04:33,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:04:33,194 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:04:33,216 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:06:00,367 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-07 10:06:00,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:06:00,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-07 10:06:00,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 24 proven. 300 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-09-07 10:06:00,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:00,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 29 [2019-09-07 10:06:00,463 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-07 10:06:00,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-07 10:06:00,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 10:06:00,464 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 29 states. [2019-09-07 10:06:00,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:00,709 INFO L93 Difference]: Finished difference Result 213 states and 224 transitions. [2019-09-07 10:06:00,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 10:06:00,710 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2019-09-07 10:06:00,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:00,713 INFO L225 Difference]: With dead ends: 213 [2019-09-07 10:06:00,713 INFO L226 Difference]: Without dead ends: 124 [2019-09-07 10:06:00,714 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 10:06:00,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-09-07 10:06:00,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2019-09-07 10:06:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-09-07 10:06:00,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2019-09-07 10:06:00,720 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 115 [2019-09-07 10:06:00,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:00,721 INFO L475 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2019-09-07 10:06:00,721 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-07 10:06:00,722 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2019-09-07 10:06:00,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-07 10:06:00,723 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:00,723 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:06:00,723 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:00,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:00,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1806554292, now seen corresponding path program 25 times [2019-09-07 10:06:00,724 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:00,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:00,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:00,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:06:00,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2019-09-07 10:06:01,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:01,188 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:06:01,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:06:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:01,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 10:06:01,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2019-09-07 10:06:01,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:01,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-09-07 10:06:01,320 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-07 10:06:01,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-07 10:06:01,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 10:06:01,323 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand 29 states. [2019-09-07 10:06:01,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:01,507 INFO L93 Difference]: Finished difference Result 220 states and 231 transitions. [2019-09-07 10:06:01,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 10:06:01,508 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 119 [2019-09-07 10:06:01,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:01,509 INFO L225 Difference]: With dead ends: 220 [2019-09-07 10:06:01,509 INFO L226 Difference]: Without dead ends: 128 [2019-09-07 10:06:01,510 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 10:06:01,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-09-07 10:06:01,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2019-09-07 10:06:01,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-09-07 10:06:01,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2019-09-07 10:06:01,516 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 119 [2019-09-07 10:06:01,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:01,516 INFO L475 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2019-09-07 10:06:01,516 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-07 10:06:01,517 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2019-09-07 10:06:01,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-07 10:06:01,518 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:01,518 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:06:01,518 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:01,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:01,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1384692146, now seen corresponding path program 26 times [2019-09-07 10:06:01,518 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:01,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:01,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:01,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:06:01,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2019-09-07 10:06:01,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:01,986 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:06:02,011 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:06:02,083 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:06:02,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:06:02,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 10:06:02,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (27)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:06:02,120 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:02,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-09-07 10:06:02,120 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 10:06:02,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 10:06:02,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 10:06:02,121 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 30 states. [2019-09-07 10:06:02,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:02,356 INFO L93 Difference]: Finished difference Result 227 states and 238 transitions. [2019-09-07 10:06:02,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-07 10:06:02,356 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 123 [2019-09-07 10:06:02,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:02,358 INFO L225 Difference]: With dead ends: 227 [2019-09-07 10:06:02,358 INFO L226 Difference]: Without dead ends: 132 [2019-09-07 10:06:02,358 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 10:06:02,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-09-07 10:06:02,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2019-09-07 10:06:02,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-09-07 10:06:02,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2019-09-07 10:06:02,363 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 123 [2019-09-07 10:06:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:02,363 INFO L475 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2019-09-07 10:06:02,363 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 10:06:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2019-09-07 10:06:02,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-09-07 10:06:02,364 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:02,364 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:06:02,364 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:02,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:02,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1317347980, now seen corresponding path program 27 times [2019-09-07 10:06:02,364 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:02,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:02,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:02,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:06:02,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2019-09-07 10:06:02,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:02,939 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:06:02,954 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:07:06,257 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-09-07 10:07:06,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:07:06,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 10:07:06,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:07:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 27 proven. 378 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2019-09-07 10:07:06,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:07:06,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 32 [2019-09-07 10:07:06,367 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-07 10:07:06,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-07 10:07:06,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:07:06,368 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 32 states. [2019-09-07 10:07:06,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:07:06,590 INFO L93 Difference]: Finished difference Result 234 states and 245 transitions. [2019-09-07 10:07:06,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 10:07:06,591 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 127 [2019-09-07 10:07:06,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:07:06,592 INFO L225 Difference]: With dead ends: 234 [2019-09-07 10:07:06,593 INFO L226 Difference]: Without dead ends: 136 [2019-09-07 10:07:06,594 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:07:06,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-09-07 10:07:06,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2019-09-07 10:07:06,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-09-07 10:07:06,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2019-09-07 10:07:06,610 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 127 [2019-09-07 10:07:06,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:07:06,610 INFO L475 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2019-09-07 10:07:06,610 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-07 10:07:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2019-09-07 10:07:06,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-09-07 10:07:06,613 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:07:06,613 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:07:06,613 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:07:06,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:07:06,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1863021710, now seen corresponding path program 28 times [2019-09-07 10:07:06,614 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:07:06,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:07:06,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:07:06,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:07:06,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:07:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:07:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2019-09-07 10:07:07,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:07:07,347 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:07:07,386 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:07:07,494 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:07:07,494 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:07:07,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 10:07:07,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:07:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2019-09-07 10:07:07,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:07:07,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-09-07 10:07:07,559 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-07 10:07:07,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-07 10:07:07,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:07:07,560 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 32 states. [2019-09-07 10:07:07,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:07:07,829 INFO L93 Difference]: Finished difference Result 241 states and 252 transitions. [2019-09-07 10:07:07,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 10:07:07,830 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 131 [2019-09-07 10:07:07,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:07:07,831 INFO L225 Difference]: With dead ends: 241 [2019-09-07 10:07:07,832 INFO L226 Difference]: Without dead ends: 140 [2019-09-07 10:07:07,834 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:07:07,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-09-07 10:07:07,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2019-09-07 10:07:07,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-09-07 10:07:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2019-09-07 10:07:07,842 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 131 [2019-09-07 10:07:07,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:07:07,843 INFO L475 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2019-09-07 10:07:07,843 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-07 10:07:07,843 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2019-09-07 10:07:07,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-09-07 10:07:07,845 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:07:07,846 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:07:07,846 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:07:07,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:07:07,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1346234828, now seen corresponding path program 29 times [2019-09-07 10:07:07,847 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:07:07,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:07:07,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:07:07,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:07:07,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:07:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:07:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2019-09-07 10:07:08,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:07:08,465 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:07:08,475 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 10:09:22,812 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-09-07 10:09:22,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:09:22,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-07 10:09:22,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:09:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2019-09-07 10:09:22,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:09:22,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-09-07 10:09:22,967 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-07 10:09:22,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-07 10:09:22,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 10:09:22,968 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand 33 states. [2019-09-07 10:09:23,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:09:23,239 INFO L93 Difference]: Finished difference Result 248 states and 259 transitions. [2019-09-07 10:09:23,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-07 10:09:23,239 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2019-09-07 10:09:23,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:09:23,240 INFO L225 Difference]: With dead ends: 248 [2019-09-07 10:09:23,240 INFO L226 Difference]: Without dead ends: 144 [2019-09-07 10:09:23,241 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 10:09:23,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-09-07 10:09:23,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2019-09-07 10:09:23,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-09-07 10:09:23,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2019-09-07 10:09:23,247 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 135 [2019-09-07 10:09:23,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:09:23,247 INFO L475 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2019-09-07 10:09:23,247 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-07 10:09:23,248 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2019-09-07 10:09:23,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-09-07 10:09:23,249 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:09:23,249 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:09:23,250 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:09:23,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:09:23,251 INFO L82 PathProgramCache]: Analyzing trace with hash 898372302, now seen corresponding path program 30 times [2019-09-07 10:09:23,251 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:09:23,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:09:23,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:09:23,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:09:23,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:09:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:09:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2019-09-07 10:09:23,813 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:09:23,813 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:09:23,831 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:11:30,470 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-09-07 10:11:30,470 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:11:30,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 10:11:30,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:11:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2019-09-07 10:11:30,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:11:30,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-09-07 10:11:30,611 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-07 10:11:30,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-07 10:11:30,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 10:11:30,612 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand 34 states. [2019-09-07 10:11:30,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:11:30,851 INFO L93 Difference]: Finished difference Result 255 states and 266 transitions. [2019-09-07 10:11:30,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-07 10:11:30,852 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 139 [2019-09-07 10:11:30,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:11:30,853 INFO L225 Difference]: With dead ends: 255 [2019-09-07 10:11:30,853 INFO L226 Difference]: Without dead ends: 148 [2019-09-07 10:11:30,854 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 10:11:30,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-09-07 10:11:30,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2019-09-07 10:11:30,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-09-07 10:11:30,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2019-09-07 10:11:30,859 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 139 [2019-09-07 10:11:30,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:11:30,860 INFO L475 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2019-09-07 10:11:30,860 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-07 10:11:30,860 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2019-09-07 10:11:30,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-09-07 10:11:30,861 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:11:30,862 INFO L399 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:11:30,862 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:11:30,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:11:30,862 INFO L82 PathProgramCache]: Analyzing trace with hash -861634292, now seen corresponding path program 31 times [2019-09-07 10:11:30,862 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:11:30,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:11:30,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:11:30,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:11:30,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:11:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:11:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1488 trivial. 0 not checked. [2019-09-07 10:11:31,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:11:31,571 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:11:31,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:11:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:11:31,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-07 10:11:31,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:11:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1488 trivial. 0 not checked. [2019-09-07 10:11:31,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:11:31,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-09-07 10:11:31,764 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-07 10:11:31,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-07 10:11:31,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-09-07 10:11:31,766 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 35 states. [2019-09-07 10:11:32,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:11:32,023 INFO L93 Difference]: Finished difference Result 262 states and 273 transitions. [2019-09-07 10:11:32,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-07 10:11:32,024 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 143 [2019-09-07 10:11:32,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:11:32,025 INFO L225 Difference]: With dead ends: 262 [2019-09-07 10:11:32,025 INFO L226 Difference]: Without dead ends: 152 [2019-09-07 10:11:32,026 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-09-07 10:11:32,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-09-07 10:11:32,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2019-09-07 10:11:32,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-09-07 10:11:32,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2019-09-07 10:11:32,035 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 143 [2019-09-07 10:11:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:11:32,035 INFO L475 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2019-09-07 10:11:32,035 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-07 10:11:32,035 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2019-09-07 10:11:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-09-07 10:11:32,037 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:11:32,037 INFO L399 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:11:32,037 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:11:32,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:11:32,038 INFO L82 PathProgramCache]: Analyzing trace with hash -802086642, now seen corresponding path program 32 times [2019-09-07 10:11:32,038 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:11:32,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:11:32,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:11:32,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:11:32,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:11:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:11:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1584 trivial. 0 not checked. [2019-09-07 10:11:32,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:11:32,826 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:11:32,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:11:32,943 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:11:32,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:11:32,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-07 10:11:32,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:11:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1584 trivial. 0 not checked. [2019-09-07 10:11:32,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:11:32,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-09-07 10:11:32,995 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-07 10:11:32,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-07 10:11:32,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 10:11:32,996 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 36 states. [2019-09-07 10:11:33,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:11:33,286 INFO L93 Difference]: Finished difference Result 269 states and 280 transitions. [2019-09-07 10:11:33,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-07 10:11:33,286 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 147 [2019-09-07 10:11:33,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:11:33,287 INFO L225 Difference]: With dead ends: 269 [2019-09-07 10:11:33,287 INFO L226 Difference]: Without dead ends: 156 [2019-09-07 10:11:33,288 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 10:11:33,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-09-07 10:11:33,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2019-09-07 10:11:33,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-09-07 10:11:33,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2019-09-07 10:11:33,293 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 147 [2019-09-07 10:11:33,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:11:33,293 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2019-09-07 10:11:33,293 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-07 10:11:33,294 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2019-09-07 10:11:33,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-09-07 10:11:33,294 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:11:33,294 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:11:33,294 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:11:33,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:11:33,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1511987124, now seen corresponding path program 33 times [2019-09-07 10:11:33,295 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:11:33,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:11:33,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:11:33,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:11:33,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:11:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:11:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2019-09-07 10:11:34,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:11:34,210 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:11:34,242 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:13:07,334 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-09-07 10:13:07,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:13:07,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-07 10:13:07,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:13:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2019-09-07 10:13:07,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:13:07,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-09-07 10:13:07,413 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-07 10:13:07,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-07 10:13:07,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 10:13:07,414 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 37 states. [2019-09-07 10:13:07,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:13:07,713 INFO L93 Difference]: Finished difference Result 276 states and 287 transitions. [2019-09-07 10:13:07,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 10:13:07,714 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 151 [2019-09-07 10:13:07,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:13:07,715 INFO L225 Difference]: With dead ends: 276 [2019-09-07 10:13:07,715 INFO L226 Difference]: Without dead ends: 160 [2019-09-07 10:13:07,716 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 10:13:07,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-09-07 10:13:07,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2019-09-07 10:13:07,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-09-07 10:13:07,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2019-09-07 10:13:07,727 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 151 [2019-09-07 10:13:07,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:13:07,728 INFO L475 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2019-09-07 10:13:07,728 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-07 10:13:07,728 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2019-09-07 10:13:07,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-09-07 10:13:07,729 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:13:07,729 INFO L399 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:13:07,729 INFO L418 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:13:07,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:13:07,730 INFO L82 PathProgramCache]: Analyzing trace with hash 791846734, now seen corresponding path program 34 times [2019-09-07 10:13:07,730 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:13:07,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:13:07,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:07,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:13:07,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 1785 trivial. 0 not checked. [2019-09-07 10:13:08,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:13:08,488 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:13:08,498 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:13:08,592 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:13:08,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:13:08,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-07 10:13:08,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:13:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 1785 trivial. 0 not checked. [2019-09-07 10:13:08,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:13:08,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-09-07 10:13:08,630 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-07 10:13:08,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-07 10:13:08,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 10:13:08,631 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 38 states. [2019-09-07 10:13:08,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:13:08,931 INFO L93 Difference]: Finished difference Result 283 states and 294 transitions. [2019-09-07 10:13:08,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-07 10:13:08,932 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 155 [2019-09-07 10:13:08,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:13:08,933 INFO L225 Difference]: With dead ends: 283 [2019-09-07 10:13:08,933 INFO L226 Difference]: Without dead ends: 164 [2019-09-07 10:13:08,934 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 10:13:08,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-09-07 10:13:08,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2019-09-07 10:13:08,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-09-07 10:13:08,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2019-09-07 10:13:08,939 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 155 [2019-09-07 10:13:08,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:13:08,939 INFO L475 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2019-09-07 10:13:08,939 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-07 10:13:08,939 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2019-09-07 10:13:08,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-09-07 10:13:08,940 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:13:08,941 INFO L399 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:13:08,941 INFO L418 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:13:08,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:13:08,941 INFO L82 PathProgramCache]: Analyzing trace with hash -316989556, now seen corresponding path program 35 times [2019-09-07 10:13:08,941 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:13:08,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:13:08,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:08,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:13:08,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2019-09-07 10:13:09,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:13:09,540 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:13:09,550 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1