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-industry-pattern/array_mul_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 10:44:16,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 10:44:16,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 10:44:16,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-07 10:44:16,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 10:44:16,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 10:44:16,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 10:44:16,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 10:44:16,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 10:44:16,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 10:44:16,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 10:44:16,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 10:44:16,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 10:44:16,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 10:44:16,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 10:44:16,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 10:44:16,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 10:44:16,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 10:44:16,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 10:44:16,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 10:44:16,676 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 10:44:16,712 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 10:44:16,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 10:44:16,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 10:44:16,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 10:44:16,718 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 10:44:16,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 10:44:16,718 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 10:44:16,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 10:44:16,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 10:44:16,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 10:44:16,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 10:44:16,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 10:44:16,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 10:44:16,719 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 10:44:16,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 10:44:16,720 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 10:44:16,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 10:44:16,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 10:44:16,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 10:44:16,726 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 10:44:16,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 10:44:16,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 10:44:16,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 10:44:16,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 10:44:16,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 10:44:16,727 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 10:44:16,727 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 10:44:16,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 10:44:16,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 10:44:16,782 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 10:44:16,797 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 10:44:16,802 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 10:44:16,804 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 10:44:16,806 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 10:44:16,807 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_mul_init.i [2019-09-07 10:44:16,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3162321c4/539cb77c7d384a4990db691cf2146e90/FLAG279556ad5 [2019-09-07 10:44:17,284 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 10:44:17,287 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_mul_init.i [2019-09-07 10:44:17,294 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3162321c4/539cb77c7d384a4990db691cf2146e90/FLAG279556ad5 [2019-09-07 10:44:17,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3162321c4/539cb77c7d384a4990db691cf2146e90 [2019-09-07 10:44:17,726 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 10:44:17,728 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 10:44:17,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 10:44:17,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 10:44:17,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 10:44:17,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 10:44:17" (1/1) ... [2019-09-07 10:44:17,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62e9ecad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:44:17, skipping insertion in model container [2019-09-07 10:44:17,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 10:44:17" (1/1) ... [2019-09-07 10:44:17,743 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 10:44:17,758 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 10:44:18,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 10:44:18,008 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 10:44:18,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 10:44:18,052 INFO L192 MainTranslator]: Completed translation [2019-09-07 10:44:18,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:44:18 WrapperNode [2019-09-07 10:44:18,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 10:44:18,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 10:44:18,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 10:44:18,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 10:44:18,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:44:18" (1/1) ... [2019-09-07 10:44:18,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:44:18" (1/1) ... [2019-09-07 10:44:18,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:44:18" (1/1) ... [2019-09-07 10:44:18,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:44:18" (1/1) ... [2019-09-07 10:44:18,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:44:18" (1/1) ... [2019-09-07 10:44:18,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:44:18" (1/1) ... [2019-09-07 10:44:18,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:44:18" (1/1) ... [2019-09-07 10:44:18,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 10:44:18,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 10:44:18,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 10:44:18,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 10:44:18,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:44:18" (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 10:44:18,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 10:44:18,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 10:44:18,256 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 10:44:18,256 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 10:44:18,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 10:44:18,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 10:44:18,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2019-09-07 10:44:18,257 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 10:44:18,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 10:44:18,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 10:44:18,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 10:44:18,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 10:44:18,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 10:44:18,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 10:44:18,553 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 10:44:18,554 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-07 10:44:18,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 10:44:18 BoogieIcfgContainer [2019-09-07 10:44:18,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 10:44:18,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 10:44:18,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 10:44:18,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 10:44:18,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 10:44:17" (1/3) ... [2019-09-07 10:44:18,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@645333ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 10:44:18, skipping insertion in model container [2019-09-07 10:44:18,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:44:18" (2/3) ... [2019-09-07 10:44:18,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@645333ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 10:44:18, skipping insertion in model container [2019-09-07 10:44:18,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 10:44:18" (3/3) ... [2019-09-07 10:44:18,567 INFO L109 eAbstractionObserver]: Analyzing ICFG array_mul_init.i [2019-09-07 10:44:18,577 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 10:44:18,586 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 10:44:18,610 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 10:44:18,641 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 10:44:18,641 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 10:44:18,642 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 10:44:18,642 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 10:44:18,642 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 10:44:18,642 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 10:44:18,642 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 10:44:18,642 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 10:44:18,643 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 10:44:18,659 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-09-07 10:44:18,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-07 10:44:18,665 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:18,666 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:18,668 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:18,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:18,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1583089931, now seen corresponding path program 1 times [2019-09-07 10:44:18,675 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:18,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:18,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:18,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:44:18,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:44:18,809 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 10:44:18,811 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 10:44:18,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 10:44:18,814 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 10:44:18,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 10:44:18,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 10:44:18,832 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-09-07 10:44:18,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:18,856 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2019-09-07 10:44:18,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 10:44:18,858 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-09-07 10:44:18,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:18,867 INFO L225 Difference]: With dead ends: 50 [2019-09-07 10:44:18,867 INFO L226 Difference]: Without dead ends: 24 [2019-09-07 10:44:18,871 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 10:44:18,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-07 10:44:18,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-07 10:44:18,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-07 10:44:18,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-09-07 10:44:18,908 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2019-09-07 10:44:18,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:18,909 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-09-07 10:44:18,909 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 10:44:18,909 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-09-07 10:44:18,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-07 10:44:18,910 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:18,910 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:18,911 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:18,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:18,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1899913894, now seen corresponding path program 1 times [2019-09-07 10:44:18,912 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:18,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:18,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:18,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:44:18,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:44:18,988 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 10:44:18,988 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 10:44:18,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 10:44:18,990 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 10:44:18,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 10:44:18,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 10:44:18,991 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-09-07 10:44:19,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:19,069 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2019-09-07 10:44:19,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 10:44:19,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-09-07 10:44:19,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:19,073 INFO L225 Difference]: With dead ends: 50 [2019-09-07 10:44:19,073 INFO L226 Difference]: Without dead ends: 34 [2019-09-07 10:44:19,074 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 10:44:19,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-07 10:44:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2019-09-07 10:44:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-07 10:44:19,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-09-07 10:44:19,086 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-09-07 10:44:19,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:19,086 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-09-07 10:44:19,086 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 10:44:19,087 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-09-07 10:44:19,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-07 10:44:19,088 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:19,088 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] [2019-09-07 10:44:19,088 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:19,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:19,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1536301701, now seen corresponding path program 1 times [2019-09-07 10:44:19,089 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:19,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:19,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:19,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:44:19,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:44:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-07 10:44:19,188 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 10:44:19,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-07 10:44:19,188 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 10:44:19,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 10:44:19,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-07 10:44:19,189 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2019-09-07 10:44:19,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:19,244 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-09-07 10:44:19,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 10:44:19,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-09-07 10:44:19,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:19,247 INFO L225 Difference]: With dead ends: 34 [2019-09-07 10:44:19,247 INFO L226 Difference]: Without dead ends: 32 [2019-09-07 10:44:19,248 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-07 10:44:19,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-07 10:44:19,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-09-07 10:44:19,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-07 10:44:19,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-09-07 10:44:19,255 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 21 [2019-09-07 10:44:19,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:19,256 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-09-07 10:44:19,256 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 10:44:19,256 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-09-07 10:44:19,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-07 10:44:19,257 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:19,257 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] [2019-09-07 10:44:19,258 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:19,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:19,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1534454659, now seen corresponding path program 1 times [2019-09-07 10:44:19,259 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:19,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:19,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:19,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:44:19,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:19,292 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:19,292 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:19,293 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:19,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:44:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:44:19,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 10:44:19,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 10:44:19,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:19,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-09-07 10:44:19,390 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 10:44:19,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 10:44:19,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 10:44:19,391 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2019-09-07 10:44:19,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:19,495 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2019-09-07 10:44:19,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 10:44:19,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-09-07 10:44:19,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:19,498 INFO L225 Difference]: With dead ends: 73 [2019-09-07 10:44:19,498 INFO L226 Difference]: Without dead ends: 51 [2019-09-07 10:44:19,499 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 10:44:19,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-07 10:44:19,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2019-09-07 10:44:19,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-07 10:44:19,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-09-07 10:44:19,509 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2019-09-07 10:44:19,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:19,510 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-09-07 10:44:19,510 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 10:44:19,510 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-09-07 10:44:19,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-07 10:44:19,511 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:19,511 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:19,512 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:19,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:19,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1606017140, now seen corresponding path program 2 times [2019-09-07 10:44:19,512 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:19,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:19,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:19,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:44:19,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:19,530 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:19,530 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:19,530 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 (exit command is (exit), workingDir is null) [2019-09-07 10:44:19,549 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:19,582 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:44:19,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:44:19,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 10:44:19,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-07 10:44:19,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:19,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-09-07 10:44:19,614 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 10:44:19,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 10:44:19,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 10:44:19,617 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 5 states. [2019-09-07 10:44:19,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:19,764 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2019-09-07 10:44:19,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 10:44:19,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-09-07 10:44:19,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:19,767 INFO L225 Difference]: With dead ends: 87 [2019-09-07 10:44:19,767 INFO L226 Difference]: Without dead ends: 62 [2019-09-07 10:44:19,768 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 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 10:44:19,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-07 10:44:19,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 41. [2019-09-07 10:44:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-07 10:44:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-09-07 10:44:19,778 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 26 [2019-09-07 10:44:19,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:19,778 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-09-07 10:44:19,778 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 10:44:19,779 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-09-07 10:44:19,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-07 10:44:19,780 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:19,780 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:19,780 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:19,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:19,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1732161177, now seen corresponding path program 3 times [2019-09-07 10:44:19,781 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:19,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:19,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:19,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:44:19,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:19,840 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:19,841 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:19,841 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 (exit command is (exit), workingDir is null) [2019-09-07 10:44:19,870 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:19,913 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-07 10:44:19,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:44:19,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 10:44:19,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-07 10:44:19,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:19,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-07 10:44:19,958 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 10:44:19,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 10:44:19,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 10:44:19,959 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 6 states. [2019-09-07 10:44:20,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:20,138 INFO L93 Difference]: Finished difference Result 101 states and 128 transitions. [2019-09-07 10:44:20,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 10:44:20,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-09-07 10:44:20,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:20,140 INFO L225 Difference]: With dead ends: 101 [2019-09-07 10:44:20,140 INFO L226 Difference]: Without dead ends: 73 [2019-09-07 10:44:20,141 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 10:44:20,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-07 10:44:20,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2019-09-07 10:44:20,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-07 10:44:20,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2019-09-07 10:44:20,150 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 31 [2019-09-07 10:44:20,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:20,151 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2019-09-07 10:44:20,151 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 10:44:20,151 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2019-09-07 10:44:20,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-07 10:44:20,152 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:20,152 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:20,152 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:20,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:20,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1392382608, now seen corresponding path program 4 times [2019-09-07 10:44:20,153 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:20,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:20,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:20,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:44:20,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:20,172 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:20,172 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:20,175 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 (exit command is (exit), workingDir is null) [2019-09-07 10:44:20,195 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:20,223 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:44:20,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:44:20,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 10:44:20,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-09-07 10:44:20,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:20,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-07 10:44:20,269 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 10:44:20,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 10:44:20,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 10:44:20,270 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 7 states. [2019-09-07 10:44:20,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:20,461 INFO L93 Difference]: Finished difference Result 115 states and 147 transitions. [2019-09-07 10:44:20,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 10:44:20,461 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-09-07 10:44:20,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:20,463 INFO L225 Difference]: With dead ends: 115 [2019-09-07 10:44:20,463 INFO L226 Difference]: Without dead ends: 84 [2019-09-07 10:44:20,464 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 10:44:20,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-07 10:44:20,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 51. [2019-09-07 10:44:20,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-07 10:44:20,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2019-09-07 10:44:20,473 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 36 [2019-09-07 10:44:20,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:20,474 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2019-09-07 10:44:20,474 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 10:44:20,474 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2019-09-07 10:44:20,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-07 10:44:20,475 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:20,475 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:20,476 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:20,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:20,476 INFO L82 PathProgramCache]: Analyzing trace with hash 267511989, now seen corresponding path program 5 times [2019-09-07 10:44:20,476 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:20,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:20,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:20,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:44:20,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:20,495 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:20,496 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:20,496 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:20,520 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 10:44:20,585 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-07 10:44:20,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:44:20,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 10:44:20,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-07 10:44:20,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:20,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-07 10:44:20,645 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 10:44:20,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 10:44:20,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 10:44:20,646 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 8 states. [2019-09-07 10:44:20,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:20,855 INFO L93 Difference]: Finished difference Result 129 states and 166 transitions. [2019-09-07 10:44:20,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 10:44:20,856 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2019-09-07 10:44:20,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:20,858 INFO L225 Difference]: With dead ends: 129 [2019-09-07 10:44:20,858 INFO L226 Difference]: Without dead ends: 95 [2019-09-07 10:44:20,859 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 10:44:20,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-09-07 10:44:20,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 56. [2019-09-07 10:44:20,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-07 10:44:20,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2019-09-07 10:44:20,870 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 41 [2019-09-07 10:44:20,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:20,870 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2019-09-07 10:44:20,871 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 10:44:20,871 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2019-09-07 10:44:20,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-07 10:44:20,872 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:20,872 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:20,873 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:20,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2052078420, now seen corresponding path program 6 times [2019-09-07 10:44:20,874 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:20,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:20,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:20,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:44:20,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:20,893 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:20,894 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:20,894 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:20,922 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 10:44:20,998 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-07 10:44:20,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:44:21,000 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 10:44:21,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-07 10:44:21,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:21,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-07 10:44:21,075 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 10:44:21,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 10:44:21,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 10:44:21,076 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 9 states. [2019-09-07 10:44:21,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:21,301 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2019-09-07 10:44:21,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 10:44:21,301 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2019-09-07 10:44:21,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:21,303 INFO L225 Difference]: With dead ends: 143 [2019-09-07 10:44:21,303 INFO L226 Difference]: Without dead ends: 106 [2019-09-07 10:44:21,304 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 10:44:21,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-09-07 10:44:21,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 61. [2019-09-07 10:44:21,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-07 10:44:21,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2019-09-07 10:44:21,315 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 46 [2019-09-07 10:44:21,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:21,315 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2019-09-07 10:44:21,316 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 10:44:21,316 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2019-09-07 10:44:21,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-07 10:44:21,317 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:21,317 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:21,318 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:21,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:21,318 INFO L82 PathProgramCache]: Analyzing trace with hash -90078511, now seen corresponding path program 7 times [2019-09-07 10:44:21,318 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:21,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:21,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:21,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:44:21,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:21,337 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:21,337 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:21,337 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:21,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:44:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:44:21,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 10:44:21,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-09-07 10:44:21,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:21,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-07 10:44:21,489 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 10:44:21,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 10:44:21,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 10:44:21,490 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 10 states. [2019-09-07 10:44:21,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:21,760 INFO L93 Difference]: Finished difference Result 157 states and 204 transitions. [2019-09-07 10:44:21,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 10:44:21,761 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2019-09-07 10:44:21,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:21,763 INFO L225 Difference]: With dead ends: 157 [2019-09-07 10:44:21,763 INFO L226 Difference]: Without dead ends: 117 [2019-09-07 10:44:21,765 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 10:44:21,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-09-07 10:44:21,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 66. [2019-09-07 10:44:21,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-07 10:44:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2019-09-07 10:44:21,784 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 51 [2019-09-07 10:44:21,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:21,789 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2019-09-07 10:44:21,789 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 10:44:21,790 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2019-09-07 10:44:21,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-07 10:44:21,791 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:21,792 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:21,792 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:21,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:21,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1181960504, now seen corresponding path program 8 times [2019-09-07 10:44:21,794 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:21,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:21,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:21,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:44:21,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:21,813 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:21,813 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:21,813 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 10:44:21,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:21,868 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:44:21,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:44:21,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 10:44:21,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:44:21,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:21,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-07 10:44:21,974 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 10:44:21,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 10:44:21,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 10:44:21,975 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand 11 states. [2019-09-07 10:44:22,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:22,154 INFO L93 Difference]: Finished difference Result 171 states and 223 transitions. [2019-09-07 10:44:22,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 10:44:22,155 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2019-09-07 10:44:22,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:22,156 INFO L225 Difference]: With dead ends: 171 [2019-09-07 10:44:22,157 INFO L226 Difference]: Without dead ends: 128 [2019-09-07 10:44:22,157 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 10:44:22,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-09-07 10:44:22,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 71. [2019-09-07 10:44:22,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-07 10:44:22,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2019-09-07 10:44:22,167 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 56 [2019-09-07 10:44:22,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:22,168 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2019-09-07 10:44:22,168 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 10:44:22,168 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2019-09-07 10:44:22,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-07 10:44:22,169 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:22,169 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:22,170 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:22,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:22,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1976253677, now seen corresponding path program 9 times [2019-09-07 10:44:22,170 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:22,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:22,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:22,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:44:22,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:22,188 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:22,188 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:22,189 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:22,209 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:44:22,365 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-07 10:44:22,366 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:44:22,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 10:44:22,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-09-07 10:44:22,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:22,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-07 10:44:22,483 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 10:44:22,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 10:44:22,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 10:44:22,483 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2019-09-07 10:44:22,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:22,748 INFO L93 Difference]: Finished difference Result 185 states and 242 transitions. [2019-09-07 10:44:22,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 10:44:22,748 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2019-09-07 10:44:22,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:22,750 INFO L225 Difference]: With dead ends: 185 [2019-09-07 10:44:22,750 INFO L226 Difference]: Without dead ends: 139 [2019-09-07 10:44:22,751 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 10:44:22,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-09-07 10:44:22,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 76. [2019-09-07 10:44:22,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-07 10:44:22,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2019-09-07 10:44:22,760 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 61 [2019-09-07 10:44:22,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:22,761 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2019-09-07 10:44:22,761 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 10:44:22,761 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2019-09-07 10:44:22,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-09-07 10:44:22,762 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:22,762 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:22,762 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:22,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:22,763 INFO L82 PathProgramCache]: Analyzing trace with hash 254629660, now seen corresponding path program 10 times [2019-09-07 10:44:22,763 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:22,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:22,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:22,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:44:22,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:22,783 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:22,783 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:22,784 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:22,804 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:44:22,835 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:44:22,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:44:22,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 10:44:22,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:44:22,941 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:22,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-07 10:44:22,942 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 10:44:22,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 10:44:22,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 10:44:22,942 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand 13 states. [2019-09-07 10:44:23,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:23,237 INFO L93 Difference]: Finished difference Result 199 states and 261 transitions. [2019-09-07 10:44:23,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 10:44:23,237 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2019-09-07 10:44:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:23,239 INFO L225 Difference]: With dead ends: 199 [2019-09-07 10:44:23,239 INFO L226 Difference]: Without dead ends: 150 [2019-09-07 10:44:23,240 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 10:44:23,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-09-07 10:44:23,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 81. [2019-09-07 10:44:23,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-07 10:44:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2019-09-07 10:44:23,255 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 66 [2019-09-07 10:44:23,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:23,256 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2019-09-07 10:44:23,256 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 10:44:23,256 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2019-09-07 10:44:23,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-07 10:44:23,257 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:23,257 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:23,258 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:23,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:23,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1584191241, now seen corresponding path program 11 times [2019-09-07 10:44:23,258 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:23,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:23,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:23,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:44:23,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:23,278 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:23,278 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:23,278 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:23,298 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 10:44:23,745 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-07 10:44:23,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:44:23,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 10:44:23,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-09-07 10:44:23,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:23,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-07 10:44:23,876 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 10:44:23,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 10:44:23,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 10:44:23,877 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 14 states. [2019-09-07 10:44:24,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:24,171 INFO L93 Difference]: Finished difference Result 213 states and 280 transitions. [2019-09-07 10:44:24,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 10:44:24,172 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2019-09-07 10:44:24,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:24,173 INFO L225 Difference]: With dead ends: 213 [2019-09-07 10:44:24,174 INFO L226 Difference]: Without dead ends: 161 [2019-09-07 10:44:24,174 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 10:44:24,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-09-07 10:44:24,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 86. [2019-09-07 10:44:24,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-07 10:44:24,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2019-09-07 10:44:24,183 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 71 [2019-09-07 10:44:24,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:24,184 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2019-09-07 10:44:24,184 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 10:44:24,184 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2019-09-07 10:44:24,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-07 10:44:24,185 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:24,185 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:24,185 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:24,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:24,186 INFO L82 PathProgramCache]: Analyzing trace with hash -171924224, now seen corresponding path program 12 times [2019-09-07 10:44:24,186 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:24,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:24,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:24,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:44:24,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:24,205 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:24,205 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:24,221 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:24,257 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 10:44:24,822 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-07 10:44:24,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:44:24,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 10:44:24,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:24,926 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-09-07 10:44:24,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:24,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-07 10:44:24,931 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 10:44:24,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 10:44:24,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 10:44:24,932 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand 15 states. [2019-09-07 10:44:25,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:25,287 INFO L93 Difference]: Finished difference Result 227 states and 299 transitions. [2019-09-07 10:44:25,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 10:44:25,288 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 76 [2019-09-07 10:44:25,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:25,291 INFO L225 Difference]: With dead ends: 227 [2019-09-07 10:44:25,291 INFO L226 Difference]: Without dead ends: 172 [2019-09-07 10:44:25,292 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 10:44:25,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-09-07 10:44:25,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 91. [2019-09-07 10:44:25,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-09-07 10:44:25,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2019-09-07 10:44:25,309 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 76 [2019-09-07 10:44:25,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:25,310 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2019-09-07 10:44:25,310 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 10:44:25,310 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2019-09-07 10:44:25,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-07 10:44:25,313 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:25,314 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:25,314 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:25,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:25,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1140584155, now seen corresponding path program 13 times [2019-09-07 10:44:25,314 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:25,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:25,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:25,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:44:25,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:25,349 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:25,349 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:25,349 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 (exit command is (exit), workingDir is null) [2019-09-07 10:44:25,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:44:25,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 10:44:25,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-09-07 10:44:25,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:25,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-07 10:44:25,580 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 10:44:25,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 10:44:25,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 10:44:25,581 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 16 states. [2019-09-07 10:44:25,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:25,896 INFO L93 Difference]: Finished difference Result 241 states and 318 transitions. [2019-09-07 10:44:25,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 10:44:25,897 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2019-09-07 10:44:25,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:25,899 INFO L225 Difference]: With dead ends: 241 [2019-09-07 10:44:25,899 INFO L226 Difference]: Without dead ends: 183 [2019-09-07 10:44:25,900 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 10:44:25,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-09-07 10:44:25,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 96. [2019-09-07 10:44:25,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-07 10:44:25,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2019-09-07 10:44:25,910 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 81 [2019-09-07 10:44:25,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:25,910 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2019-09-07 10:44:25,910 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 10:44:25,910 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2019-09-07 10:44:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-07 10:44:25,911 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:25,912 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:25,912 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:25,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:25,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1561365788, now seen corresponding path program 14 times [2019-09-07 10:44:25,913 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:25,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:25,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:25,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:44:25,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:25,931 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:25,931 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:25,932 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:25,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:44:25,989 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:44:25,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:44:25,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 10:44:25,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:44:26,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:26,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-07 10:44:26,175 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 10:44:26,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 10:44:26,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 10:44:26,176 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand 17 states. [2019-09-07 10:44:26,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:26,542 INFO L93 Difference]: Finished difference Result 255 states and 337 transitions. [2019-09-07 10:44:26,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 10:44:26,542 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 86 [2019-09-07 10:44:26,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:26,544 INFO L225 Difference]: With dead ends: 255 [2019-09-07 10:44:26,544 INFO L226 Difference]: Without dead ends: 194 [2019-09-07 10:44:26,545 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 10:44:26,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-09-07 10:44:26,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 101. [2019-09-07 10:44:26,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-07 10:44:26,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2019-09-07 10:44:26,554 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 86 [2019-09-07 10:44:26,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:26,555 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2019-09-07 10:44:26,555 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 10:44:26,555 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2019-09-07 10:44:26,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-07 10:44:26,556 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:26,556 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:26,556 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:26,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:26,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1552853825, now seen corresponding path program 15 times [2019-09-07 10:44:26,557 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:26,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:26,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:26,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:44:26,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:26,571 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:26,572 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:26,572 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:26,593 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:44:27,799 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-07 10:44:27,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:44:27,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 10:44:27,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-09-07 10:44:27,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:27,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-07 10:44:27,969 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-07 10:44:27,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-07 10:44:27,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 10:44:27,970 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand 18 states. [2019-09-07 10:44:28,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:28,394 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2019-09-07 10:44:28,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 10:44:28,395 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2019-09-07 10:44:28,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:28,396 INFO L225 Difference]: With dead ends: 269 [2019-09-07 10:44:28,397 INFO L226 Difference]: Without dead ends: 205 [2019-09-07 10:44:28,397 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 10:44:28,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-09-07 10:44:28,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 106. [2019-09-07 10:44:28,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-07 10:44:28,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2019-09-07 10:44:28,406 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 91 [2019-09-07 10:44:28,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:28,406 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2019-09-07 10:44:28,406 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-07 10:44:28,406 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2019-09-07 10:44:28,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-07 10:44:28,407 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:28,408 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:28,408 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:28,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:28,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1426325304, now seen corresponding path program 16 times [2019-09-07 10:44:28,408 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:28,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:28,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:28,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:44:28,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:28,423 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:28,423 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:28,423 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:28,452 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:44:28,491 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:44:28,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:44:28,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 10:44:28,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-09-07 10:44:28,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:28,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-07 10:44:28,657 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 10:44:28,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 10:44:28,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 10:44:28,658 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand 19 states. [2019-09-07 10:44:29,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:29,063 INFO L93 Difference]: Finished difference Result 283 states and 375 transitions. [2019-09-07 10:44:29,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 10:44:29,063 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 96 [2019-09-07 10:44:29,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:29,065 INFO L225 Difference]: With dead ends: 283 [2019-09-07 10:44:29,065 INFO L226 Difference]: Without dead ends: 216 [2019-09-07 10:44:29,066 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 10:44:29,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-09-07 10:44:29,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 111. [2019-09-07 10:44:29,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-09-07 10:44:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2019-09-07 10:44:29,075 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 96 [2019-09-07 10:44:29,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:29,075 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2019-09-07 10:44:29,075 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 10:44:29,076 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2019-09-07 10:44:29,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-07 10:44:29,077 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:29,077 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:29,077 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:29,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:29,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1888118109, now seen corresponding path program 17 times [2019-09-07 10:44:29,078 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:29,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:29,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:29,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:44:29,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:29,092 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:29,092 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:29,092 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 (exit command is (exit), workingDir is null) [2019-09-07 10:44:29,120 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:31,063 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-07 10:44:31,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:44:31,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 10:44:31,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-09-07 10:44:31,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:31,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-07 10:44:31,254 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 10:44:31,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 10:44:31,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:44:31,255 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand 20 states. [2019-09-07 10:44:31,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:31,667 INFO L93 Difference]: Finished difference Result 297 states and 394 transitions. [2019-09-07 10:44:31,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 10:44:31,667 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2019-09-07 10:44:31,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:31,669 INFO L225 Difference]: With dead ends: 297 [2019-09-07 10:44:31,669 INFO L226 Difference]: Without dead ends: 227 [2019-09-07 10:44:31,670 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:44:31,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-09-07 10:44:31,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 116. [2019-09-07 10:44:31,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-09-07 10:44:31,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2019-09-07 10:44:31,679 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 101 [2019-09-07 10:44:31,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:31,679 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2019-09-07 10:44:31,679 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 10:44:31,680 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2019-09-07 10:44:31,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-07 10:44:31,681 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:31,681 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:31,681 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:31,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:31,681 INFO L82 PathProgramCache]: Analyzing trace with hash -240611668, now seen corresponding path program 18 times [2019-09-07 10:44:31,682 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:31,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:31,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:31,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:44:31,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:31,696 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:31,696 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:31,696 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 (exit command is (exit), workingDir is null) [2019-09-07 10:44:31,718 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:34,201 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-07 10:44:34,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:44:34,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 10:44:34,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-09-07 10:44:34,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:34,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-07 10:44:34,417 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 10:44:34,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 10:44:34,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 10:44:34,418 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand 21 states. [2019-09-07 10:44:34,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:34,978 INFO L93 Difference]: Finished difference Result 311 states and 413 transitions. [2019-09-07 10:44:34,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 10:44:34,981 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 106 [2019-09-07 10:44:34,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:34,983 INFO L225 Difference]: With dead ends: 311 [2019-09-07 10:44:34,984 INFO L226 Difference]: Without dead ends: 238 [2019-09-07 10:44:34,985 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 10:44:34,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-09-07 10:44:34,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 121. [2019-09-07 10:44:34,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-09-07 10:44:34,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2019-09-07 10:44:34,996 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 106 [2019-09-07 10:44:34,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:34,997 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2019-09-07 10:44:34,997 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 10:44:34,997 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2019-09-07 10:44:34,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-09-07 10:44:34,999 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:34,999 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:35,000 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:35,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:35,000 INFO L82 PathProgramCache]: Analyzing trace with hash 653590393, now seen corresponding path program 19 times [2019-09-07 10:44:35,000 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:35,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:35,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:35,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:44:35,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:35,026 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:35,026 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:35,026 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:35,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:44:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:44:35,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 10:44:35,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-09-07 10:44:35,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:35,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-07 10:44:35,413 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 10:44:35,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 10:44:35,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 10:44:35,414 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand 22 states. [2019-09-07 10:44:35,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:35,852 INFO L93 Difference]: Finished difference Result 325 states and 432 transitions. [2019-09-07 10:44:35,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 10:44:35,853 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 111 [2019-09-07 10:44:35,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:35,855 INFO L225 Difference]: With dead ends: 325 [2019-09-07 10:44:35,855 INFO L226 Difference]: Without dead ends: 249 [2019-09-07 10:44:35,857 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 10:44:35,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-09-07 10:44:35,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 126. [2019-09-07 10:44:35,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-09-07 10:44:35,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2019-09-07 10:44:35,870 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 111 [2019-09-07 10:44:35,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:35,871 INFO L475 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2019-09-07 10:44:35,871 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 10:44:35,871 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2019-09-07 10:44:35,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-09-07 10:44:35,872 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:35,872 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:35,873 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:35,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:35,873 INFO L82 PathProgramCache]: Analyzing trace with hash 238509200, now seen corresponding path program 20 times [2019-09-07 10:44:35,873 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:35,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:35,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:35,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:44:35,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:35,889 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:35,889 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:35,889 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 (exit command is (exit), workingDir is null) [2019-09-07 10:44:35,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:35,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:44:35,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:44:35,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 10:44:35,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-09-07 10:44:36,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:36,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-07 10:44:36,210 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 10:44:36,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 10:44:36,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:44:36,211 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand 23 states. [2019-09-07 10:44:36,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:36,779 INFO L93 Difference]: Finished difference Result 339 states and 451 transitions. [2019-09-07 10:44:36,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 10:44:36,779 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 116 [2019-09-07 10:44:36,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:36,781 INFO L225 Difference]: With dead ends: 339 [2019-09-07 10:44:36,781 INFO L226 Difference]: Without dead ends: 260 [2019-09-07 10:44:36,782 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:44:36,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-09-07 10:44:36,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 131. [2019-09-07 10:44:36,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-09-07 10:44:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 155 transitions. [2019-09-07 10:44:36,794 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 155 transitions. Word has length 116 [2019-09-07 10:44:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:36,794 INFO L475 AbstractCegarLoop]: Abstraction has 131 states and 155 transitions. [2019-09-07 10:44:36,794 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 10:44:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 155 transitions. [2019-09-07 10:44:36,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-07 10:44:36,795 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:36,796 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:36,796 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:36,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:36,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1229732245, now seen corresponding path program 21 times [2019-09-07 10:44:36,796 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:36,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:36,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:36,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:44:36,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:36,811 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:36,811 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:36,811 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 (exit command is (exit), workingDir is null) [2019-09-07 10:44:36,829 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:40,855 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-07 10:44:40,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:44:40,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 10:44:40,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-09-07 10:44:41,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:41,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-07 10:44:41,154 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 10:44:41,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 10:44:41,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 10:44:41,155 INFO L87 Difference]: Start difference. First operand 131 states and 155 transitions. Second operand 24 states. [2019-09-07 10:44:41,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:41,787 INFO L93 Difference]: Finished difference Result 353 states and 470 transitions. [2019-09-07 10:44:41,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-07 10:44:41,788 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2019-09-07 10:44:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:41,792 INFO L225 Difference]: With dead ends: 353 [2019-09-07 10:44:41,792 INFO L226 Difference]: Without dead ends: 271 [2019-09-07 10:44:41,795 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 10:44:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-09-07 10:44:41,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 136. [2019-09-07 10:44:41,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-09-07 10:44:41,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 161 transitions. [2019-09-07 10:44:41,810 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 161 transitions. Word has length 121 [2019-09-07 10:44:41,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:41,823 INFO L475 AbstractCegarLoop]: Abstraction has 136 states and 161 transitions. [2019-09-07 10:44:41,823 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 10:44:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 161 transitions. [2019-09-07 10:44:41,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-09-07 10:44:41,825 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:41,826 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:41,827 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:41,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:41,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1351964044, now seen corresponding path program 22 times [2019-09-07 10:44:41,827 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:41,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:41,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:41,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:44:41,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:41,849 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:41,850 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:41,850 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 (exit command is (exit), workingDir is null) [2019-09-07 10:44:41,878 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 [2019-09-07 10:44:41,932 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:44:41,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:44:41,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 10:44:41,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:44:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-09-07 10:44:42,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:44:42,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-07 10:44:42,208 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 10:44:42,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 10:44:42,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 10:44:42,209 INFO L87 Difference]: Start difference. First operand 136 states and 161 transitions. Second operand 25 states. [2019-09-07 10:44:42,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:44:42,777 INFO L93 Difference]: Finished difference Result 367 states and 489 transitions. [2019-09-07 10:44:42,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 10:44:42,778 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-09-07 10:44:42,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:44:42,780 INFO L225 Difference]: With dead ends: 367 [2019-09-07 10:44:42,780 INFO L226 Difference]: Without dead ends: 282 [2019-09-07 10:44:42,781 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 10:44:42,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-09-07 10:44:42,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 141. [2019-09-07 10:44:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-09-07 10:44:42,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 167 transitions. [2019-09-07 10:44:42,793 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 167 transitions. Word has length 126 [2019-09-07 10:44:42,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:44:42,794 INFO L475 AbstractCegarLoop]: Abstraction has 141 states and 167 transitions. [2019-09-07 10:44:42,794 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 10:44:42,794 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 167 transitions. [2019-09-07 10:44:42,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-09-07 10:44:42,795 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:44:42,795 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:44:42,796 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:44:42,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:44:42,796 INFO L82 PathProgramCache]: Analyzing trace with hash -678571087, now seen corresponding path program 23 times [2019-09-07 10:44:42,796 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:44:42,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:44:42,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:42,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:44:42,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:44:42,812 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:44:42,812 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:44:42,813 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:44:42,826 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 10:45:33,375 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-09-07 10:45:33,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:45:33,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 10:45:33,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:45:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2019-09-07 10:45:33,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:45:33,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-09-07 10:45:33,689 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 10:45:33,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 10:45:33,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 10:45:33,690 INFO L87 Difference]: Start difference. First operand 141 states and 167 transitions. Second operand 26 states. [2019-09-07 10:45:34,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:45:34,392 INFO L93 Difference]: Finished difference Result 381 states and 508 transitions. [2019-09-07 10:45:34,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 10:45:34,392 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 131 [2019-09-07 10:45:34,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:45:34,394 INFO L225 Difference]: With dead ends: 381 [2019-09-07 10:45:34,394 INFO L226 Difference]: Without dead ends: 293 [2019-09-07 10:45:34,395 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 10:45:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2019-09-07 10:45:34,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 146. [2019-09-07 10:45:34,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-09-07 10:45:34,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 173 transitions. [2019-09-07 10:45:34,409 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 173 transitions. Word has length 131 [2019-09-07 10:45:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:45:34,409 INFO L475 AbstractCegarLoop]: Abstraction has 146 states and 173 transitions. [2019-09-07 10:45:34,409 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 10:45:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 173 transitions. [2019-09-07 10:45:34,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-07 10:45:34,411 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:45:34,411 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:45:34,411 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:45:34,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:45:34,412 INFO L82 PathProgramCache]: Analyzing trace with hash -8079272, now seen corresponding path program 24 times [2019-09-07 10:45:34,412 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:45:34,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:45:34,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:45:34,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:45:34,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:45:34,430 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:45:34,430 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:45:34,430 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 (exit command is (exit), workingDir is null) [2019-09-07 10:45:34,449 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:48:06,877 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-07 10:48:06,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:48:06,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 10:48:06,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:48:07,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2019-09-07 10:48:07,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:48:07,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-09-07 10:48:07,261 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 10:48:07,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 10:48:07,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 10:48:07,262 INFO L87 Difference]: Start difference. First operand 146 states and 173 transitions. Second operand 27 states. [2019-09-07 10:48:07,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:48:07,916 INFO L93 Difference]: Finished difference Result 395 states and 527 transitions. [2019-09-07 10:48:07,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-07 10:48:07,916 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 136 [2019-09-07 10:48:07,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:48:07,918 INFO L225 Difference]: With dead ends: 395 [2019-09-07 10:48:07,918 INFO L226 Difference]: Without dead ends: 304 [2019-09-07 10:48:07,919 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 10:48:07,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2019-09-07 10:48:07,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 151. [2019-09-07 10:48:07,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-09-07 10:48:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 179 transitions. [2019-09-07 10:48:07,933 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 179 transitions. Word has length 136 [2019-09-07 10:48:07,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:48:07,934 INFO L475 AbstractCegarLoop]: Abstraction has 151 states and 179 transitions. [2019-09-07 10:48:07,934 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 10:48:07,934 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 179 transitions. [2019-09-07 10:48:07,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-07 10:48:07,935 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:48:07,935 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:48:07,936 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:48:07,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:48:07,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1539863091, now seen corresponding path program 25 times [2019-09-07 10:48:07,936 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:48:07,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:48:07,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:07,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:48:07,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:07,953 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:48:07,953 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:48:07,954 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:48:07,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:48:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:48:08,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 10:48:08,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:48:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-09-07 10:48:08,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:48:08,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-09-07 10:48:08,361 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 10:48:08,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 10:48:08,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 10:48:08,363 INFO L87 Difference]: Start difference. First operand 151 states and 179 transitions. Second operand 28 states. [2019-09-07 10:48:09,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:48:09,091 INFO L93 Difference]: Finished difference Result 409 states and 546 transitions. [2019-09-07 10:48:09,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 10:48:09,092 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 141 [2019-09-07 10:48:09,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:48:09,094 INFO L225 Difference]: With dead ends: 409 [2019-09-07 10:48:09,096 INFO L226 Difference]: Without dead ends: 315 [2019-09-07 10:48:09,097 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 10:48:09,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2019-09-07 10:48:09,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 156. [2019-09-07 10:48:09,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-09-07 10:48:09,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 185 transitions. [2019-09-07 10:48:09,115 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 185 transitions. Word has length 141 [2019-09-07 10:48:09,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:48:09,115 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 185 transitions. [2019-09-07 10:48:09,115 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 10:48:09,115 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 185 transitions. [2019-09-07 10:48:09,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-09-07 10:48:09,116 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:48:09,116 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:48:09,117 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:48:09,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:48:09,117 INFO L82 PathProgramCache]: Analyzing trace with hash 138921532, now seen corresponding path program 26 times [2019-09-07 10:48:09,117 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:48:09,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:48:09,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:09,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:48:09,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:09,135 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:48:09,135 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:48:09,135 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 (exit command is (exit), workingDir is null) [2019-09-07 10:48:09,150 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:48:09,210 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:48:09,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:48:09,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 10:48:09,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:48:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2019-09-07 10:48:09,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:48:09,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-09-07 10:48:09,755 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-07 10:48:09,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-07 10:48:09,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 10:48:09,756 INFO L87 Difference]: Start difference. First operand 156 states and 185 transitions. Second operand 29 states. [2019-09-07 10:48:10,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:48:10,495 INFO L93 Difference]: Finished difference Result 423 states and 565 transitions. [2019-09-07 10:48:10,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-07 10:48:10,495 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 146 [2019-09-07 10:48:10,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:48:10,497 INFO L225 Difference]: With dead ends: 423 [2019-09-07 10:48:10,497 INFO L226 Difference]: Without dead ends: 326 [2019-09-07 10:48:10,498 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 10:48:10,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-09-07 10:48:10,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 161. [2019-09-07 10:48:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-09-07 10:48:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 191 transitions. [2019-09-07 10:48:10,516 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 191 transitions. Word has length 146 [2019-09-07 10:48:10,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:48:10,516 INFO L475 AbstractCegarLoop]: Abstraction has 161 states and 191 transitions. [2019-09-07 10:48:10,516 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-07 10:48:10,516 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 191 transitions. [2019-09-07 10:48:10,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-09-07 10:48:10,517 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:48:10,517 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:48:10,518 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:48:10,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:48:10,518 INFO L82 PathProgramCache]: Analyzing trace with hash -263772183, now seen corresponding path program 27 times [2019-09-07 10:48:10,518 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:48:10,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:48:10,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:10,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:48:10,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:10,536 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:48:10,537 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:48:10,537 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 (exit command is (exit), workingDir is null) [2019-09-07 10:48:10,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:48:25,100 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-09-07 10:48:25,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:48:25,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 10:48:25,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:48:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2019-09-07 10:48:25,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:48:25,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-09-07 10:48:25,785 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 10:48:25,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 10:48:25,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 10:48:25,786 INFO L87 Difference]: Start difference. First operand 161 states and 191 transitions. Second operand 30 states. [2019-09-07 10:48:26,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:48:26,767 INFO L93 Difference]: Finished difference Result 437 states and 584 transitions. [2019-09-07 10:48:26,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-07 10:48:26,768 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 151 [2019-09-07 10:48:26,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:48:26,771 INFO L225 Difference]: With dead ends: 437 [2019-09-07 10:48:26,771 INFO L226 Difference]: Without dead ends: 337 [2019-09-07 10:48:26,772 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 10:48:26,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-09-07 10:48:26,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 166. [2019-09-07 10:48:26,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-09-07 10:48:26,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 197 transitions. [2019-09-07 10:48:26,791 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 197 transitions. Word has length 151 [2019-09-07 10:48:26,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:48:26,792 INFO L475 AbstractCegarLoop]: Abstraction has 166 states and 197 transitions. [2019-09-07 10:48:26,792 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 10:48:26,792 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 197 transitions. [2019-09-07 10:48:26,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-09-07 10:48:26,793 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:48:26,793 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:48:26,793 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:48:26,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:48:26,794 INFO L82 PathProgramCache]: Analyzing trace with hash 385225760, now seen corresponding path program 28 times [2019-09-07 10:48:26,794 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:48:26,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:48:26,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:26,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:48:26,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:26,813 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:48:26,814 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:48:26,814 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 (exit command is (exit), workingDir is null) [2019-09-07 10:48:26,835 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:48:26,905 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:48:26,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:48:26,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 10:48:26,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:48:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2019-09-07 10:48:27,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:48:27,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-09-07 10:48:27,376 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 10:48:27,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 10:48:27,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-09-07 10:48:27,377 INFO L87 Difference]: Start difference. First operand 166 states and 197 transitions. Second operand 31 states. [2019-09-07 10:48:28,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:48:28,144 INFO L93 Difference]: Finished difference Result 451 states and 603 transitions. [2019-09-07 10:48:28,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 10:48:28,144 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 156 [2019-09-07 10:48:28,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:48:28,147 INFO L225 Difference]: With dead ends: 451 [2019-09-07 10:48:28,147 INFO L226 Difference]: Without dead ends: 348 [2019-09-07 10:48:28,148 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-09-07 10:48:28,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2019-09-07 10:48:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 171. [2019-09-07 10:48:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-09-07 10:48:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 203 transitions. [2019-09-07 10:48:28,166 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 203 transitions. Word has length 156 [2019-09-07 10:48:28,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:48:28,166 INFO L475 AbstractCegarLoop]: Abstraction has 171 states and 203 transitions. [2019-09-07 10:48:28,166 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 10:48:28,166 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 203 transitions. [2019-09-07 10:48:28,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-09-07 10:48:28,167 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:48:28,168 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:48:28,168 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:48:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:48:28,168 INFO L82 PathProgramCache]: Analyzing trace with hash 121266693, now seen corresponding path program 29 times [2019-09-07 10:48:28,168 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:48:28,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:48:28,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:28,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:48:28,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:28,186 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:48:28,186 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:48:28,187 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:48:28,202 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 10:53:37,023 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-09-07 10:53:37,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:53:37,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-07 10:53:37,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:53:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-09-07 10:53:37,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:53:37,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-09-07 10:53:37,503 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-07 10:53:37,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-07 10:53:37,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:53:37,504 INFO L87 Difference]: Start difference. First operand 171 states and 203 transitions. Second operand 32 states. [2019-09-07 10:53:38,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:53:38,415 INFO L93 Difference]: Finished difference Result 465 states and 622 transitions. [2019-09-07 10:53:38,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-07 10:53:38,416 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 161 [2019-09-07 10:53:38,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:53:38,417 INFO L225 Difference]: With dead ends: 465 [2019-09-07 10:53:38,417 INFO L226 Difference]: Without dead ends: 359 [2019-09-07 10:53:38,432 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:53:38,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2019-09-07 10:53:38,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 176. [2019-09-07 10:53:38,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-09-07 10:53:38,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 209 transitions. [2019-09-07 10:53:38,455 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 209 transitions. Word has length 161 [2019-09-07 10:53:38,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:53:38,455 INFO L475 AbstractCegarLoop]: Abstraction has 176 states and 209 transitions. [2019-09-07 10:53:38,456 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-07 10:53:38,456 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 209 transitions. [2019-09-07 10:53:38,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-09-07 10:53:38,457 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:53:38,457 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:53:38,457 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:53:38,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:53:38,457 INFO L82 PathProgramCache]: Analyzing trace with hash 542237188, now seen corresponding path program 30 times [2019-09-07 10:53:38,458 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:53:38,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:53:38,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:53:38,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:53:38,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:53:38,478 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:53:38,479 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:53:38,479 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 (exit command is (exit), workingDir is null) [2019-09-07 10:53:38,493 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true