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 0.1.24-673a906-m [2019-10-01 23:54:38,605 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-01 23:54:38,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-01 23:54:38,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-01 23:54:38,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-01 23:54:38,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-01 23:54:38,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-01 23:54:38,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-01 23:54:38,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-01 23:54:38,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-01 23:54:38,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-01 23:54:38,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-01 23:54:38,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-01 23:54:38,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-01 23:54:38,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-01 23:54:38,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-01 23:54:38,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-01 23:54:38,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-01 23:54:38,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-01 23:54:38,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-01 23:54:38,661 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 [2019-10-01 23:54:38,677 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-01 23:54:38,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-01 23:54:38,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-01 23:54:38,679 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-01 23:54:38,679 INFO L138 SettingsManager]: * Use SBE=true [2019-10-01 23:54:38,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-01 23:54:38,679 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-01 23:54:38,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-01 23:54:38,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-01 23:54:38,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-01 23:54:38,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-01 23:54:38,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-01 23:54:38,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-01 23:54:38,681 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-01 23:54:38,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-01 23:54:38,681 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-01 23:54:38,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-01 23:54:38,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-01 23:54:38,682 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-01 23:54:38,682 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-01 23:54:38,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-01 23:54:38,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-01 23:54:38,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-01 23:54:38,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-01 23:54:38,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-01 23:54:38,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-01 23:54:38,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-01 23:54:38,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-01 23:54:38,684 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-01 23:54:38,711 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-01 23:54:38,724 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-01 23:54:38,728 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-01 23:54:38,729 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-01 23:54:38,729 INFO L275 PluginConnector]: CDTParser initialized [2019-10-01 23:54:38,730 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_mul_init.i [2019-10-01 23:54:38,805 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c4494f9c/5f071fe874ac416b81c8111bdeac59e4/FLAGd00f3b7c2 [2019-10-01 23:54:39,248 INFO L306 CDTParser]: Found 1 translation units. [2019-10-01 23:54:39,249 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_mul_init.i [2019-10-01 23:54:39,253 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c4494f9c/5f071fe874ac416b81c8111bdeac59e4/FLAGd00f3b7c2 [2019-10-01 23:54:39,626 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c4494f9c/5f071fe874ac416b81c8111bdeac59e4 [2019-10-01 23:54:39,636 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-01 23:54:39,638 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-01 23:54:39,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-01 23:54:39,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-01 23:54:39,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-01 23:54:39,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 11:54:39" (1/1) ... [2019-10-01 23:54:39,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fba2a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:54:39, skipping insertion in model container [2019-10-01 23:54:39,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 11:54:39" (1/1) ... [2019-10-01 23:54:39,654 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-01 23:54:39,671 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-01 23:54:39,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 23:54:39,873 INFO L188 MainTranslator]: Completed pre-run [2019-10-01 23:54:39,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 23:54:39,912 INFO L192 MainTranslator]: Completed translation [2019-10-01 23:54:39,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:54:39 WrapperNode [2019-10-01 23:54:39,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-01 23:54:39,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-01 23:54:39,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-01 23:54:39,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-01 23:54:40,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:54:39" (1/1) ... [2019-10-01 23:54:40,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:54:39" (1/1) ... [2019-10-01 23:54:40,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:54:39" (1/1) ... [2019-10-01 23:54:40,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:54:39" (1/1) ... [2019-10-01 23:54:40,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:54:39" (1/1) ... [2019-10-01 23:54:40,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:54:39" (1/1) ... [2019-10-01 23:54:40,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:54:39" (1/1) ... [2019-10-01 23:54:40,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-01 23:54:40,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-01 23:54:40,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-01 23:54:40,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-01 23:54:40,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:54:39" (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 [2019-10-01 23:54:40,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-01 23:54:40,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-01 23:54:40,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-01 23:54:40,099 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-01 23:54:40,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-01 23:54:40,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-01 23:54:40,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2019-10-01 23:54:40,099 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-01 23:54:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-01 23:54:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-01 23:54:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-01 23:54:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-01 23:54:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-01 23:54:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-01 23:54:40,359 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-01 23:54:40,360 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-01 23:54:40,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 11:54:40 BoogieIcfgContainer [2019-10-01 23:54:40,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-01 23:54:40,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-01 23:54:40,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-01 23:54:40,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-01 23:54:40,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.10 11:54:39" (1/3) ... [2019-10-01 23:54:40,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dcdc960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 11:54:40, skipping insertion in model container [2019-10-01 23:54:40,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:54:39" (2/3) ... [2019-10-01 23:54:40,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dcdc960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 11:54:40, skipping insertion in model container [2019-10-01 23:54:40,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 11:54:40" (3/3) ... [2019-10-01 23:54:40,379 INFO L109 eAbstractionObserver]: Analyzing ICFG array_mul_init.i [2019-10-01 23:54:40,409 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-01 23:54:40,420 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-01 23:54:40,456 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-01 23:54:40,487 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-01 23:54:40,488 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-01 23:54:40,488 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-01 23:54:40,488 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-01 23:54:40,488 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-01 23:54:40,488 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-01 23:54:40,488 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-01 23:54:40,488 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-01 23:54:40,488 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-01 23:54:40,503 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-01 23:54:40,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-01 23:54:40,508 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:40,509 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:40,510 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:40,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:40,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1583089931, now seen corresponding path program 1 times [2019-10-01 23:54:40,517 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:40,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:40,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:40,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:54:40,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:54:40,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 23:54:40,643 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:54:40,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-01 23:54:40,646 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-01 23:54:40,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-01 23:54:40,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-01 23:54:40,659 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-10-01 23:54:40,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:40,683 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2019-10-01 23:54:40,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-01 23:54:40,684 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-10-01 23:54:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:40,692 INFO L225 Difference]: With dead ends: 50 [2019-10-01 23:54:40,692 INFO L226 Difference]: Without dead ends: 24 [2019-10-01 23:54:40,695 INFO L640 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 [2019-10-01 23:54:40,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-01 23:54:40,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-01 23:54:40,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-01 23:54:40,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-10-01 23:54:40,735 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2019-10-01 23:54:40,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:40,735 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-10-01 23:54:40,735 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-01 23:54:40,736 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-10-01 23:54:40,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-01 23:54:40,736 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:40,737 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:40,737 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:40,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:40,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1899913894, now seen corresponding path program 1 times [2019-10-01 23:54:40,738 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:40,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:40,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:40,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:54:40,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:54:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 23:54:40,793 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:54:40,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-01 23:54:40,797 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-01 23:54:40,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-01 23:54:40,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 23:54:40,799 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-10-01 23:54:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:40,916 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2019-10-01 23:54:40,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-01 23:54:40,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-01 23:54:40,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:40,921 INFO L225 Difference]: With dead ends: 50 [2019-10-01 23:54:40,922 INFO L226 Difference]: Without dead ends: 34 [2019-10-01 23:54:40,923 INFO L640 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 [2019-10-01 23:54:40,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-01 23:54:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2019-10-01 23:54:40,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-01 23:54:40,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-01 23:54:40,939 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-10-01 23:54:40,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:40,940 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-01 23:54:40,940 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-01 23:54:40,940 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-01 23:54:40,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-01 23:54:40,941 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:40,942 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:40,942 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:40,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:40,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1536301701, now seen corresponding path program 1 times [2019-10-01 23:54:40,942 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:40,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:40,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:40,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:54:40,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:54:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-01 23:54:41,065 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:54:41,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-01 23:54:41,066 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-01 23:54:41,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-01 23:54:41,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-01 23:54:41,067 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2019-10-01 23:54:41,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:41,121 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-10-01 23:54:41,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-01 23:54:41,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-01 23:54:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:41,123 INFO L225 Difference]: With dead ends: 34 [2019-10-01 23:54:41,124 INFO L226 Difference]: Without dead ends: 32 [2019-10-01 23:54:41,124 INFO L640 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 [2019-10-01 23:54:41,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-01 23:54:41,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-10-01 23:54:41,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-01 23:54:41,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-10-01 23:54:41,132 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 21 [2019-10-01 23:54:41,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:41,132 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-10-01 23:54:41,132 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-01 23:54:41,132 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-10-01 23:54:41,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-01 23:54:41,133 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:41,134 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:41,134 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:41,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:41,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1534454659, now seen corresponding path program 1 times [2019-10-01 23:54:41,135 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:41,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:41,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:41,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:54:41,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:41,154 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:41,155 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:41,155 INFO L224 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) [2019-10-01 23:54:41,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:54:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:54:41,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 23:54:41,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:54:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-01 23:54:41,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:54:41,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-01 23:54:41,281 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-01 23:54:41,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-01 23:54:41,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-01 23:54:41,282 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2019-10-01 23:54:41,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:41,364 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2019-10-01 23:54:41,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-01 23:54:41,365 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-01 23:54:41,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:41,368 INFO L225 Difference]: With dead ends: 73 [2019-10-01 23:54:41,369 INFO L226 Difference]: Without dead ends: 51 [2019-10-01 23:54:41,369 INFO L640 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 [2019-10-01 23:54:41,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-01 23:54:41,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2019-10-01 23:54:41,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-01 23:54:41,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-10-01 23:54:41,379 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2019-10-01 23:54:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:41,379 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-10-01 23:54:41,379 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-01 23:54:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-10-01 23:54:41,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-01 23:54:41,381 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:41,381 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:41,381 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:41,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:41,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1606017140, now seen corresponding path program 2 times [2019-10-01 23:54:41,382 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:41,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:41,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:41,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:54:41,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:41,401 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:41,401 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:41,401 INFO L224 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:54:41,435 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:54:41,469 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:54:41,469 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:54:41,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-01 23:54:41,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:54:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-01 23:54:41,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:54:41,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-01 23:54:41,506 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-01 23:54:41,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-01 23:54:41,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 23:54:41,507 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 5 states. [2019-10-01 23:54:41,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:41,635 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2019-10-01 23:54:41,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-01 23:54:41,636 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-10-01 23:54:41,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:41,638 INFO L225 Difference]: With dead ends: 87 [2019-10-01 23:54:41,638 INFO L226 Difference]: Without dead ends: 62 [2019-10-01 23:54:41,639 INFO L640 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 [2019-10-01 23:54:41,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-01 23:54:41,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 41. [2019-10-01 23:54:41,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-01 23:54:41,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-10-01 23:54:41,648 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 26 [2019-10-01 23:54:41,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:41,648 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-10-01 23:54:41,648 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-01 23:54:41,649 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-10-01 23:54:41,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-01 23:54:41,650 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:41,650 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:41,650 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:41,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:41,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1732161177, now seen corresponding path program 3 times [2019-10-01 23:54:41,651 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:41,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:41,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:41,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:54:41,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:41,669 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:41,670 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:41,670 INFO L224 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) [2019-10-01 23:54:41,695 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:54:41,727 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-01 23:54:41,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:54:41,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-01 23:54:41,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:54:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-01 23:54:41,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:54:41,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-01 23:54:41,760 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-01 23:54:41,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-01 23:54:41,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-01 23:54:41,760 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 6 states. [2019-10-01 23:54:41,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:41,929 INFO L93 Difference]: Finished difference Result 101 states and 128 transitions. [2019-10-01 23:54:41,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-01 23:54:41,930 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-10-01 23:54:41,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:41,931 INFO L225 Difference]: With dead ends: 101 [2019-10-01 23:54:41,931 INFO L226 Difference]: Without dead ends: 73 [2019-10-01 23:54:41,932 INFO L640 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 [2019-10-01 23:54:41,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-01 23:54:41,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2019-10-01 23:54:41,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-01 23:54:41,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2019-10-01 23:54:41,941 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 31 [2019-10-01 23:54:41,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:41,942 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2019-10-01 23:54:41,942 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-01 23:54:41,942 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2019-10-01 23:54:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-01 23:54:41,943 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:41,943 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:41,943 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:41,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:41,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1392382608, now seen corresponding path program 4 times [2019-10-01 23:54:41,944 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:41,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:41,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:41,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:54:41,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:41,965 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:41,966 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:41,966 INFO L224 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:54:41,992 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:54:42,020 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:54:42,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:54:42,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-01 23:54:42,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:54:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-01 23:54:42,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:54:42,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-01 23:54:42,066 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-01 23:54:42,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-01 23:54:42,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-01 23:54:42,067 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 7 states. [2019-10-01 23:54:42,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:42,262 INFO L93 Difference]: Finished difference Result 115 states and 147 transitions. [2019-10-01 23:54:42,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-01 23:54:42,263 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-10-01 23:54:42,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:42,266 INFO L225 Difference]: With dead ends: 115 [2019-10-01 23:54:42,266 INFO L226 Difference]: Without dead ends: 84 [2019-10-01 23:54:42,267 INFO L640 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 [2019-10-01 23:54:42,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-01 23:54:42,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 51. [2019-10-01 23:54:42,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-01 23:54:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2019-10-01 23:54:42,280 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 36 [2019-10-01 23:54:42,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:42,281 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2019-10-01 23:54:42,281 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-01 23:54:42,281 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2019-10-01 23:54:42,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-01 23:54:42,285 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:42,286 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:42,286 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:42,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:42,286 INFO L82 PathProgramCache]: Analyzing trace with hash 267511989, now seen corresponding path program 5 times [2019-10-01 23:54:42,287 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:42,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:42,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:42,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:54:42,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:42,335 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:42,335 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:42,335 INFO L224 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 [2019-10-01 23:54:42,355 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 23:54:42,416 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-01 23:54:42,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:54:42,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-01 23:54:42,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:54:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-01 23:54:42,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:54:42,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-01 23:54:42,475 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-01 23:54:42,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-01 23:54:42,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-01 23:54:42,476 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 8 states. [2019-10-01 23:54:42,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:42,678 INFO L93 Difference]: Finished difference Result 129 states and 166 transitions. [2019-10-01 23:54:42,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-01 23:54:42,679 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2019-10-01 23:54:42,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:42,680 INFO L225 Difference]: With dead ends: 129 [2019-10-01 23:54:42,680 INFO L226 Difference]: Without dead ends: 95 [2019-10-01 23:54:42,684 INFO L640 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 [2019-10-01 23:54:42,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-10-01 23:54:42,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 56. [2019-10-01 23:54:42,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-01 23:54:42,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2019-10-01 23:54:42,701 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 41 [2019-10-01 23:54:42,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:42,704 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2019-10-01 23:54:42,704 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-01 23:54:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2019-10-01 23:54:42,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-01 23:54:42,706 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:42,706 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:42,710 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:42,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:42,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2052078420, now seen corresponding path program 6 times [2019-10-01 23:54:42,711 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:42,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:42,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:42,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:54:42,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:42,758 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:42,759 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:42,759 INFO L224 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) [2019-10-01 23:54:42,785 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:54:42,857 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-01 23:54:42,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:54:42,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-01 23:54:42,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:54:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-01 23:54:42,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:54:42,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-01 23:54:42,952 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-01 23:54:42,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-01 23:54:42,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-01 23:54:42,953 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 9 states. [2019-10-01 23:54:43,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:43,125 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2019-10-01 23:54:43,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-01 23:54:43,126 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2019-10-01 23:54:43,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:43,127 INFO L225 Difference]: With dead ends: 143 [2019-10-01 23:54:43,127 INFO L226 Difference]: Without dead ends: 106 [2019-10-01 23:54:43,128 INFO L640 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 [2019-10-01 23:54:43,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-01 23:54:43,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 61. [2019-10-01 23:54:43,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-01 23:54:43,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2019-10-01 23:54:43,138 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 46 [2019-10-01 23:54:43,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:43,138 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2019-10-01 23:54:43,139 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-01 23:54:43,139 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2019-10-01 23:54:43,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-01 23:54:43,140 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:43,140 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:43,140 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:43,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:43,140 INFO L82 PathProgramCache]: Analyzing trace with hash -90078511, now seen corresponding path program 7 times [2019-10-01 23:54:43,140 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:43,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:43,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:43,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:54:43,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:43,159 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:43,160 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:43,160 INFO L224 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 [2019-10-01 23:54:43,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:54:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:54:43,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-01 23:54:43,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:54:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-01 23:54:43,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:54:43,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-01 23:54:43,280 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-01 23:54:43,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-01 23:54:43,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-01 23:54:43,281 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 10 states. [2019-10-01 23:54:43,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:43,530 INFO L93 Difference]: Finished difference Result 157 states and 204 transitions. [2019-10-01 23:54:43,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-01 23:54:43,531 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2019-10-01 23:54:43,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:43,532 INFO L225 Difference]: With dead ends: 157 [2019-10-01 23:54:43,532 INFO L226 Difference]: Without dead ends: 117 [2019-10-01 23:54:43,533 INFO L640 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 [2019-10-01 23:54:43,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-01 23:54:43,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 66. [2019-10-01 23:54:43,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-01 23:54:43,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2019-10-01 23:54:43,555 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 51 [2019-10-01 23:54:43,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:43,555 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2019-10-01 23:54:43,555 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-01 23:54:43,555 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2019-10-01 23:54:43,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-01 23:54:43,556 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:43,556 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:43,556 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:43,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:43,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1181960504, now seen corresponding path program 8 times [2019-10-01 23:54:43,557 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:43,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:43,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:43,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:54:43,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:43,595 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:43,595 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:43,596 INFO L224 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) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:54:43,626 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:54:43,657 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:54:43,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:54:43,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-01 23:54:43,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:54:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-01 23:54:43,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:54:43,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-01 23:54:43,738 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-01 23:54:43,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-01 23:54:43,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-01 23:54:43,739 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand 11 states. [2019-10-01 23:54:43,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:43,895 INFO L93 Difference]: Finished difference Result 171 states and 223 transitions. [2019-10-01 23:54:43,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-01 23:54:43,895 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2019-10-01 23:54:43,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:43,897 INFO L225 Difference]: With dead ends: 171 [2019-10-01 23:54:43,897 INFO L226 Difference]: Without dead ends: 128 [2019-10-01 23:54:43,898 INFO L640 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 [2019-10-01 23:54:43,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-10-01 23:54:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 71. [2019-10-01 23:54:43,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-01 23:54:43,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2019-10-01 23:54:43,906 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 56 [2019-10-01 23:54:43,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:43,907 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2019-10-01 23:54:43,907 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-01 23:54:43,907 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2019-10-01 23:54:43,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-01 23:54:43,910 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:43,911 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:43,911 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:43,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:43,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1976253677, now seen corresponding path program 9 times [2019-10-01 23:54:43,911 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:43,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:43,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:43,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:54:43,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:43,930 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:43,930 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:43,930 INFO L224 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) [2019-10-01 23:54:43,957 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:54:44,186 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-01 23:54:44,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:54:44,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-01 23:54:44,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:54:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-01 23:54:44,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:54:44,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-01 23:54:44,267 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-01 23:54:44,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-01 23:54:44,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-01 23:54:44,268 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2019-10-01 23:54:44,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:44,484 INFO L93 Difference]: Finished difference Result 185 states and 242 transitions. [2019-10-01 23:54:44,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-01 23:54:44,485 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2019-10-01 23:54:44,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:44,486 INFO L225 Difference]: With dead ends: 185 [2019-10-01 23:54:44,486 INFO L226 Difference]: Without dead ends: 139 [2019-10-01 23:54:44,487 INFO L640 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 [2019-10-01 23:54:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-10-01 23:54:44,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 76. [2019-10-01 23:54:44,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-01 23:54:44,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2019-10-01 23:54:44,495 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 61 [2019-10-01 23:54:44,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:44,496 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2019-10-01 23:54:44,496 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-01 23:54:44,496 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2019-10-01 23:54:44,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-01 23:54:44,497 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:44,497 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:44,497 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:44,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:44,498 INFO L82 PathProgramCache]: Analyzing trace with hash 254629660, now seen corresponding path program 10 times [2019-10-01 23:54:44,498 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:44,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:44,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:44,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:54:44,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:44,516 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:44,517 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:44,517 INFO L224 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 [2019-10-01 23:54:44,540 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:54:44,571 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:54:44,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:54:44,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-01 23:54:44,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:54:44,673 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-10-01 23:54:44,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:54:44,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-01 23:54:44,677 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-01 23:54:44,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-01 23:54:44,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-01 23:54:44,678 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand 13 states. [2019-10-01 23:54:44,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:44,957 INFO L93 Difference]: Finished difference Result 199 states and 261 transitions. [2019-10-01 23:54:44,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-01 23:54:44,958 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2019-10-01 23:54:44,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:44,959 INFO L225 Difference]: With dead ends: 199 [2019-10-01 23:54:44,959 INFO L226 Difference]: Without dead ends: 150 [2019-10-01 23:54:44,960 INFO L640 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 [2019-10-01 23:54:44,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-10-01 23:54:44,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 81. [2019-10-01 23:54:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-01 23:54:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2019-10-01 23:54:44,967 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 66 [2019-10-01 23:54:44,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:44,968 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2019-10-01 23:54:44,968 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-01 23:54:44,968 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2019-10-01 23:54:44,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-01 23:54:44,969 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:44,969 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:44,969 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:44,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:44,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1584191241, now seen corresponding path program 11 times [2019-10-01 23:54:44,970 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:44,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:44,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:44,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:54:44,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:44,988 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:44,988 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:44,988 INFO L224 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 [2019-10-01 23:54:45,015 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 23:54:45,411 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-01 23:54:45,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:54:45,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-01 23:54:45,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:54:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-01 23:54:45,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:54:45,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-01 23:54:45,543 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-01 23:54:45,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-01 23:54:45,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-01 23:54:45,544 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 14 states. [2019-10-01 23:54:45,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:45,798 INFO L93 Difference]: Finished difference Result 213 states and 280 transitions. [2019-10-01 23:54:45,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-01 23:54:45,799 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2019-10-01 23:54:45,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:45,801 INFO L225 Difference]: With dead ends: 213 [2019-10-01 23:54:45,801 INFO L226 Difference]: Without dead ends: 161 [2019-10-01 23:54:45,802 INFO L640 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 [2019-10-01 23:54:45,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-10-01 23:54:45,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 86. [2019-10-01 23:54:45,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-01 23:54:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2019-10-01 23:54:45,809 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 71 [2019-10-01 23:54:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:45,809 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2019-10-01 23:54:45,809 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-01 23:54:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2019-10-01 23:54:45,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-01 23:54:45,810 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:45,811 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:45,811 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:45,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:45,811 INFO L82 PathProgramCache]: Analyzing trace with hash -171924224, now seen corresponding path program 12 times [2019-10-01 23:54:45,811 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:45,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:45,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:45,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:54:45,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:45,828 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:45,829 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:45,829 INFO L224 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 [2019-10-01 23:54:45,863 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 23:54:46,361 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-01 23:54:46,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:54:46,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-01 23:54:46,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:54:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 23:54:46,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:54:46,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-01 23:54:46,486 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-01 23:54:46,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-01 23:54:46,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-01 23:54:46,488 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand 15 states. [2019-10-01 23:54:46,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:46,762 INFO L93 Difference]: Finished difference Result 227 states and 299 transitions. [2019-10-01 23:54:46,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-01 23:54:46,762 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 76 [2019-10-01 23:54:46,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:46,764 INFO L225 Difference]: With dead ends: 227 [2019-10-01 23:54:46,764 INFO L226 Difference]: Without dead ends: 172 [2019-10-01 23:54:46,765 INFO L640 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 [2019-10-01 23:54:46,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-10-01 23:54:46,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 91. [2019-10-01 23:54:46,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-01 23:54:46,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2019-10-01 23:54:46,772 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 76 [2019-10-01 23:54:46,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:46,774 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2019-10-01 23:54:46,774 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-01 23:54:46,775 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2019-10-01 23:54:46,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-01 23:54:46,776 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:46,776 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:46,776 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:46,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:46,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1140584155, now seen corresponding path program 13 times [2019-10-01 23:54:46,777 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:46,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:46,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:46,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:54:46,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:46,801 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:46,802 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:46,802 INFO L224 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) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:54:46,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:54:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:54:46,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-01 23:54:46,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:54:47,031 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 23:54:47,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:54:47,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-01 23:54:47,037 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-01 23:54:47,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-01 23:54:47,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-01 23:54:47,038 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 16 states. [2019-10-01 23:54:47,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:47,366 INFO L93 Difference]: Finished difference Result 241 states and 318 transitions. [2019-10-01 23:54:47,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-01 23:54:47,366 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2019-10-01 23:54:47,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:47,368 INFO L225 Difference]: With dead ends: 241 [2019-10-01 23:54:47,368 INFO L226 Difference]: Without dead ends: 183 [2019-10-01 23:54:47,369 INFO L640 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 [2019-10-01 23:54:47,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-10-01 23:54:47,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 96. [2019-10-01 23:54:47,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-10-01 23:54:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2019-10-01 23:54:47,376 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 81 [2019-10-01 23:54:47,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:47,377 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2019-10-01 23:54:47,377 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-01 23:54:47,377 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2019-10-01 23:54:47,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-01 23:54:47,378 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:47,378 INFO L411 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:47,378 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:47,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:47,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1561365788, now seen corresponding path program 14 times [2019-10-01 23:54:47,379 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:47,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:47,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:47,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:54:47,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:47,394 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:47,394 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:47,395 INFO L224 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) [2019-10-01 23:54:47,422 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:54:47,456 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:54:47,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:54:47,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-01 23:54:47,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:54:47,597 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 [2019-10-01 23:54:47,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:54:47,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-01 23:54:47,606 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-01 23:54:47,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-01 23:54:47,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-01 23:54:47,608 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand 17 states. [2019-10-01 23:54:47,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:47,936 INFO L93 Difference]: Finished difference Result 255 states and 337 transitions. [2019-10-01 23:54:47,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-01 23:54:47,936 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 86 [2019-10-01 23:54:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:47,938 INFO L225 Difference]: With dead ends: 255 [2019-10-01 23:54:47,938 INFO L226 Difference]: Without dead ends: 194 [2019-10-01 23:54:47,939 INFO L640 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 [2019-10-01 23:54:47,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-10-01 23:54:47,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 101. [2019-10-01 23:54:47,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-01 23:54:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2019-10-01 23:54:47,947 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 86 [2019-10-01 23:54:47,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:47,947 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2019-10-01 23:54:47,947 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-01 23:54:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2019-10-01 23:54:47,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-01 23:54:47,949 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:47,949 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:47,949 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:47,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:47,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1552853825, now seen corresponding path program 15 times [2019-10-01 23:54:47,950 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:47,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:47,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:47,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:54:47,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:47,965 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:47,965 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:47,965 INFO L224 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 [2019-10-01 23:54:47,992 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 23:54:48,648 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-10-01 23:54:48,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:54:48,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-01 23:54:48,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:54:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-01 23:54:48,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:54:48,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-01 23:54:48,811 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-01 23:54:48,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-01 23:54:48,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-01 23:54:48,812 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand 18 states. [2019-10-01 23:54:49,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:49,196 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2019-10-01 23:54:49,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-01 23:54:49,197 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2019-10-01 23:54:49,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:49,199 INFO L225 Difference]: With dead ends: 269 [2019-10-01 23:54:49,201 INFO L226 Difference]: Without dead ends: 205 [2019-10-01 23:54:49,202 INFO L640 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 [2019-10-01 23:54:49,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-10-01 23:54:49,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 106. [2019-10-01 23:54:49,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-01 23:54:49,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2019-10-01 23:54:49,214 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 91 [2019-10-01 23:54:49,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:49,214 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2019-10-01 23:54:49,214 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-01 23:54:49,215 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2019-10-01 23:54:49,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-01 23:54:49,215 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:49,216 INFO L411 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:49,216 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:49,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:49,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1426325304, now seen corresponding path program 16 times [2019-10-01 23:54:49,216 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:49,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:49,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:49,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:54:49,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:49,242 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:49,243 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:49,243 INFO L224 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 [2019-10-01 23:54:49,273 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:54:49,321 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:54:49,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:54:49,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-01 23:54:49,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:54:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-10-01 23:54:49,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:54:49,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-01 23:54:49,524 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-01 23:54:49,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-01 23:54:49,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-01 23:54:49,525 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand 19 states. [2019-10-01 23:54:49,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:49,911 INFO L93 Difference]: Finished difference Result 283 states and 375 transitions. [2019-10-01 23:54:49,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-01 23:54:49,912 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 96 [2019-10-01 23:54:49,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:49,914 INFO L225 Difference]: With dead ends: 283 [2019-10-01 23:54:49,914 INFO L226 Difference]: Without dead ends: 216 [2019-10-01 23:54:49,915 INFO L640 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 [2019-10-01 23:54:49,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-10-01 23:54:49,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 111. [2019-10-01 23:54:49,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-01 23:54:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2019-10-01 23:54:49,925 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 96 [2019-10-01 23:54:49,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:49,925 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2019-10-01 23:54:49,925 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-01 23:54:49,926 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2019-10-01 23:54:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-01 23:54:49,927 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:49,927 INFO L411 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:49,927 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:49,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:49,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1888118109, now seen corresponding path program 17 times [2019-10-01 23:54:49,928 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:49,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:49,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:49,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:54:49,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:49,945 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:49,945 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:49,945 INFO L224 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) [2019-10-01 23:54:49,977 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:54:51,712 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-01 23:54:51,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:54:51,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-01 23:54:51,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:54:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 23:54:51,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:54:51,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-01 23:54:51,893 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-01 23:54:51,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-01 23:54:51,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-01 23:54:51,894 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand 20 states. [2019-10-01 23:54:52,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:52,269 INFO L93 Difference]: Finished difference Result 297 states and 394 transitions. [2019-10-01 23:54:52,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-01 23:54:52,269 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2019-10-01 23:54:52,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:52,271 INFO L225 Difference]: With dead ends: 297 [2019-10-01 23:54:52,271 INFO L226 Difference]: Without dead ends: 227 [2019-10-01 23:54:52,272 INFO L640 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 [2019-10-01 23:54:52,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-10-01 23:54:52,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 116. [2019-10-01 23:54:52,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-10-01 23:54:52,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2019-10-01 23:54:52,282 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 101 [2019-10-01 23:54:52,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:52,282 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2019-10-01 23:54:52,282 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-01 23:54:52,282 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2019-10-01 23:54:52,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-01 23:54:52,283 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:52,283 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:52,284 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:52,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:52,284 INFO L82 PathProgramCache]: Analyzing trace with hash -240611668, now seen corresponding path program 18 times [2019-10-01 23:54:52,284 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:52,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:52,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:52,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:54:52,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:52,298 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:52,298 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:52,299 INFO L224 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) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:54:52,337 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 23:54:54,512 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-01 23:54:54,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:54:54,515 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-01 23:54:54,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:54:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-10-01 23:54:54,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:54:54,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-10-01 23:54:54,715 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-01 23:54:54,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-01 23:54:54,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-01 23:54:54,716 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand 21 states. [2019-10-01 23:54:55,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:55,110 INFO L93 Difference]: Finished difference Result 311 states and 413 transitions. [2019-10-01 23:54:55,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-01 23:54:55,112 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 106 [2019-10-01 23:54:55,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:55,113 INFO L225 Difference]: With dead ends: 311 [2019-10-01 23:54:55,113 INFO L226 Difference]: Without dead ends: 238 [2019-10-01 23:54:55,114 INFO L640 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 [2019-10-01 23:54:55,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-10-01 23:54:55,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 121. [2019-10-01 23:54:55,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-01 23:54:55,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2019-10-01 23:54:55,124 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 106 [2019-10-01 23:54:55,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:55,124 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2019-10-01 23:54:55,125 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-01 23:54:55,125 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2019-10-01 23:54:55,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-01 23:54:55,126 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:55,126 INFO L411 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:55,126 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:55,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:55,126 INFO L82 PathProgramCache]: Analyzing trace with hash 653590393, now seen corresponding path program 19 times [2019-10-01 23:54:55,127 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:55,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:55,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:55,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:54:55,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:55,142 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:55,142 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:55,142 INFO L224 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 [2019-10-01 23:54:55,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:54:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:54:55,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-01 23:54:55,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:54:55,421 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Exception during sending of exit command (exit): Stream closed [2019-10-01 23:54:55,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:54:55,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-01 23:54:55,426 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-01 23:54:55,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-01 23:54:55,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-01 23:54:55,426 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand 22 states. [2019-10-01 23:54:55,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:55,794 INFO L93 Difference]: Finished difference Result 325 states and 432 transitions. [2019-10-01 23:54:55,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-01 23:54:55,795 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 111 [2019-10-01 23:54:55,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:55,797 INFO L225 Difference]: With dead ends: 325 [2019-10-01 23:54:55,797 INFO L226 Difference]: Without dead ends: 249 [2019-10-01 23:54:55,798 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-01 23:54:55,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-10-01 23:54:55,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 126. [2019-10-01 23:54:55,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-10-01 23:54:55,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2019-10-01 23:54:55,810 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 111 [2019-10-01 23:54:55,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:55,810 INFO L475 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2019-10-01 23:54:55,810 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-01 23:54:55,810 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2019-10-01 23:54:55,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-01 23:54:55,812 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:55,812 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:55,812 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:55,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:55,812 INFO L82 PathProgramCache]: Analyzing trace with hash 238509200, now seen corresponding path program 20 times [2019-10-01 23:54:55,812 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:55,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:55,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:55,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:54:55,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:55,835 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:55,836 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:55,836 INFO L224 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) [2019-10-01 23:54:55,879 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:54:55,923 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:54:55,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:54:55,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-01 23:54:55,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:54:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-10-01 23:54:56,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:54:56,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-10-01 23:54:56,183 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-01 23:54:56,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-01 23:54:56,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-10-01 23:54:56,184 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand 23 states. [2019-10-01 23:54:56,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:54:56,748 INFO L93 Difference]: Finished difference Result 339 states and 451 transitions. [2019-10-01 23:54:56,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-01 23:54:56,748 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 116 [2019-10-01 23:54:56,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:54:56,750 INFO L225 Difference]: With dead ends: 339 [2019-10-01 23:54:56,750 INFO L226 Difference]: Without dead ends: 260 [2019-10-01 23:54:56,751 INFO L640 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 [2019-10-01 23:54:56,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-10-01 23:54:56,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 131. [2019-10-01 23:54:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-10-01 23:54:56,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 155 transitions. [2019-10-01 23:54:56,764 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 155 transitions. Word has length 116 [2019-10-01 23:54:56,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:54:56,765 INFO L475 AbstractCegarLoop]: Abstraction has 131 states and 155 transitions. [2019-10-01 23:54:56,765 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-01 23:54:56,765 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 155 transitions. [2019-10-01 23:54:56,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-01 23:54:56,766 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:54:56,766 INFO L411 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:54:56,766 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:54:56,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:54:56,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1229732245, now seen corresponding path program 21 times [2019-10-01 23:54:56,767 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:54:56,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:54:56,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:56,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:54:56,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:54:56,782 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:54:56,782 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:54:56,782 INFO L224 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) [2019-10-01 23:54:56,814 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:55:00,280 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-10-01 23:55:00,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:55:00,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-01 23:55:00,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:55:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-10-01 23:55:00,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:55:00,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-10-01 23:55:00,537 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-01 23:55:00,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-01 23:55:00,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-10-01 23:55:00,537 INFO L87 Difference]: Start difference. First operand 131 states and 155 transitions. Second operand 24 states. [2019-10-01 23:55:01,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:55:01,083 INFO L93 Difference]: Finished difference Result 353 states and 470 transitions. [2019-10-01 23:55:01,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-01 23:55:01,084 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2019-10-01 23:55:01,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:55:01,088 INFO L225 Difference]: With dead ends: 353 [2019-10-01 23:55:01,088 INFO L226 Difference]: Without dead ends: 271 [2019-10-01 23:55:01,089 INFO L640 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 [2019-10-01 23:55:01,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-10-01 23:55:01,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 136. [2019-10-01 23:55:01,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-10-01 23:55:01,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 161 transitions. [2019-10-01 23:55:01,100 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 161 transitions. Word has length 121 [2019-10-01 23:55:01,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:55:01,101 INFO L475 AbstractCegarLoop]: Abstraction has 136 states and 161 transitions. [2019-10-01 23:55:01,101 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-01 23:55:01,101 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 161 transitions. [2019-10-01 23:55:01,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-01 23:55:01,102 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:55:01,102 INFO L411 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:55:01,102 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:55:01,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:55:01,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1351964044, now seen corresponding path program 22 times [2019-10-01 23:55:01,103 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:55:01,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:55:01,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:55:01,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:55:01,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:55:01,118 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:55:01,119 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:55:01,119 INFO L224 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) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:55:01,171 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:55:01,218 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:55:01,219 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:55:01,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-01 23:55:01,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:55:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-10-01 23:55:01,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:55:01,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-10-01 23:55:01,480 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-01 23:55:01,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-01 23:55:01,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-10-01 23:55:01,481 INFO L87 Difference]: Start difference. First operand 136 states and 161 transitions. Second operand 25 states. [2019-10-01 23:55:02,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:55:02,147 INFO L93 Difference]: Finished difference Result 367 states and 489 transitions. [2019-10-01 23:55:02,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-01 23:55:02,147 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-10-01 23:55:02,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:55:02,149 INFO L225 Difference]: With dead ends: 367 [2019-10-01 23:55:02,150 INFO L226 Difference]: Without dead ends: 282 [2019-10-01 23:55:02,150 INFO L640 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 [2019-10-01 23:55:02,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-10-01 23:55:02,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 141. [2019-10-01 23:55:02,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-10-01 23:55:02,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 167 transitions. [2019-10-01 23:55:02,194 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 167 transitions. Word has length 126 [2019-10-01 23:55:02,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:55:02,194 INFO L475 AbstractCegarLoop]: Abstraction has 141 states and 167 transitions. [2019-10-01 23:55:02,194 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-01 23:55:02,194 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 167 transitions. [2019-10-01 23:55:02,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-01 23:55:02,195 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:55:02,196 INFO L411 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:55:02,196 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:55:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:55:02,196 INFO L82 PathProgramCache]: Analyzing trace with hash -678571087, now seen corresponding path program 23 times [2019-10-01 23:55:02,196 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:55:02,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:55:02,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:55:02,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:55:02,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:55:02,217 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:55:02,217 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:55:02,218 INFO L224 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 [2019-10-01 23:55:02,247 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 23:55:45,008 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-10-01 23:55:45,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:55:45,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-01 23:55:45,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:55:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2019-10-01 23:55:45,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:55:45,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-10-01 23:55:45,299 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-01 23:55:45,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-01 23:55:45,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-10-01 23:55:45,300 INFO L87 Difference]: Start difference. First operand 141 states and 167 transitions. Second operand 26 states. [2019-10-01 23:55:46,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:55:46,142 INFO L93 Difference]: Finished difference Result 381 states and 508 transitions. [2019-10-01 23:55:46,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-01 23:55:46,143 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 131 [2019-10-01 23:55:46,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:55:46,145 INFO L225 Difference]: With dead ends: 381 [2019-10-01 23:55:46,145 INFO L226 Difference]: Without dead ends: 293 [2019-10-01 23:55:46,146 INFO L640 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 [2019-10-01 23:55:46,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2019-10-01 23:55:46,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 146. [2019-10-01 23:55:46,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-10-01 23:55:46,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 173 transitions. [2019-10-01 23:55:46,160 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 173 transitions. Word has length 131 [2019-10-01 23:55:46,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:55:46,161 INFO L475 AbstractCegarLoop]: Abstraction has 146 states and 173 transitions. [2019-10-01 23:55:46,161 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-01 23:55:46,161 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 173 transitions. [2019-10-01 23:55:46,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-01 23:55:46,162 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:55:46,162 INFO L411 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:55:46,162 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:55:46,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:55:46,162 INFO L82 PathProgramCache]: Analyzing trace with hash -8079272, now seen corresponding path program 24 times [2019-10-01 23:55:46,162 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:55:46,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:55:46,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:55:46,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:55:46,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:55:46,183 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:55:46,183 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:55:46,184 INFO L224 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) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:55:46,211 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 23:58:07,761 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-10-01 23:58:07,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:58:07,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-01 23:58:07,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:58:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2019-10-01 23:58:08,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:58:08,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-10-01 23:58:08,168 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-01 23:58:08,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-01 23:58:08,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-10-01 23:58:08,169 INFO L87 Difference]: Start difference. First operand 146 states and 173 transitions. Second operand 27 states. [2019-10-01 23:58:08,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:58:08,783 INFO L93 Difference]: Finished difference Result 395 states and 527 transitions. [2019-10-01 23:58:08,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-01 23:58:08,783 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 136 [2019-10-01 23:58:08,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:58:08,785 INFO L225 Difference]: With dead ends: 395 [2019-10-01 23:58:08,785 INFO L226 Difference]: Without dead ends: 304 [2019-10-01 23:58:08,786 INFO L640 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 [2019-10-01 23:58:08,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2019-10-01 23:58:08,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 151. [2019-10-01 23:58:08,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-10-01 23:58:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 179 transitions. [2019-10-01 23:58:08,800 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 179 transitions. Word has length 136 [2019-10-01 23:58:08,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:58:08,800 INFO L475 AbstractCegarLoop]: Abstraction has 151 states and 179 transitions. [2019-10-01 23:58:08,801 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-01 23:58:08,801 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 179 transitions. [2019-10-01 23:58:08,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-01 23:58:08,801 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:58:08,802 INFO L411 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:58:08,802 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:58:08,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:58:08,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1539863091, now seen corresponding path program 25 times [2019-10-01 23:58:08,803 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:58:08,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:58:08,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:58:08,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:58:08,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:58:08,821 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:58:08,821 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:58:08,822 INFO L224 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 [2019-10-01 23:58:08,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:58:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:58:08,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-01 23:58:08,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:58:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-10-01 23:58:09,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:58:09,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-10-01 23:58:09,382 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-01 23:58:09,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-01 23:58:09,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-10-01 23:58:09,383 INFO L87 Difference]: Start difference. First operand 151 states and 179 transitions. Second operand 28 states. [2019-10-01 23:58:10,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:58:10,062 INFO L93 Difference]: Finished difference Result 409 states and 546 transitions. [2019-10-01 23:58:10,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-01 23:58:10,063 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 141 [2019-10-01 23:58:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:58:10,065 INFO L225 Difference]: With dead ends: 409 [2019-10-01 23:58:10,065 INFO L226 Difference]: Without dead ends: 315 [2019-10-01 23:58:10,066 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-10-01 23:58:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2019-10-01 23:58:10,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 156. [2019-10-01 23:58:10,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-10-01 23:58:10,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 185 transitions. [2019-10-01 23:58:10,082 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 185 transitions. Word has length 141 [2019-10-01 23:58:10,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:58:10,082 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 185 transitions. [2019-10-01 23:58:10,082 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-01 23:58:10,082 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 185 transitions. [2019-10-01 23:58:10,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-01 23:58:10,083 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:58:10,083 INFO L411 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:58:10,084 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:58:10,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:58:10,084 INFO L82 PathProgramCache]: Analyzing trace with hash 138921532, now seen corresponding path program 26 times [2019-10-01 23:58:10,084 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:58:10,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:58:10,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:58:10,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:58:10,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:58:10,111 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:58:10,111 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:58:10,111 INFO L224 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) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:58:10,147 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:58:10,202 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:58:10,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:58:10,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-01 23:58:10,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:58:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2019-10-01 23:58:10,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:58:10,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-10-01 23:58:10,586 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-01 23:58:10,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-01 23:58:10,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-10-01 23:58:10,587 INFO L87 Difference]: Start difference. First operand 156 states and 185 transitions. Second operand 29 states. [2019-10-01 23:58:11,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:58:11,288 INFO L93 Difference]: Finished difference Result 423 states and 565 transitions. [2019-10-01 23:58:11,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-01 23:58:11,288 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 146 [2019-10-01 23:58:11,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:58:11,290 INFO L225 Difference]: With dead ends: 423 [2019-10-01 23:58:11,290 INFO L226 Difference]: Without dead ends: 326 [2019-10-01 23:58:11,293 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-10-01 23:58:11,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-10-01 23:58:11,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 161. [2019-10-01 23:58:11,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-10-01 23:58:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 191 transitions. [2019-10-01 23:58:11,309 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 191 transitions. Word has length 146 [2019-10-01 23:58:11,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:58:11,310 INFO L475 AbstractCegarLoop]: Abstraction has 161 states and 191 transitions. [2019-10-01 23:58:11,310 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-01 23:58:11,310 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 191 transitions. [2019-10-01 23:58:11,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-01 23:58:11,312 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:58:11,312 INFO L411 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:58:11,312 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:58:11,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:58:11,312 INFO L82 PathProgramCache]: Analyzing trace with hash -263772183, now seen corresponding path program 27 times [2019-10-01 23:58:11,312 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:58:11,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:58:11,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:58:11,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:58:11,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:58:11,340 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:58:11,340 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:58:11,340 INFO L224 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) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:58:11,374 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 23:58:23,369 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-10-01 23:58:23,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:58:23,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-01 23:58:23,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:58:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 23:58:23,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:58:23,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-10-01 23:58:23,940 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-01 23:58:23,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-01 23:58:23,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-10-01 23:58:23,941 INFO L87 Difference]: Start difference. First operand 161 states and 191 transitions. Second operand 30 states. [2019-10-01 23:58:24,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:58:24,768 INFO L93 Difference]: Finished difference Result 437 states and 584 transitions. [2019-10-01 23:58:24,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-01 23:58:24,768 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 151 [2019-10-01 23:58:24,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:58:24,771 INFO L225 Difference]: With dead ends: 437 [2019-10-01 23:58:24,771 INFO L226 Difference]: Without dead ends: 337 [2019-10-01 23:58:24,773 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-10-01 23:58:24,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-10-01 23:58:24,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 166. [2019-10-01 23:58:24,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-10-01 23:58:24,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 197 transitions. [2019-10-01 23:58:24,789 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 197 transitions. Word has length 151 [2019-10-01 23:58:24,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:58:24,790 INFO L475 AbstractCegarLoop]: Abstraction has 166 states and 197 transitions. [2019-10-01 23:58:24,790 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-01 23:58:24,790 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 197 transitions. [2019-10-01 23:58:24,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-01 23:58:24,791 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:58:24,791 INFO L411 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:58:24,791 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:58:24,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:58:24,792 INFO L82 PathProgramCache]: Analyzing trace with hash 385225760, now seen corresponding path program 28 times [2019-10-01 23:58:24,792 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:58:24,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:58:24,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:58:24,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:58:24,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:58:24,812 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:58:24,813 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:58:24,813 INFO L224 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) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:58:24,858 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:58:24,917 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:58:24,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:58:24,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-01 23:58:24,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:58:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 23:58:25,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:58:25,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-10-01 23:58:25,363 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-01 23:58:25,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-01 23:58:25,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-10-01 23:58:25,364 INFO L87 Difference]: Start difference. First operand 166 states and 197 transitions. Second operand 31 states. [2019-10-01 23:58:26,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:58:26,199 INFO L93 Difference]: Finished difference Result 451 states and 603 transitions. [2019-10-01 23:58:26,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-01 23:58:26,199 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 156 [2019-10-01 23:58:26,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:58:26,201 INFO L225 Difference]: With dead ends: 451 [2019-10-01 23:58:26,202 INFO L226 Difference]: Without dead ends: 348 [2019-10-01 23:58:26,202 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-10-01 23:58:26,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2019-10-01 23:58:26,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 171. [2019-10-01 23:58:26,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-10-01 23:58:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 203 transitions. [2019-10-01 23:58:26,219 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 203 transitions. Word has length 156 [2019-10-01 23:58:26,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:58:26,220 INFO L475 AbstractCegarLoop]: Abstraction has 171 states and 203 transitions. [2019-10-01 23:58:26,220 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-01 23:58:26,220 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 203 transitions. [2019-10-01 23:58:26,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-01 23:58:26,221 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:58:26,221 INFO L411 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:58:26,221 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:58:26,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:58:26,222 INFO L82 PathProgramCache]: Analyzing trace with hash 121266693, now seen corresponding path program 29 times [2019-10-01 23:58:26,222 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:58:26,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:58:26,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:58:26,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:58:26,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:58:26,241 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:58:26,241 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:58:26,241 INFO L224 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 [2019-10-01 23:58:26,283 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 00:02:43,275 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-10-02 00:02:43,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:02:43,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-02 00:02:43,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:02:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-10-02 00:02:43,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:02:43,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-10-02 00:02:43,706 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-02 00:02:43,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-02 00:02:43,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-10-02 00:02:43,707 INFO L87 Difference]: Start difference. First operand 171 states and 203 transitions. Second operand 32 states. [2019-10-02 00:02:44,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:02:44,606 INFO L93 Difference]: Finished difference Result 465 states and 622 transitions. [2019-10-02 00:02:44,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-02 00:02:44,607 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 161 [2019-10-02 00:02:44,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:02:44,609 INFO L225 Difference]: With dead ends: 465 [2019-10-02 00:02:44,609 INFO L226 Difference]: Without dead ends: 359 [2019-10-02 00:02:44,610 INFO L640 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 [2019-10-02 00:02:44,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2019-10-02 00:02:44,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 176. [2019-10-02 00:02:44,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-10-02 00:02:44,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 209 transitions. [2019-10-02 00:02:44,630 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 209 transitions. Word has length 161 [2019-10-02 00:02:44,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:02:44,631 INFO L475 AbstractCegarLoop]: Abstraction has 176 states and 209 transitions. [2019-10-02 00:02:44,631 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-02 00:02:44,631 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 209 transitions. [2019-10-02 00:02:44,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-02 00:02:44,632 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:02:44,633 INFO L411 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:02:44,633 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:02:44,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:02:44,633 INFO L82 PathProgramCache]: Analyzing trace with hash 542237188, now seen corresponding path program 30 times [2019-10-02 00:02:44,633 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:02:44,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:02:44,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:02:44,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:02:44,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:02:44,659 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:02:44,659 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:02:44,659 INFO L224 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) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:02:44,700 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE