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/loop-new/count_by_k.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 12:03:54,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 12:03:54,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 12:03:54,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-05 12:03:54,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 12:03:54,728 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 12:03:54,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 12:03:54,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-05 12:03:54,745 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 12:03:54,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 12:03:54,746 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-05 12:03:54,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-05 12:03:54,747 INFO L138 SettingsManager]: * Use SBE=true [2019-09-05 12:03:54,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 12:03:54,747 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 12:03:54,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-05 12:03:54,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 12:03:54,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 12:03:54,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 12:03:54,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 12:03:54,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 12:03:54,748 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 12:03:54,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 12:03:54,749 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-05 12:03:54,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 12:03:54,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 12:03:54,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 12:03:54,750 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-05 12:03:54,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-05 12:03:54,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:03:54,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 12:03:54,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 12:03:54,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-05 12:03:54,751 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-05 12:03:54,751 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 12:03:54,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 12:03:54,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-05 12:03:54,778 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 12:03:54,790 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 12:03:54,793 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 12:03:54,794 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 12:03:54,795 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 12:03:54,795 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_k.i [2019-09-05 12:03:54,849 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0782712eb/3fc664aa8114415388aa91c12294b2f8/FLAG531f405ee [2019-09-05 12:03:55,241 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 12:03:55,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_k.i [2019-09-05 12:03:55,249 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0782712eb/3fc664aa8114415388aa91c12294b2f8/FLAG531f405ee [2019-09-05 12:03:55,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0782712eb/3fc664aa8114415388aa91c12294b2f8 [2019-09-05 12:03:55,617 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 12:03:55,619 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 12:03:55,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 12:03:55,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 12:03:55,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 12:03:55,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:03:55" (1/1) ... [2019-09-05 12:03:55,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ad267df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:03:55, skipping insertion in model container [2019-09-05 12:03:55,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:03:55" (1/1) ... [2019-09-05 12:03:55,635 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 12:03:55,652 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 12:03:55,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:03:55,832 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 12:03:55,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:03:55,857 INFO L192 MainTranslator]: Completed translation [2019-09-05 12:03:55,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:03:55 WrapperNode [2019-09-05 12:03:55,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 12:03:55,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 12:03:55,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 12:03:55,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 12:03:55,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:03:55" (1/1) ... [2019-09-05 12:03:55,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:03:55" (1/1) ... [2019-09-05 12:03:55,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:03:55" (1/1) ... [2019-09-05 12:03:55,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:03:55" (1/1) ... [2019-09-05 12:03:55,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:03:55" (1/1) ... [2019-09-05 12:03:55,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:03:55" (1/1) ... [2019-09-05 12:03:55,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:03:55" (1/1) ... [2019-09-05 12:03:55,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 12:03:55,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 12:03:55,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 12:03:55,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 12:03:55,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:03:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:03:56,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 12:03:56,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 12:03:56,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 12:03:56,024 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 12:03:56,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 12:03:56,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-05 12:03:56,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 12:03:56,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-05 12:03:56,025 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 12:03:56,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 12:03:56,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 12:03:56,173 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 12:03:56,173 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-05 12:03:56,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:03:56 BoogieIcfgContainer [2019-09-05 12:03:56,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 12:03:56,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 12:03:56,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 12:03:56,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 12:03:56,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 12:03:55" (1/3) ... [2019-09-05 12:03:56,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7c8905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:03:56, skipping insertion in model container [2019-09-05 12:03:56,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:03:55" (2/3) ... [2019-09-05 12:03:56,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7c8905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:03:56, skipping insertion in model container [2019-09-05 12:03:56,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:03:56" (3/3) ... [2019-09-05 12:03:56,185 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_k.i [2019-09-05 12:03:56,207 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 12:03:56,215 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 12:03:56,235 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 12:03:56,273 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-05 12:03:56,274 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 12:03:56,275 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-05 12:03:56,275 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 12:03:56,275 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 12:03:56,275 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 12:03:56,275 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 12:03:56,276 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 12:03:56,276 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 12:03:56,297 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-05 12:03:56,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-05 12:03:56,304 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:03:56,305 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:03:56,308 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:03:56,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:03:56,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1281911547, now seen corresponding path program 1 times [2019-09-05 12:03:56,316 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:03:56,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:03:56,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:03:56,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:03:56,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:03:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:03:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:03:56,433 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:03:56,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-05 12:03:56,437 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 12:03:56,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 12:03:56,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:03:56,449 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-09-05 12:03:56,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:03:56,467 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-09-05 12:03:56,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 12:03:56,469 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-09-05 12:03:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:03:56,476 INFO L225 Difference]: With dead ends: 32 [2019-09-05 12:03:56,476 INFO L226 Difference]: Without dead ends: 13 [2019-09-05 12:03:56,479 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:03:56,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-05 12:03:56,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-05 12:03:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-05 12:03:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-05 12:03:56,516 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-05 12:03:56,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:03:56,516 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-05 12:03:56,517 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 12:03:56,517 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-05 12:03:56,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-05 12:03:56,517 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:03:56,518 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:03:56,518 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:03:56,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:03:56,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1287452673, now seen corresponding path program 1 times [2019-09-05 12:03:56,519 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:03:56,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:03:56,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:03:56,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:03:56,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:03:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:03:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:03:56,718 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:03:56,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-05 12:03:56,721 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-05 12:03:56,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-05 12:03:56,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:03:56,722 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-09-05 12:03:56,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:03:56,787 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-09-05 12:03:56,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 12:03:56,788 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-09-05 12:03:56,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:03:56,789 INFO L225 Difference]: With dead ends: 19 [2019-09-05 12:03:56,789 INFO L226 Difference]: Without dead ends: 14 [2019-09-05 12:03:56,791 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:03:56,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-05 12:03:56,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-05 12:03:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-05 12:03:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-05 12:03:56,797 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2019-09-05 12:03:56,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:03:56,798 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-05 12:03:56,798 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-05 12:03:56,799 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-05 12:03:56,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-05 12:03:56,799 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:03:56,800 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:03:56,800 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:03:56,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:03:56,801 INFO L82 PathProgramCache]: Analyzing trace with hash 843923389, now seen corresponding path program 1 times [2019-09-05 12:03:56,801 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:03:56,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:03:56,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:03:56,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:03:56,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:03:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:03:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:03:56,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:03:56,960 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:03:56,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:03:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:03:56,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-05 12:03:57,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:03:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:03:57,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:03:57,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-09-05 12:03:57,087 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 12:03:57,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 12:03:57,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:03:57,088 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2019-09-05 12:03:57,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:03:57,246 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-09-05 12:03:57,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-05 12:03:57,249 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-09-05 12:03:57,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:03:57,250 INFO L225 Difference]: With dead ends: 29 [2019-09-05 12:03:57,250 INFO L226 Difference]: Without dead ends: 20 [2019-09-05 12:03:57,251 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-09-05 12:03:57,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-05 12:03:57,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-05 12:03:57,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-05 12:03:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-09-05 12:03:57,257 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2019-09-05 12:03:57,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:03:57,257 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-09-05 12:03:57,258 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 12:03:57,258 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-09-05 12:03:57,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-05 12:03:57,259 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:03:57,259 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:03:57,259 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:03:57,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:03:57,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1549375991, now seen corresponding path program 2 times [2019-09-05 12:03:57,260 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:03:57,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:03:57,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:03:57,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:03:57,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:03:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:03:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:03:57,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:03:57,373 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:03:57,391 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:03:57,406 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:03:57,406 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:03:57,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-05 12:03:57,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:03:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:03:57,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:03:57,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2019-09-05 12:03:57,492 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-05 12:03:57,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-05 12:03:57,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:03:57,493 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2019-09-05 12:03:57,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:03:57,743 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-09-05 12:03:57,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-05 12:03:57,744 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2019-09-05 12:03:57,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:03:57,745 INFO L225 Difference]: With dead ends: 33 [2019-09-05 12:03:57,745 INFO L226 Difference]: Without dead ends: 28 [2019-09-05 12:03:57,746 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-09-05 12:03:57,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-05 12:03:57,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-05 12:03:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-05 12:03:57,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-09-05 12:03:57,752 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 19 [2019-09-05 12:03:57,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:03:57,752 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-09-05 12:03:57,753 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-05 12:03:57,753 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-09-05 12:03:57,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-05 12:03:57,754 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:03:57,754 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:03:57,754 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:03:57,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:03:57,755 INFO L82 PathProgramCache]: Analyzing trace with hash -191187985, now seen corresponding path program 3 times [2019-09-05 12:03:57,755 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:03:57,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:03:57,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:03:57,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:03:57,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:03:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:03:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:03:57,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:03:57,891 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:03:57,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:03:57,921 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-05 12:03:57,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:03:57,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-05 12:03:57,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:03:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:03:58,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:03:58,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2019-09-05 12:03:58,018 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-05 12:03:58,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-05 12:03:58,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:03:58,020 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 15 states. [2019-09-05 12:03:58,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:03:58,356 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2019-09-05 12:03:58,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-05 12:03:58,358 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2019-09-05 12:03:58,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:03:58,359 INFO L225 Difference]: With dead ends: 41 [2019-09-05 12:03:58,359 INFO L226 Difference]: Without dead ends: 36 [2019-09-05 12:03:58,361 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2019-09-05 12:03:58,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-05 12:03:58,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-05 12:03:58,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-05 12:03:58,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-09-05 12:03:58,374 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 27 [2019-09-05 12:03:58,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:03:58,375 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-09-05 12:03:58,375 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-05 12:03:58,375 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-09-05 12:03:58,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-05 12:03:58,379 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:03:58,379 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:03:58,379 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:03:58,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:03:58,380 INFO L82 PathProgramCache]: Analyzing trace with hash 217994727, now seen corresponding path program 4 times [2019-09-05 12:03:58,380 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:03:58,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:03:58,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:03:58,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:03:58,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:03:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:03:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:03:58,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:03:58,665 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:03:58,691 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:03:58,715 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:03:58,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:03:58,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-05 12:03:58,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:03:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Stream Closed [2019-09-05 12:03:58,827 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:03:58,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2019-09-05 12:03:58,829 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-05 12:03:58,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-05 12:03:58,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:03:58,830 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 19 states. [2019-09-05 12:03:59,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:03:59,365 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2019-09-05 12:03:59,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-05 12:03:59,366 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2019-09-05 12:03:59,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:03:59,367 INFO L225 Difference]: With dead ends: 49 [2019-09-05 12:03:59,367 INFO L226 Difference]: Without dead ends: 44 [2019-09-05 12:03:59,368 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2019-09-05 12:03:59,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-05 12:03:59,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-09-05 12:03:59,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-05 12:03:59,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-09-05 12:03:59,375 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 35 [2019-09-05 12:03:59,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:03:59,376 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-09-05 12:03:59,376 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-05 12:03:59,376 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-09-05 12:03:59,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-05 12:03:59,377 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:03:59,378 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:03:59,378 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:03:59,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:03:59,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1099137057, now seen corresponding path program 5 times [2019-09-05 12:03:59,378 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:03:59,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:03:59,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:03:59,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:03:59,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:03:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:03:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:03:59,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:03:59,679 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:03:59,696 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:03:59,733 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-09-05 12:03:59,733 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:03:59,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-05 12:03:59,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:03:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:03:59,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:03:59,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 23 [2019-09-05 12:03:59,856 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-05 12:03:59,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-05 12:03:59,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:03:59,857 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 23 states. [2019-09-05 12:04:00,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:04:00,648 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2019-09-05 12:04:00,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-05 12:04:00,649 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 43 [2019-09-05 12:04:00,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:04:00,650 INFO L225 Difference]: With dead ends: 57 [2019-09-05 12:04:00,650 INFO L226 Difference]: Without dead ends: 52 [2019-09-05 12:04:00,652 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=467, Invalid=1255, Unknown=0, NotChecked=0, Total=1722 [2019-09-05 12:04:00,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-05 12:04:00,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-09-05 12:04:00,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-05 12:04:00,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-09-05 12:04:00,660 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 43 [2019-09-05 12:04:00,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:04:00,660 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-09-05 12:04:00,660 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-05 12:04:00,661 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-09-05 12:04:00,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-05 12:04:00,662 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:04:00,662 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:04:00,662 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:04:00,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:04:00,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1441975849, now seen corresponding path program 6 times [2019-09-05 12:04:00,663 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:04:00,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:04:00,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:00,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:04:00,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:04:01,016 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:01,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:04:01,016 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:04:01,027 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:04:01,053 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-09-05 12:04:01,053 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:04:01,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-05 12:04:01,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:04:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:01,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:04:01,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 27 [2019-09-05 12:04:01,177 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-05 12:04:01,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-05 12:04:01,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2019-09-05 12:04:01,179 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 27 states. [2019-09-05 12:04:02,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:04:02,369 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2019-09-05 12:04:02,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-05 12:04:02,370 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2019-09-05 12:04:02,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:04:02,372 INFO L225 Difference]: With dead ends: 65 [2019-09-05 12:04:02,372 INFO L226 Difference]: Without dead ends: 60 [2019-09-05 12:04:02,373 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=655, Invalid=1795, Unknown=0, NotChecked=0, Total=2450 [2019-09-05 12:04:02,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-05 12:04:02,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-09-05 12:04:02,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-05 12:04:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2019-09-05 12:04:02,382 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 51 [2019-09-05 12:04:02,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:04:02,382 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2019-09-05 12:04:02,383 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-05 12:04:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2019-09-05 12:04:02,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-05 12:04:02,384 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:04:02,384 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:04:02,384 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:04:02,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:04:02,385 INFO L82 PathProgramCache]: Analyzing trace with hash -123180081, now seen corresponding path program 7 times [2019-09-05 12:04:02,385 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:04:02,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:04:02,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:02,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:04:02,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:04:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:02,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:04:02,921 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:04:02,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:04:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:04:02,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-05 12:04:02,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:04:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:03,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:04:03,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 31 [2019-09-05 12:04:03,087 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-05 12:04:03,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-05 12:04:03,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=864, Unknown=0, NotChecked=0, Total=930 [2019-09-05 12:04:03,089 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 31 states. [2019-09-05 12:04:04,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:04:04,619 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2019-09-05 12:04:04,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-05 12:04:04,622 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 59 [2019-09-05 12:04:04,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:04:04,623 INFO L225 Difference]: With dead ends: 73 [2019-09-05 12:04:04,623 INFO L226 Difference]: Without dead ends: 68 [2019-09-05 12:04:04,624 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=875, Invalid=2431, Unknown=0, NotChecked=0, Total=3306 [2019-09-05 12:04:04,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-05 12:04:04,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-09-05 12:04:04,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-05 12:04:04,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2019-09-05 12:04:04,632 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 59 [2019-09-05 12:04:04,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:04:04,632 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2019-09-05 12:04:04,632 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-05 12:04:04,632 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2019-09-05 12:04:04,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-05 12:04:04,634 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:04:04,634 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:04:04,634 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:04:04,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:04:04,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1531325895, now seen corresponding path program 8 times [2019-09-05 12:04:04,634 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:04:04,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:04:04,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:04,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:04:04,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:04:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:05,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:04:05,225 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:04:05,237 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:04:05,275 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:04:05,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:04:05,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-05 12:04:05,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:04:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:05,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:04:05,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 35 [2019-09-05 12:04:05,433 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-05 12:04:05,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-05 12:04:05,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1116, Unknown=0, NotChecked=0, Total=1190 [2019-09-05 12:04:05,434 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 35 states. [2019-09-05 12:04:07,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:04:07,410 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2019-09-05 12:04:07,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-05 12:04:07,412 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2019-09-05 12:04:07,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:04:07,413 INFO L225 Difference]: With dead ends: 81 [2019-09-05 12:04:07,414 INFO L226 Difference]: Without dead ends: 76 [2019-09-05 12:04:07,415 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1127, Invalid=3163, Unknown=0, NotChecked=0, Total=4290 [2019-09-05 12:04:07,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-05 12:04:07,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-09-05 12:04:07,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-05 12:04:07,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2019-09-05 12:04:07,423 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 67 [2019-09-05 12:04:07,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:04:07,424 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2019-09-05 12:04:07,424 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-05 12:04:07,424 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2019-09-05 12:04:07,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-05 12:04:07,425 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:04:07,426 INFO L399 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:04:07,426 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:04:07,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:04:07,426 INFO L82 PathProgramCache]: Analyzing trace with hash 182351807, now seen corresponding path program 9 times [2019-09-05 12:04:07,426 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:04:07,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:04:07,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:07,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:04:07,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:04:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:08,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:04:08,300 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 12:04:08,326 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:04:08,364 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2019-09-05 12:04:08,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:04:08,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-05 12:04:08,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:04:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:08,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:04:08,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 39 [2019-09-05 12:04:08,511 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-05 12:04:08,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-05 12:04:08,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1400, Unknown=0, NotChecked=0, Total=1482 [2019-09-05 12:04:08,512 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 39 states. [2019-09-05 12:04:11,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:04:11,307 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2019-09-05 12:04:11,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-05 12:04:11,308 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 75 [2019-09-05 12:04:11,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:04:11,309 INFO L225 Difference]: With dead ends: 89 [2019-09-05 12:04:11,309 INFO L226 Difference]: Without dead ends: 84 [2019-09-05 12:04:11,311 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1411, Invalid=3991, Unknown=0, NotChecked=0, Total=5402 [2019-09-05 12:04:11,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-05 12:04:11,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-09-05 12:04:11,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-05 12:04:11,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2019-09-05 12:04:11,319 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 75 [2019-09-05 12:04:11,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:04:11,320 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2019-09-05 12:04:11,320 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-05 12:04:11,320 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2019-09-05 12:04:11,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-05 12:04:11,321 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:04:11,321 INFO L399 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:04:11,322 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:04:11,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:04:11,322 INFO L82 PathProgramCache]: Analyzing trace with hash -932623945, now seen corresponding path program 10 times [2019-09-05 12:04:11,322 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:04:11,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:04:11,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:11,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:04:11,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:04:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:12,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:04:12,110 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:04:12,123 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:04:12,166 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:04:12,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:04:12,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-05 12:04:12,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:04:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:12,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:04:12,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 43 [2019-09-05 12:04:12,353 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-05 12:04:12,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-05 12:04:12,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1716, Unknown=0, NotChecked=0, Total=1806 [2019-09-05 12:04:12,354 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 43 states. [2019-09-05 12:04:15,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:04:15,493 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2019-09-05 12:04:15,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-05 12:04:15,493 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 83 [2019-09-05 12:04:15,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:04:15,494 INFO L225 Difference]: With dead ends: 97 [2019-09-05 12:04:15,495 INFO L226 Difference]: Without dead ends: 92 [2019-09-05 12:04:15,496 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1727, Invalid=4915, Unknown=0, NotChecked=0, Total=6642 [2019-09-05 12:04:15,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-09-05 12:04:15,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-09-05 12:04:15,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-05 12:04:15,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2019-09-05 12:04:15,505 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 83 [2019-09-05 12:04:15,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:04:15,506 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2019-09-05 12:04:15,506 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-05 12:04:15,506 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2019-09-05 12:04:15,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-05 12:04:15,507 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:04:15,508 INFO L399 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:04:15,508 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:04:15,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:04:15,508 INFO L82 PathProgramCache]: Analyzing trace with hash -589388881, now seen corresponding path program 11 times [2019-09-05 12:04:15,508 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:04:15,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:04:15,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:15,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:04:15,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:04:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:16,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:04:16,460 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:04:16,470 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:04:16,573 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2019-09-05 12:04:16,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:04:16,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-05 12:04:16,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:04:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:16,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:04:16,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 47 [2019-09-05 12:04:16,760 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-05 12:04:16,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-05 12:04:16,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2064, Unknown=0, NotChecked=0, Total=2162 [2019-09-05 12:04:16,761 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 47 states. [2019-09-05 12:04:20,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:04:20,662 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2019-09-05 12:04:20,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-09-05 12:04:20,664 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 91 [2019-09-05 12:04:20,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:04:20,666 INFO L225 Difference]: With dead ends: 105 [2019-09-05 12:04:20,666 INFO L226 Difference]: Without dead ends: 100 [2019-09-05 12:04:20,669 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2075, Invalid=5935, Unknown=0, NotChecked=0, Total=8010 [2019-09-05 12:04:20,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-05 12:04:20,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-09-05 12:04:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-05 12:04:20,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2019-09-05 12:04:20,677 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 91 [2019-09-05 12:04:20,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:04:20,677 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2019-09-05 12:04:20,677 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-05 12:04:20,678 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2019-09-05 12:04:20,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-05 12:04:20,679 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:04:20,679 INFO L399 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:04:20,679 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:04:20,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:04:20,680 INFO L82 PathProgramCache]: Analyzing trace with hash 423003559, now seen corresponding path program 12 times [2019-09-05 12:04:20,680 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:04:20,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:04:20,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:20,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:04:20,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:04:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:21,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:04:21,841 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:04:21,851 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:04:21,916 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2019-09-05 12:04:21,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:04:21,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-05 12:04:21,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:04:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:22,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:04:22,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 51 [2019-09-05 12:04:22,099 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-09-05 12:04:22,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-09-05 12:04:22,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2444, Unknown=0, NotChecked=0, Total=2550 [2019-09-05 12:04:22,101 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 51 states. [2019-09-05 12:04:26,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:04:26,930 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2019-09-05 12:04:26,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-05 12:04:26,931 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 99 [2019-09-05 12:04:26,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:04:26,932 INFO L225 Difference]: With dead ends: 113 [2019-09-05 12:04:26,932 INFO L226 Difference]: Without dead ends: 108 [2019-09-05 12:04:26,935 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2455, Invalid=7051, Unknown=0, NotChecked=0, Total=9506 [2019-09-05 12:04:26,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-09-05 12:04:26,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2019-09-05 12:04:26,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-09-05 12:04:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2019-09-05 12:04:26,951 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 99 [2019-09-05 12:04:26,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:04:26,955 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2019-09-05 12:04:26,955 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-09-05 12:04:26,955 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2019-09-05 12:04:26,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-05 12:04:26,956 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:04:26,956 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:04:26,956 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:04:26,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:04:26,957 INFO L82 PathProgramCache]: Analyzing trace with hash -697765985, now seen corresponding path program 13 times [2019-09-05 12:04:26,957 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:04:26,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:04:26,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:26,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:04:26,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:04:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:28,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:04:28,320 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:04:28,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:04:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:04:28,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-05 12:04:28,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:04:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:28,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:04:28,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 55 [2019-09-05 12:04:28,709 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-09-05 12:04:28,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-09-05 12:04:28,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=2856, Unknown=0, NotChecked=0, Total=2970 [2019-09-05 12:04:28,710 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 55 states. [2019-09-05 12:04:28,903 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 8 [2019-09-05 12:04:29,126 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2019-09-05 12:04:34,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:04:34,523 INFO L93 Difference]: Finished difference Result 121 states and 124 transitions. [2019-09-05 12:04:34,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-09-05 12:04:34,529 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 107 [2019-09-05 12:04:34,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:04:34,530 INFO L225 Difference]: With dead ends: 121 [2019-09-05 12:04:34,531 INFO L226 Difference]: Without dead ends: 116 [2019-09-05 12:04:34,534 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=2867, Invalid=8263, Unknown=0, NotChecked=0, Total=11130 [2019-09-05 12:04:34,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-09-05 12:04:34,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2019-09-05 12:04:34,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-09-05 12:04:34,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2019-09-05 12:04:34,541 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 107 [2019-09-05 12:04:34,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:04:34,541 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2019-09-05 12:04:34,541 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-09-05 12:04:34,542 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2019-09-05 12:04:34,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-05 12:04:34,543 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:04:34,543 INFO L399 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:04:34,543 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:04:34,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:04:34,543 INFO L82 PathProgramCache]: Analyzing trace with hash -177348201, now seen corresponding path program 14 times [2019-09-05 12:04:34,544 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:04:34,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:04:34,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:34,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:04:34,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:04:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:36,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:04:36,053 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:04:36,073 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:04:36,225 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:04:36,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:04:36,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 55 conjunts are in the unsatisfiable core [2019-09-05 12:04:36,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:04:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:36,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:04:36,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 59 [2019-09-05 12:04:36,514 INFO L454 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-09-05 12:04:36,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-09-05 12:04:36,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=3300, Unknown=0, NotChecked=0, Total=3422 [2019-09-05 12:04:36,515 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 59 states. [2019-09-05 12:04:36,685 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 8 [2019-09-05 12:04:36,801 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 8 [2019-09-05 12:04:36,932 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2019-09-05 12:04:37,063 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-05 12:04:37,196 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-05 12:04:37,336 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-05 12:04:37,474 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-05 12:04:37,614 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-05 12:04:37,756 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-05 12:04:43,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:04:43,441 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2019-09-05 12:04:43,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-09-05 12:04:43,444 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 115 [2019-09-05 12:04:43,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:04:43,446 INFO L225 Difference]: With dead ends: 129 [2019-09-05 12:04:43,446 INFO L226 Difference]: Without dead ends: 124 [2019-09-05 12:04:43,447 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=3311, Invalid=9571, Unknown=0, NotChecked=0, Total=12882 [2019-09-05 12:04:43,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-09-05 12:04:43,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2019-09-05 12:04:43,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-09-05 12:04:43,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2019-09-05 12:04:43,454 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 115 [2019-09-05 12:04:43,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:04:43,455 INFO L475 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2019-09-05 12:04:43,455 INFO L476 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-09-05 12:04:43,455 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2019-09-05 12:04:43,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-05 12:04:43,456 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:04:43,457 INFO L399 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:04:43,457 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:04:43,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:04:43,457 INFO L82 PathProgramCache]: Analyzing trace with hash -549626993, now seen corresponding path program 15 times [2019-09-05 12:04:43,457 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:04:43,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:04:43,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:43,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:04:43,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:04:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:45,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:04:45,389 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:04:45,400 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:04:45,475 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2019-09-05 12:04:45,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:04:45,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 59 conjunts are in the unsatisfiable core [2019-09-05 12:04:45,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:04:45,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:45,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:04:45,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 63 [2019-09-05 12:04:45,698 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-05 12:04:45,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-05 12:04:45,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=3776, Unknown=0, NotChecked=0, Total=3906 [2019-09-05 12:04:45,700 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 63 states. [2019-09-05 12:04:45,884 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 8 [2019-09-05 12:04:46,016 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 8 [2019-09-05 12:04:46,169 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2019-09-05 12:04:46,316 WARN L188 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-05 12:04:46,475 WARN L188 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-05 12:04:46,627 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-05 12:04:46,784 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-05 12:04:46,944 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-05 12:04:47,097 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-05 12:04:47,255 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-05 12:04:47,417 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-05 12:04:47,578 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-05 12:04:47,905 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-05 12:04:53,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:04:53,891 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2019-09-05 12:04:53,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-05 12:04:53,892 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 123 [2019-09-05 12:04:53,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:04:53,893 INFO L225 Difference]: With dead ends: 137 [2019-09-05 12:04:53,894 INFO L226 Difference]: Without dead ends: 132 [2019-09-05 12:04:53,895 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=3787, Invalid=10975, Unknown=0, NotChecked=0, Total=14762 [2019-09-05 12:04:53,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-09-05 12:04:53,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2019-09-05 12:04:53,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-09-05 12:04:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2019-09-05 12:04:53,901 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 123 [2019-09-05 12:04:53,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:04:53,901 INFO L475 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2019-09-05 12:04:53,901 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-05 12:04:53,902 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2019-09-05 12:04:53,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-09-05 12:04:53,903 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:04:53,903 INFO L399 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:04:53,903 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:04:53,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:04:53,904 INFO L82 PathProgramCache]: Analyzing trace with hash -2066784889, now seen corresponding path program 16 times [2019-09-05 12:04:53,904 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:04:53,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:04:53,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:53,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:04:53,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:04:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:04:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:56,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:04:56,062 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:04:56,072 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:04:56,307 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:04:56,307 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:04:56,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 63 conjunts are in the unsatisfiable core [2019-09-05 12:04:56,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:04:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:04:56,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:04:56,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 67 [2019-09-05 12:04:56,699 INFO L454 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-09-05 12:04:56,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-09-05 12:04:56,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=4284, Unknown=0, NotChecked=0, Total=4422 [2019-09-05 12:04:56,700 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 67 states. [2019-09-05 12:04:56,931 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 8 [2019-09-05 12:04:57,076 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 8 [2019-09-05 12:04:57,240 WARN L188 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2019-09-05 12:04:57,397 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-05 12:04:57,564 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-05 12:04:57,736 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-05 12:04:57,901 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-05 12:04:58,070 WARN L188 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-05 12:04:58,246 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-05 12:04:58,431 WARN L188 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-05 12:04:58,608 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-05 12:04:58,786 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-05 12:04:58,965 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-05 12:04:59,141 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-05 12:04:59,319 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-05 12:04:59,495 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-05 12:05:06,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:06,369 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2019-09-05 12:05:06,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-09-05 12:05:06,369 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 131 [2019-09-05 12:05:06,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:06,371 INFO L225 Difference]: With dead ends: 145 [2019-09-05 12:05:06,371 INFO L226 Difference]: Without dead ends: 140 [2019-09-05 12:05:06,373 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=4295, Invalid=12475, Unknown=0, NotChecked=0, Total=16770 [2019-09-05 12:05:06,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-09-05 12:05:06,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2019-09-05 12:05:06,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-09-05 12:05:06,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2019-09-05 12:05:06,379 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 131 [2019-09-05 12:05:06,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:06,380 INFO L475 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2019-09-05 12:05:06,380 INFO L476 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-09-05 12:05:06,380 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2019-09-05 12:05:06,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-09-05 12:05:06,381 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:06,381 INFO L399 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:06,381 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:06,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:06,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1595664255, now seen corresponding path program 17 times [2019-09-05 12:05:06,382 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:06,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:06,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:06,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:06,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:05:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:05:08,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:05:08,745 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:05:08,758 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:05:08,991 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2019-09-05 12:05:08,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:09,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 67 conjunts are in the unsatisfiable core [2019-09-05 12:05:09,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:05:09,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:05:09,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 71 [2019-09-05 12:05:09,331 INFO L454 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-09-05 12:05:09,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-09-05 12:05:09,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=4824, Unknown=0, NotChecked=0, Total=4970 [2019-09-05 12:05:09,339 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 71 states. [2019-09-05 12:05:09,553 WARN L188 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 8 [2019-09-05 12:05:09,713 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 8 [2019-09-05 12:05:09,886 WARN L188 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2019-09-05 12:05:10,064 WARN L188 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-05 12:05:10,248 WARN L188 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-05 12:05:10,433 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-05 12:05:10,619 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-05 12:05:10,805 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-05 12:05:10,995 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-05 12:05:11,182 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-05 12:05:11,386 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-05 12:05:11,584 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-05 12:05:11,780 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-05 12:05:11,975 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-05 12:05:12,172 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-05 12:05:12,381 WARN L188 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-05 12:05:12,580 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-05 12:05:12,780 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-05 12:05:12,979 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-05 12:05:13,176 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-05 12:05:13,375 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-05 12:05:13,581 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-05 12:05:20,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:20,566 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2019-09-05 12:05:20,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-09-05 12:05:20,566 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 139 [2019-09-05 12:05:20,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:20,568 INFO L225 Difference]: With dead ends: 153 [2019-09-05 12:05:20,568 INFO L226 Difference]: Without dead ends: 148 [2019-09-05 12:05:20,569 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=4835, Invalid=14071, Unknown=0, NotChecked=0, Total=18906 [2019-09-05 12:05:20,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-09-05 12:05:20,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2019-09-05 12:05:20,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-09-05 12:05:20,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2019-09-05 12:05:20,576 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 139 [2019-09-05 12:05:20,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:20,577 INFO L475 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2019-09-05 12:05:20,577 INFO L476 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-09-05 12:05:20,577 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2019-09-05 12:05:20,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-09-05 12:05:20,578 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:20,578 INFO L399 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:20,578 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:20,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:20,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1864038775, now seen corresponding path program 18 times [2019-09-05 12:05:20,578 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:20,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:20,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:20,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:20,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:05:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:05:23,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:05:23,370 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:05:23,380 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:05:23,477 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 69 check-sat command(s) [2019-09-05 12:05:23,477 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:23,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 71 conjunts are in the unsatisfiable core [2019-09-05 12:05:23,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:05:23,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:05:23,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 75 [2019-09-05 12:05:23,782 INFO L454 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-09-05 12:05:23,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-09-05 12:05:23,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=5396, Unknown=0, NotChecked=0, Total=5550 [2019-09-05 12:05:23,783 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 75 states. [2019-09-05 12:05:24,035 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 8 [2019-09-05 12:05:24,205 WARN L188 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 8 [2019-09-05 12:05:24,395 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 9 [2019-09-05 12:05:24,590 WARN L188 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-05 12:05:24,790 WARN L188 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-05 12:05:24,994 WARN L188 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-05 12:05:25,203 WARN L188 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-05 12:05:25,415 WARN L188 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-05 12:05:25,620 WARN L188 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-05 12:05:25,830 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-05 12:05:26,039 WARN L188 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-05 12:05:26,258 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-05 12:05:26,472 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-05 12:05:26,684 WARN L188 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-05 12:05:26,891 WARN L188 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-05 12:05:27,117 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-05 12:05:27,361 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-05 12:05:27,574 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-05 12:05:27,797 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-05 12:05:28,010 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-05 12:05:28,231 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-05 12:05:28,459 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-05 12:05:28,669 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-05 12:05:28,880 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-05 12:05:29,097 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-05 12:05:29,750 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2019-09-05 12:05:36,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:36,859 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2019-09-05 12:05:36,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-09-05 12:05:36,859 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 147 [2019-09-05 12:05:36,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:36,861 INFO L225 Difference]: With dead ends: 161 [2019-09-05 12:05:36,861 INFO L226 Difference]: Without dead ends: 156 [2019-09-05 12:05:36,862 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2626 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=5407, Invalid=15763, Unknown=0, NotChecked=0, Total=21170 [2019-09-05 12:05:36,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-09-05 12:05:36,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2019-09-05 12:05:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-09-05 12:05:36,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2019-09-05 12:05:36,870 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 147 [2019-09-05 12:05:36,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:36,871 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2019-09-05 12:05:36,871 INFO L476 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-09-05 12:05:36,871 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2019-09-05 12:05:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-09-05 12:05:36,872 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:36,872 INFO L399 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:36,872 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:36,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:36,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1036292975, now seen corresponding path program 19 times [2019-09-05 12:05:36,873 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:36,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:36,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:36,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:36,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:05:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:05:39,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:05:39,668 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:05:39,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:05:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:05:40,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 75 conjunts are in the unsatisfiable core [2019-09-05 12:05:40,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:05:40,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:05:40,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 79 [2019-09-05 12:05:40,524 INFO L454 AbstractCegarLoop]: Interpolant automaton has 79 states [2019-09-05 12:05:40,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2019-09-05 12:05:40,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=6000, Unknown=0, NotChecked=0, Total=6162 [2019-09-05 12:05:40,524 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 79 states. [2019-09-05 12:05:40,780 WARN L188 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 8 [2019-09-05 12:05:40,965 WARN L188 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 8 [2019-09-05 12:05:41,177 WARN L188 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2019-09-05 12:05:41,386 WARN L188 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-05 12:05:41,602 WARN L188 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-05 12:05:41,813 WARN L188 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-05 12:05:42,039 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-05 12:05:42,262 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-05 12:05:42,483 WARN L188 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-05 12:05:42,708 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-05 12:05:42,934 WARN L188 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-05 12:05:43,172 WARN L188 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-05 12:05:43,405 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-05 12:05:43,635 WARN L188 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-05 12:05:43,873 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-05 12:05:44,111 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-05 12:05:44,347 WARN L188 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-05 12:05:44,595 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-05 12:05:44,833 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-05 12:05:45,072 WARN L188 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-05 12:05:45,321 WARN L188 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-05 12:05:45,565 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-05 12:05:45,810 WARN L188 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-05 12:05:46,063 WARN L188 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-05 12:05:46,308 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-05 12:05:46,544 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-05 12:05:46,778 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-05 12:05:47,017 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-05 12:05:55,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:55,535 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2019-09-05 12:05:55,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-09-05 12:05:55,536 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 155 [2019-09-05 12:05:55,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:55,537 INFO L225 Difference]: With dead ends: 169 [2019-09-05 12:05:55,537 INFO L226 Difference]: Without dead ends: 164 [2019-09-05 12:05:55,539 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2924 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=6011, Invalid=17551, Unknown=0, NotChecked=0, Total=23562 [2019-09-05 12:05:55,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-09-05 12:05:55,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2019-09-05 12:05:55,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-09-05 12:05:55,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2019-09-05 12:05:55,545 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 155 [2019-09-05 12:05:55,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:55,545 INFO L475 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2019-09-05 12:05:55,546 INFO L476 AbstractCegarLoop]: Interpolant automaton has 79 states. [2019-09-05 12:05:55,546 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2019-09-05 12:05:55,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-05 12:05:55,546 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:55,547 INFO L399 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:55,547 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:55,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:55,547 INFO L82 PathProgramCache]: Analyzing trace with hash -602884761, now seen corresponding path program 20 times [2019-09-05 12:05:55,547 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:55,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:55,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:55,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:05:55,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:05:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:05:58,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:05:58,698 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:05:58,709 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:05:59,129 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:05:59,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:59,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 79 conjunts are in the unsatisfiable core [2019-09-05 12:05:59,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:05:59,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:05:59,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 83 [2019-09-05 12:05:59,654 INFO L454 AbstractCegarLoop]: Interpolant automaton has 83 states [2019-09-05 12:05:59,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2019-09-05 12:05:59,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=6636, Unknown=0, NotChecked=0, Total=6806 [2019-09-05 12:05:59,655 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 83 states. [2019-09-05 12:05:59,937 WARN L188 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 8 [2019-09-05 12:06:00,143 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 8 [2019-09-05 12:06:00,376 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 9 [2019-09-05 12:06:00,610 WARN L188 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-05 12:06:00,844 WARN L188 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-05 12:06:01,080 WARN L188 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-05 12:06:01,321 WARN L188 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-05 12:06:01,565 WARN L188 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-05 12:06:01,816 WARN L188 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-05 12:06:02,062 WARN L188 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-05 12:06:02,308 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-05 12:06:02,564 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-05 12:06:02,815 WARN L188 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-05 12:06:03,065 WARN L188 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-05 12:06:03,317 WARN L188 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-05 12:06:03,582 WARN L188 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-05 12:06:03,833 WARN L188 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-05 12:06:04,106 WARN L188 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-05 12:06:04,366 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-05 12:06:04,622 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-05 12:06:04,884 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-05 12:06:05,140 WARN L188 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-05 12:06:05,396 WARN L188 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-05 12:06:05,687 WARN L188 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-05 12:06:05,963 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-05 12:06:06,222 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-05 12:06:06,481 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-05 12:06:06,745 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-05 12:06:07,015 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-05 12:06:07,262 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-05 12:06:07,517 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-05 12:06:07,767 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-05 12:06:16,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:06:16,896 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2019-09-05 12:06:16,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-09-05 12:06:16,898 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 163 [2019-09-05 12:06:16,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:06:16,900 INFO L225 Difference]: With dead ends: 177 [2019-09-05 12:06:16,900 INFO L226 Difference]: Without dead ends: 172 [2019-09-05 12:06:16,901 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3238 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=6647, Invalid=19435, Unknown=0, NotChecked=0, Total=26082 [2019-09-05 12:06:16,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-09-05 12:06:16,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2019-09-05 12:06:16,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-09-05 12:06:16,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2019-09-05 12:06:16,909 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 163 [2019-09-05 12:06:16,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:06:16,909 INFO L475 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2019-09-05 12:06:16,909 INFO L476 AbstractCegarLoop]: Interpolant automaton has 83 states. [2019-09-05 12:06:16,909 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2019-09-05 12:06:16,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-09-05 12:06:16,910 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:06:16,910 INFO L399 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:06:16,911 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:06:16,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:06:16,911 INFO L82 PathProgramCache]: Analyzing trace with hash -487104673, now seen corresponding path program 21 times [2019-09-05 12:06:16,911 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:06:16,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:06:16,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:16,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:06:16,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:06:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:06:20,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:06:20,326 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:06:20,335 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:06:20,449 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2019-09-05 12:06:20,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:06:20,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 83 conjunts are in the unsatisfiable core [2019-09-05 12:06:20,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:06:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:06:20,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:06:20,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 87 [2019-09-05 12:06:20,737 INFO L454 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-09-05 12:06:20,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-09-05 12:06:20,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=7304, Unknown=0, NotChecked=0, Total=7482 [2019-09-05 12:06:20,738 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 87 states. [2019-09-05 12:06:21,033 WARN L188 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 8 [2019-09-05 12:06:21,265 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 8 [2019-09-05 12:06:21,507 WARN L188 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 9 [2019-09-05 12:06:21,755 WARN L188 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-05 12:06:22,013 WARN L188 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-05 12:06:22,270 WARN L188 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-05 12:06:22,528 WARN L188 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-05 12:06:22,796 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-05 12:06:23,064 WARN L188 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-05 12:06:23,328 WARN L188 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-05 12:06:23,591 WARN L188 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-05 12:06:23,866 WARN L188 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-05 12:06:24,135 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-05 12:06:24,412 WARN L188 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-05 12:06:24,685 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-05 12:06:24,965 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-05 12:06:25,240 WARN L188 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-05 12:06:25,518 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-05 12:06:25,799 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-05 12:06:26,083 WARN L188 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-05 12:06:26,370 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-05 12:06:26,657 WARN L188 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-05 12:06:26,942 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-05 12:06:27,225 WARN L188 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-05 12:06:27,512 WARN L188 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-05 12:06:27,793 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-05 12:06:28,075 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-05 12:06:28,360 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-05 12:06:28,651 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-05 12:06:28,939 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-05 12:06:29,215 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-05 12:06:29,487 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-05 12:06:29,765 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-05 12:06:30,035 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-05 12:06:30,306 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-05 12:06:30,569 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-05 12:06:40,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:06:40,044 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2019-09-05 12:06:40,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-09-05 12:06:40,044 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 171 [2019-09-05 12:06:40,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:06:40,046 INFO L225 Difference]: With dead ends: 185 [2019-09-05 12:06:40,046 INFO L226 Difference]: Without dead ends: 180 [2019-09-05 12:06:40,047 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3568 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=7315, Invalid=21415, Unknown=0, NotChecked=0, Total=28730 [2019-09-05 12:06:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-09-05 12:06:40,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2019-09-05 12:06:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-09-05 12:06:40,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2019-09-05 12:06:40,054 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 171 [2019-09-05 12:06:40,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:06:40,055 INFO L475 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2019-09-05 12:06:40,055 INFO L476 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-09-05 12:06:40,055 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2019-09-05 12:06:40,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-09-05 12:06:40,056 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:06:40,056 INFO L399 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:06:40,056 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:06:40,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:06:40,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1936757079, now seen corresponding path program 22 times [2019-09-05 12:06:40,057 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:06:40,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:06:40,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:40,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:06:40,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:06:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:06:43,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:06:43,966 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 12:06:43,981 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:06:44,265 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:06:44,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:06:44,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 87 conjunts are in the unsatisfiable core [2019-09-05 12:06:44,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:06:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:06:44,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:06:44,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 91 [2019-09-05 12:06:44,723 INFO L454 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-09-05 12:06:44,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-09-05 12:06:44,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=8004, Unknown=0, NotChecked=0, Total=8190 [2019-09-05 12:06:44,724 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand 91 states. [2019-09-05 12:06:45,032 WARN L188 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 8 [2019-09-05 12:06:45,270 WARN L188 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 8 [2019-09-05 12:06:45,527 WARN L188 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 9 [2019-09-05 12:06:45,790 WARN L188 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-05 12:06:46,069 WARN L188 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-05 12:06:46,343 WARN L188 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-05 12:06:46,618 WARN L188 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-05 12:06:46,905 WARN L188 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-05 12:06:47,190 WARN L188 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-05 12:06:47,486 WARN L188 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-05 12:06:47,773 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-05 12:06:48,070 WARN L188 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-05 12:06:48,365 WARN L188 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-05 12:06:48,665 WARN L188 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-05 12:06:48,958 WARN L188 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-05 12:06:49,255 WARN L188 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-05 12:06:49,558 WARN L188 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-05 12:06:49,854 WARN L188 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-05 12:06:50,156 WARN L188 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-05 12:06:50,462 WARN L188 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-05 12:06:50,769 WARN L188 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-05 12:06:51,073 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-05 12:06:51,376 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-05 12:06:51,682 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-05 12:06:52,005 WARN L188 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-05 12:06:52,308 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-05 12:06:52,615 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-05 12:06:52,939 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-05 12:06:53,246 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-05 12:06:53,558 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-05 12:06:53,864 WARN L188 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-05 12:06:54,161 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-05 12:06:54,459 WARN L188 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-05 12:06:54,758 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-05 12:06:55,073 WARN L188 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-05 12:06:55,372 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-05 12:06:55,661 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-05 12:06:55,946 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-05 12:06:56,228 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-05 12:07:06,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:07:06,647 INFO L93 Difference]: Finished difference Result 193 states and 196 transitions. [2019-09-05 12:07:06,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-09-05 12:07:06,647 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 179 [2019-09-05 12:07:06,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:07:06,649 INFO L225 Difference]: With dead ends: 193 [2019-09-05 12:07:06,649 INFO L226 Difference]: Without dead ends: 188 [2019-09-05 12:07:06,650 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3914 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=8015, Invalid=23491, Unknown=0, NotChecked=0, Total=31506 [2019-09-05 12:07:06,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-09-05 12:07:06,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2019-09-05 12:07:06,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-09-05 12:07:06,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2019-09-05 12:07:06,658 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 179 [2019-09-05 12:07:06,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:07:06,658 INFO L475 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2019-09-05 12:07:06,658 INFO L476 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-09-05 12:07:06,658 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2019-09-05 12:07:06,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-09-05 12:07:06,659 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:07:06,660 INFO L399 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:07:06,660 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:07:06,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:07:06,660 INFO L82 PathProgramCache]: Analyzing trace with hash 913591119, now seen corresponding path program 23 times [2019-09-05 12:07:06,660 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:07:06,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:07:06,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:06,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:07:06,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:07:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:07:11,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:07:11,178 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:07:11,188 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:07:11,717 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 89 check-sat command(s) [2019-09-05 12:07:11,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:07:11,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 91 conjunts are in the unsatisfiable core [2019-09-05 12:07:11,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:07:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:07:12,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:07:12,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 95 [2019-09-05 12:07:12,293 INFO L454 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-09-05 12:07:12,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-09-05 12:07:12,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=8736, Unknown=0, NotChecked=0, Total=8930 [2019-09-05 12:07:12,294 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 95 states. [2019-09-05 12:07:12,690 WARN L188 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 8 [2019-09-05 12:07:12,954 WARN L188 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 8 [2019-09-05 12:07:13,241 WARN L188 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 9 [2019-09-05 12:07:13,529 WARN L188 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-05 12:07:13,822 WARN L188 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-05 12:07:14,126 WARN L188 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-05 12:07:14,431 WARN L188 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-05 12:07:14,744 WARN L188 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-05 12:07:15,045 WARN L188 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-05 12:07:15,351 WARN L188 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-05 12:07:15,674 WARN L188 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-05 12:07:15,985 WARN L188 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-05 12:07:16,300 WARN L188 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-05 12:07:16,608 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-05 12:07:16,918 WARN L188 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-05 12:07:17,246 WARN L188 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-05 12:07:17,564 WARN L188 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-05 12:07:17,888 WARN L188 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-05 12:07:18,209 WARN L188 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-05 12:07:18,543 WARN L188 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-05 12:07:18,871 WARN L188 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-05 12:07:19,201 WARN L188 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-05 12:07:19,535 WARN L188 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-05 12:07:19,860 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-05 12:07:20,186 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-05 12:07:20,512 WARN L188 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-05 12:07:20,850 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-05 12:07:21,193 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-05 12:07:21,522 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-05 12:07:21,844 WARN L188 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-05 12:07:22,176 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-05 12:07:22,506 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-05 12:07:22,836 WARN L188 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-05 12:07:23,172 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-05 12:07:23,490 WARN L188 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-05 12:07:23,806 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-05 12:07:24,129 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-05 12:07:24,454 WARN L188 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-05 12:07:24,774 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-05 12:07:25,094 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-05 12:07:25,400 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-05 12:07:25,711 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-05 12:07:26,017 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-05 12:07:26,327 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-05 12:07:26,635 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-05 12:07:37,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:07:37,085 INFO L93 Difference]: Finished difference Result 201 states and 204 transitions. [2019-09-05 12:07:37,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-09-05 12:07:37,086 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 187 [2019-09-05 12:07:37,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:07:37,087 INFO L225 Difference]: With dead ends: 201 [2019-09-05 12:07:37,087 INFO L226 Difference]: Without dead ends: 196 [2019-09-05 12:07:37,089 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4276 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=8747, Invalid=25663, Unknown=0, NotChecked=0, Total=34410 [2019-09-05 12:07:37,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-09-05 12:07:37,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2019-09-05 12:07:37,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-09-05 12:07:37,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2019-09-05 12:07:37,096 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 187 [2019-09-05 12:07:37,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:07:37,097 INFO L475 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2019-09-05 12:07:37,097 INFO L476 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-09-05 12:07:37,097 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2019-09-05 12:07:37,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-09-05 12:07:37,098 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:07:37,098 INFO L399 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:07:37,098 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:07:37,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:07:37,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1559924039, now seen corresponding path program 24 times [2019-09-05 12:07:37,098 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:07:37,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:07:37,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:37,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:07:37,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:07:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:07:42,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:07:42,610 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:07:42,621 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:07:42,758 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 93 check-sat command(s) [2019-09-05 12:07:42,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:07:42,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 95 conjunts are in the unsatisfiable core [2019-09-05 12:07:42,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:07:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:07:43,134 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:07:43,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 99 [2019-09-05 12:07:43,135 INFO L454 AbstractCegarLoop]: Interpolant automaton has 99 states [2019-09-05 12:07:43,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2019-09-05 12:07:43,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=9500, Unknown=0, NotChecked=0, Total=9702 [2019-09-05 12:07:43,135 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 99 states. [2019-09-05 12:07:43,503 WARN L188 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 8 [2019-09-05 12:07:43,782 WARN L188 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 8 [2019-09-05 12:07:44,092 WARN L188 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 9 [2019-09-05 12:07:44,394 WARN L188 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-05 12:07:44,704 WARN L188 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-05 12:07:45,024 WARN L188 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-05 12:07:45,344 WARN L188 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-05 12:07:45,679 WARN L188 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-05 12:07:46,002 WARN L188 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-05 12:07:46,337 WARN L188 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-05 12:07:46,675 WARN L188 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-05 12:07:47,021 WARN L188 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-05 12:07:47,352 WARN L188 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-05 12:07:47,687 WARN L188 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-05 12:07:48,034 WARN L188 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-05 12:07:48,399 WARN L188 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-05 12:07:48,738 WARN L188 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-05 12:07:49,088 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-05 12:07:49,438 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-05 12:07:49,789 WARN L188 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-05 12:07:50,157 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-05 12:07:50,510 WARN L188 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-05 12:07:50,859 WARN L188 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-05 12:07:51,213 WARN L188 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-05 12:07:51,579 WARN L188 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-05 12:07:51,943 WARN L188 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-05 12:07:52,322 WARN L188 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-05 12:07:52,676 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-05 12:07:53,037 WARN L188 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-05 12:07:53,395 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-05 12:07:53,749 WARN L188 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-05 12:07:54,111 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-05 12:07:54,483 WARN L188 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-05 12:07:54,831 WARN L188 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-05 12:07:55,197 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-05 12:07:55,545 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-05 12:07:55,892 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-05 12:07:56,234 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-05 12:07:56,584 WARN L188 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-05 12:07:56,926 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-05 12:07:57,272 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-05 12:07:57,610 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-05 12:07:57,956 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-05 12:07:58,298 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-05 12:07:58,644 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-05 12:07:59,000 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-05 12:07:59,343 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-05 12:07:59,683 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-05 12:08:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:10,888 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2019-09-05 12:08:10,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-09-05 12:08:10,889 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 195 [2019-09-05 12:08:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:10,890 INFO L225 Difference]: With dead ends: 209 [2019-09-05 12:08:10,890 INFO L226 Difference]: Without dead ends: 204 [2019-09-05 12:08:10,891 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4654 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=9511, Invalid=27931, Unknown=0, NotChecked=0, Total=37442 [2019-09-05 12:08:10,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-09-05 12:08:10,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2019-09-05 12:08:10,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-09-05 12:08:10,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 204 transitions. [2019-09-05 12:08:10,899 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 204 transitions. Word has length 195 [2019-09-05 12:08:10,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:10,899 INFO L475 AbstractCegarLoop]: Abstraction has 204 states and 204 transitions. [2019-09-05 12:08:10,899 INFO L476 AbstractCegarLoop]: Interpolant automaton has 99 states. [2019-09-05 12:08:10,900 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 204 transitions. [2019-09-05 12:08:10,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-09-05 12:08:10,901 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:10,901 INFO L399 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:10,901 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:10,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:10,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1610918081, now seen corresponding path program 25 times [2019-09-05 12:08:10,901 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:10,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:10,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:10,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:10,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:08:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:15,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:08:15,968 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:08:15,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:08:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:08:17,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 99 conjunts are in the unsatisfiable core [2019-09-05 12:08:17,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:17,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:08:17,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 103 [2019-09-05 12:08:17,922 INFO L454 AbstractCegarLoop]: Interpolant automaton has 103 states [2019-09-05 12:08:17,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2019-09-05 12:08:17,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=10296, Unknown=0, NotChecked=0, Total=10506 [2019-09-05 12:08:17,922 INFO L87 Difference]: Start difference. First operand 204 states and 204 transitions. Second operand 103 states. [2019-09-05 12:08:18,318 WARN L188 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 8 [2019-09-05 12:08:18,622 WARN L188 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 8 [2019-09-05 12:08:18,963 WARN L188 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 9 [2019-09-05 12:08:19,288 WARN L188 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-05 12:08:19,618 WARN L188 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-05 12:08:19,957 WARN L188 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-05 12:08:20,313 WARN L188 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-05 12:08:20,668 WARN L188 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-05 12:08:21,019 WARN L188 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-05 12:08:21,374 WARN L188 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-05 12:08:21,744 WARN L188 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-05 12:08:22,099 WARN L188 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-05 12:08:22,453 WARN L188 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-05 12:08:22,818 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-05 12:08:23,183 WARN L188 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-05 12:08:23,568 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-05 12:08:23,935 WARN L188 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-05 12:08:24,307 WARN L188 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-05 12:08:24,672 WARN L188 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-05 12:08:25,069 WARN L188 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-05 12:08:25,442 WARN L188 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-05 12:08:25,824 WARN L188 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-05 12:08:26,197 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-05 12:08:26,586 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-05 12:08:26,976 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-05 12:08:27,357 WARN L188 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-05 12:08:27,743 WARN L188 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-05 12:08:28,119 WARN L188 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-05 12:08:28,505 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-05 12:08:28,889 WARN L188 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-05 12:08:29,267 WARN L188 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-05 12:08:29,647 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-05 12:08:30,035 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-05 12:08:30,408 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-05 12:08:30,780 WARN L188 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-05 12:08:31,151 WARN L188 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-05 12:08:31,530 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-05 12:08:31,899 WARN L188 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-05 12:08:32,277 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-05 12:08:32,650 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-05 12:08:33,017 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-05 12:08:33,400 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-05 12:08:33,769 WARN L188 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-05 12:08:34,146 WARN L188 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-05 12:08:34,516 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-05 12:08:34,906 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-05 12:08:35,294 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-05 12:08:35,668 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-05 12:08:36,034 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-05 12:08:36,388 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-05 12:08:36,738 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-05 12:08:37,081 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-05 12:08:37,783 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-05 12:08:48,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:48,843 INFO L93 Difference]: Finished difference Result 217 states and 220 transitions. [2019-09-05 12:08:48,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2019-09-05 12:08:48,843 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 203 [2019-09-05 12:08:48,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:48,844 INFO L225 Difference]: With dead ends: 217 [2019-09-05 12:08:48,845 INFO L226 Difference]: Without dead ends: 212 [2019-09-05 12:08:48,846 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5048 ImplicationChecksByTransitivity, 34.9s TimeCoverageRelationStatistics Valid=10307, Invalid=30295, Unknown=0, NotChecked=0, Total=40602 [2019-09-05 12:08:48,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-09-05 12:08:48,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2019-09-05 12:08:48,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-09-05 12:08:48,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2019-09-05 12:08:48,854 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 203 [2019-09-05 12:08:48,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:48,855 INFO L475 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2019-09-05 12:08:48,855 INFO L476 AbstractCegarLoop]: Interpolant automaton has 103 states. [2019-09-05 12:08:48,855 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2019-09-05 12:08:48,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-09-05 12:08:48,856 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:48,856 INFO L399 BasicCegarLoop]: trace histogram [100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:48,857 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:48,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:48,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1080994103, now seen corresponding path program 26 times [2019-09-05 12:08:48,857 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:48,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:48,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:48,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:08:48,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:08:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 10000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:54,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:08:54,514 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:08:54,536 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:08:55,409 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:08:55,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:55,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 103 conjunts are in the unsatisfiable core [2019-09-05 12:08:55,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 10000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:56,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:08:56,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 107 [2019-09-05 12:08:56,343 INFO L454 AbstractCegarLoop]: Interpolant automaton has 107 states [2019-09-05 12:08:56,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2019-09-05 12:08:56,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=11124, Unknown=0, NotChecked=0, Total=11342 [2019-09-05 12:08:56,344 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 107 states. [2019-09-05 12:08:56,764 WARN L188 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 8 [2019-09-05 12:08:57,104 WARN L188 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 8 [2019-09-05 12:08:57,452 WARN L188 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 9 [2019-09-05 12:08:57,797 WARN L188 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-05 12:08:58,158 WARN L188 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-05 12:08:58,526 WARN L188 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-05 12:08:58,887 WARN L188 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-05 12:08:59,257 WARN L188 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-05 12:08:59,653 WARN L188 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-05 12:09:00,032 WARN L188 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-05 12:09:00,414 WARN L188 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-05 12:09:00,801 WARN L188 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-05 12:09:01,193 WARN L188 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-05 12:09:01,583 WARN L188 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-05 12:09:01,971 WARN L188 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-05 12:09:02,374 WARN L188 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-05 12:09:02,783 WARN L188 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-05 12:09:03,180 WARN L188 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-05 12:09:03,585 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-05 12:09:03,995 WARN L188 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-05 12:09:04,417 WARN L188 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-05 12:09:04,811 WARN L188 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-05 12:09:05,218 WARN L188 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-05 12:09:05,636 WARN L188 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-05 12:09:06,050 WARN L188 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-05 12:09:06,476 WARN L188 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-05 12:09:06,884 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-05 12:09:07,276 WARN L188 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-05 12:09:07,678 WARN L188 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-05 12:09:08,083 WARN L188 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-05 12:09:08,610 WARN L188 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-05 12:09:09,023 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-05 12:09:09,426 WARN L188 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-05 12:09:09,833 WARN L188 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-05 12:09:10,231 WARN L188 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-05 12:09:10,643 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-05 12:09:11,037 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-05 12:09:11,436 WARN L188 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-05 12:09:11,827 WARN L188 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-05 12:09:12,223 WARN L188 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-05 12:09:12,619 WARN L188 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-05 12:09:13,023 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-05 12:09:13,422 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-05 12:09:13,828 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-05 12:09:14,228 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-05 12:09:14,631 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-05 12:09:15,046 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-05 12:09:15,453 WARN L188 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-05 12:09:15,857 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-05 12:09:16,248 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-05 12:09:16,637 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-05 12:09:17,021 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-05 12:09:17,408 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-05 12:09:17,776 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-05 12:09:18,148 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-05 12:09:18,520 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-05 12:09:30,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:30,787 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2019-09-05 12:09:30,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2019-09-05 12:09:30,787 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 211 [2019-09-05 12:09:30,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:30,790 INFO L225 Difference]: With dead ends: 225 [2019-09-05 12:09:30,790 INFO L226 Difference]: Without dead ends: 220 [2019-09-05 12:09:30,792 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5458 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=11135, Invalid=32755, Unknown=0, NotChecked=0, Total=43890 [2019-09-05 12:09:30,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-09-05 12:09:30,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2019-09-05 12:09:30,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-09-05 12:09:30,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2019-09-05 12:09:30,800 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 211 [2019-09-05 12:09:30,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:30,801 INFO L475 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2019-09-05 12:09:30,801 INFO L476 AbstractCegarLoop]: Interpolant automaton has 107 states. [2019-09-05 12:09:30,801 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2019-09-05 12:09:30,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-09-05 12:09:30,802 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:30,803 INFO L399 BasicCegarLoop]: trace histogram [104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:30,803 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:30,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:30,803 INFO L82 PathProgramCache]: Analyzing trace with hash 122454831, now seen corresponding path program 27 times [2019-09-05 12:09:30,803 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:30,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:30,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:30,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:09:30,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:09:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:09:36,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:09:36,855 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:09:36,867 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:09:37,037 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 105 check-sat command(s) [2019-09-05 12:09:37,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:09:37,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 107 conjunts are in the unsatisfiable core [2019-09-05 12:09:37,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:09:37,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:09:37,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 111 [2019-09-05 12:09:37,411 INFO L454 AbstractCegarLoop]: Interpolant automaton has 111 states [2019-09-05 12:09:37,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2019-09-05 12:09:37,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=11984, Unknown=0, NotChecked=0, Total=12210 [2019-09-05 12:09:37,412 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 111 states. [2019-09-05 12:09:37,847 WARN L188 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 8 [2019-09-05 12:09:38,209 WARN L188 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 8 [2019-09-05 12:09:38,577 WARN L188 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 9 [2019-09-05 12:09:38,943 WARN L188 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-05 12:09:39,327 WARN L188 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-05 12:09:39,721 WARN L188 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-05 12:09:40,103 WARN L188 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-05 12:09:40,498 WARN L188 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-05 12:09:40,894 WARN L188 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-05 12:09:41,315 WARN L188 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-05 12:09:41,715 WARN L188 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-05 12:09:42,122 WARN L188 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-05 12:09:42,527 WARN L188 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-05 12:09:42,935 WARN L188 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-05 12:09:43,365 WARN L188 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-05 12:09:43,778 WARN L188 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-05 12:09:44,193 WARN L188 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-05 12:09:44,612 WARN L188 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-05 12:09:45,041 WARN L188 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-05 12:09:45,480 WARN L188 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-05 12:09:45,909 WARN L188 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-05 12:09:46,342 WARN L188 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-05 12:09:46,773 WARN L188 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-05 12:09:47,219 WARN L188 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-05 12:09:47,677 WARN L188 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-05 12:09:48,112 WARN L188 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-05 12:09:48,552 WARN L188 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-05 12:09:49,022 WARN L188 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-05 12:09:49,450 WARN L188 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-05 12:09:49,885 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-05 12:09:50,336 WARN L188 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-05 12:09:50,771 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-05 12:09:51,213 WARN L188 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-05 12:09:51,663 WARN L188 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-05 12:09:52,114 WARN L188 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-05 12:09:52,554 WARN L188 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-05 12:09:52,992 WARN L188 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-05 12:09:53,425 WARN L188 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-05 12:09:53,862 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-05 12:09:54,281 WARN L188 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-05 12:09:54,701 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-05 12:09:55,113 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-05 12:09:55,545 WARN L188 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-05 12:09:55,980 WARN L188 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-05 12:09:56,414 WARN L188 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-05 12:09:56,851 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-05 12:09:57,284 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-05 12:09:57,733 WARN L188 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-05 12:09:58,165 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-05 12:09:58,593 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-05 12:09:59,028 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-05 12:09:59,469 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-05 12:09:59,892 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-05 12:10:00,308 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-05 12:10:00,731 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-05 12:10:01,139 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-05 12:10:01,570 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-05 12:10:01,974 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-05 12:10:02,363 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-05 12:10:02,754 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-05 12:10:03,140 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-05 12:10:15,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:10:15,597 INFO L93 Difference]: Finished difference Result 233 states and 236 transitions. [2019-09-05 12:10:15,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2019-09-05 12:10:15,597 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 219 [2019-09-05 12:10:15,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:10:15,598 INFO L225 Difference]: With dead ends: 233 [2019-09-05 12:10:15,598 INFO L226 Difference]: Without dead ends: 228 [2019-09-05 12:10:15,600 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5884 ImplicationChecksByTransitivity, 43.0s TimeCoverageRelationStatistics Valid=11995, Invalid=35311, Unknown=0, NotChecked=0, Total=47306 [2019-09-05 12:10:15,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2019-09-05 12:10:15,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2019-09-05 12:10:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2019-09-05 12:10:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2019-09-05 12:10:15,609 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 219 [2019-09-05 12:10:15,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:10:15,609 INFO L475 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2019-09-05 12:10:15,609 INFO L476 AbstractCegarLoop]: Interpolant automaton has 111 states. [2019-09-05 12:10:15,609 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2019-09-05 12:10:15,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-09-05 12:10:15,611 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:10:15,611 INFO L399 BasicCegarLoop]: trace histogram [108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:10:15,611 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:10:15,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:10:15,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1166861607, now seen corresponding path program 28 times [2019-09-05 12:10:15,612 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:10:15,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:10:15,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:15,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:10:15,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:10:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 0 proven. 11664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:10:21,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:10:21,804 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:10:21,813 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:10:22,989 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:10:22,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:10:23,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 111 conjunts are in the unsatisfiable core [2019-09-05 12:10:23,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:10:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 0 proven. 11664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:10:24,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:10:24,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 115 [2019-09-05 12:10:24,272 INFO L454 AbstractCegarLoop]: Interpolant automaton has 115 states [2019-09-05 12:10:24,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2019-09-05 12:10:24,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=12876, Unknown=0, NotChecked=0, Total=13110 [2019-09-05 12:10:24,273 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 115 states. [2019-09-05 12:10:24,784 WARN L188 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 8 [2019-09-05 12:10:25,152 WARN L188 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 8 [2019-09-05 12:10:25,543 WARN L188 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 9 [2019-09-05 12:10:25,943 WARN L188 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 11 [2019-09-05 12:10:26,355 WARN L188 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 11 [2019-09-05 12:10:26,760 WARN L188 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 11 [2019-09-05 12:10:27,199 WARN L188 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 11 [2019-09-05 12:10:27,612 WARN L188 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-05 12:10:28,027 WARN L188 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-05 12:10:28,454 WARN L188 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-05 12:10:28,907 WARN L188 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-05 12:10:29,334 WARN L188 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-05 12:10:29,773 WARN L188 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-05 12:10:30,217 WARN L188 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-05 12:10:30,650 WARN L188 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-05 12:10:31,098 WARN L188 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-05 12:10:31,576 WARN L188 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-05 12:10:32,029 WARN L188 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-05 12:10:32,471 WARN L188 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-05 12:10:32,928 WARN L188 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-05 12:10:33,383 WARN L188 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-05 12:10:33,841 WARN L188 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-05 12:10:34,319 WARN L188 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-05 12:10:34,778 WARN L188 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-05 12:10:35,246 WARN L188 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-05 12:10:35,714 WARN L188 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-05 12:10:36,201 WARN L188 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-05 12:10:36,666 WARN L188 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-05 12:10:37,130 WARN L188 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-05 12:10:37,600 WARN L188 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-05 12:10:38,075 WARN L188 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-05 12:10:38,537 WARN L188 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-05 12:10:38,990 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-05 12:10:39,451 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-05 12:10:39,920 WARN L188 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-05 12:10:40,378 WARN L188 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-05 12:10:40,860 WARN L188 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-05 12:10:41,337 WARN L188 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-05 12:10:41,813 WARN L188 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-05 12:10:42,279 WARN L188 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-05 12:10:42,739 WARN L188 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-05 12:10:43,186 WARN L188 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-05 12:10:43,647 WARN L188 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-05 12:10:44,119 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-05 12:10:44,579 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-05 12:10:45,059 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-05 12:10:45,520 WARN L188 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-05 12:10:45,970 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-05 12:10:46,422 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-05 12:10:46,885 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-05 12:10:47,336 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-05 12:10:47,790 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-05 12:10:48,254 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-05 12:10:48,720 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-05 12:10:49,188 WARN L188 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-05 12:10:49,633 WARN L188 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-05 12:10:50,082 WARN L188 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-05 12:10:50,520 WARN L188 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-05 12:10:50,955 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-05 12:10:51,393 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-05 12:10:51,821 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-05 12:10:52,242 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-05 12:10:52,679 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-05 12:10:53,101 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-05 12:10:53,519 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-05 12:10:53,956 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-05 12:10:54,369 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2019-09-05 12:11:06,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:06,499 INFO L93 Difference]: Finished difference Result 241 states and 244 transitions. [2019-09-05 12:11:06,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2019-09-05 12:11:06,501 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 227 [2019-09-05 12:11:06,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:06,502 INFO L225 Difference]: With dead ends: 241 [2019-09-05 12:11:06,502 INFO L226 Difference]: Without dead ends: 236 [2019-09-05 12:11:06,504 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 47.0s TimeCoverageRelationStatistics Valid=12887, Invalid=37963, Unknown=0, NotChecked=0, Total=50850 [2019-09-05 12:11:06,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-09-05 12:11:06,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2019-09-05 12:11:06,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2019-09-05 12:11:06,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2019-09-05 12:11:06,513 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 227 [2019-09-05 12:11:06,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:06,513 INFO L475 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2019-09-05 12:11:06,513 INFO L476 AbstractCegarLoop]: Interpolant automaton has 115 states. [2019-09-05 12:11:06,513 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2019-09-05 12:11:06,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-09-05 12:11:06,515 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:06,515 INFO L399 BasicCegarLoop]: trace histogram [112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:06,515 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:06,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:06,516 INFO L82 PathProgramCache]: Analyzing trace with hash -735588577, now seen corresponding path program 29 times [2019-09-05 12:11:06,516 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:06,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:06,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:06,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:06,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:11:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 0 proven. 12544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:13,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:11:13,496 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:11:13,505 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:11:14,491 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 113 check-sat command(s) [2019-09-05 12:11:14,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:14,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 115 conjunts are in the unsatisfiable core [2019-09-05 12:11:14,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 0 proven. 12544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:15,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:11:15,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 119 [2019-09-05 12:11:15,005 INFO L454 AbstractCegarLoop]: Interpolant automaton has 119 states [2019-09-05 12:11:15,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2019-09-05 12:11:15,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=13800, Unknown=0, NotChecked=0, Total=14042 [2019-09-05 12:11:15,006 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 119 states. [2019-09-05 12:11:15,517 WARN L188 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 8 [2019-09-05 12:11:15,906 WARN L188 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 8 [2019-09-05 12:11:16,317 WARN L188 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 9 [2019-09-05 12:11:16,739 WARN L188 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 11 [2019-09-05 12:11:17,172 WARN L188 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 11 [2019-09-05 12:11:17,602 WARN L188 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 11 [2019-09-05 12:11:18,052 WARN L188 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 11 [2019-09-05 12:11:18,495 WARN L188 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 11 [2019-09-05 12:11:18,937 WARN L188 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 11 [2019-09-05 12:11:19,388 WARN L188 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 11 [2019-09-05 12:11:19,835 WARN L188 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 11 [2019-09-05 12:11:20,286 WARN L188 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-05 12:11:20,751 WARN L188 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-05 12:11:21,224 WARN L188 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-05 12:11:21,680 WARN L188 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-05 12:11:22,175 WARN L188 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-05 12:11:22,640 WARN L188 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-05 12:11:23,122 WARN L188 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-05 12:11:23,599 WARN L188 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-05 12:11:24,108 WARN L188 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-05 12:11:24,622 WARN L188 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-05 12:11:25,106 WARN L188 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-05 12:11:25,586 WARN L188 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-05 12:11:26,074 WARN L188 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-05 12:11:26,563 WARN L188 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-05 12:11:27,064 WARN L188 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-05 12:11:27,558 WARN L188 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-05 12:11:28,057 WARN L188 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-05 12:11:28,547 WARN L188 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-05 12:11:29,038 WARN L188 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-05 12:11:29,531 WARN L188 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-05 12:11:30,029 WARN L188 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-05 12:11:30,530 WARN L188 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-05 12:11:31,027 WARN L188 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-05 12:11:31,520 WARN L188 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-05 12:11:32,030 WARN L188 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-05 12:11:32,520 WARN L188 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-05 12:11:33,001 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-05 12:11:33,491 WARN L188 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-05 12:11:33,979 WARN L188 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-05 12:11:34,463 WARN L188 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-05 12:11:34,940 WARN L188 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-05 12:11:35,406 WARN L188 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-05 12:11:35,883 WARN L188 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-05 12:11:36,381 WARN L188 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-05 12:11:36,900 WARN L188 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-05 12:11:37,410 WARN L188 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-05 12:11:37,904 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-05 12:11:38,398 WARN L188 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-05 12:11:38,882 WARN L188 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-05 12:11:39,370 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-05 12:11:39,851 WARN L188 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-05 12:11:40,324 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-05 12:11:40,808 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-05 12:11:41,293 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-05 12:11:41,789 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-05 12:11:42,279 WARN L188 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-05 12:11:42,760 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-05 12:11:43,235 WARN L188 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-05 12:11:43,702 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-05 12:11:44,164 WARN L188 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-05 12:11:44,622 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-05 12:11:45,089 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-05 12:11:45,559 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-05 12:11:46,016 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-05 12:11:46,468 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-05 12:11:46,905 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-05 12:11:47,329 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-05 12:11:47,770 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-05 12:11:48,197 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-05 12:12:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:01,296 INFO L93 Difference]: Finished difference Result 249 states and 252 transitions. [2019-09-05 12:12:01,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2019-09-05 12:12:01,297 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 235 [2019-09-05 12:12:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:01,298 INFO L225 Difference]: With dead ends: 249 [2019-09-05 12:12:01,298 INFO L226 Difference]: Without dead ends: 244 [2019-09-05 12:12:01,299 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6784 ImplicationChecksByTransitivity, 51.9s TimeCoverageRelationStatistics Valid=13811, Invalid=40711, Unknown=0, NotChecked=0, Total=54522 [2019-09-05 12:12:01,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-09-05 12:12:01,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2019-09-05 12:12:01,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2019-09-05 12:12:01,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2019-09-05 12:12:01,308 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 235 [2019-09-05 12:12:01,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:01,309 INFO L475 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2019-09-05 12:12:01,309 INFO L476 AbstractCegarLoop]: Interpolant automaton has 119 states. [2019-09-05 12:12:01,309 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2019-09-05 12:12:01,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-09-05 12:12:01,310 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:01,310 INFO L399 BasicCegarLoop]: trace histogram [116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:01,310 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:01,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:01,311 INFO L82 PathProgramCache]: Analyzing trace with hash 336937239, now seen corresponding path program 30 times [2019-09-05 12:12:01,311 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:01,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:01,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:01,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:01,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:12:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 0 proven. 13456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:12:08,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:12:08,680 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:12:08,703 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:12:08,899 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 117 check-sat command(s) [2019-09-05 12:12:08,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:12:08,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 119 conjunts are in the unsatisfiable core [2019-09-05 12:12:08,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 0 proven. 13456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:12:09,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:12:09,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 123 [2019-09-05 12:12:09,663 INFO L454 AbstractCegarLoop]: Interpolant automaton has 123 states [2019-09-05 12:12:09,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2019-09-05 12:12:09,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=14756, Unknown=0, NotChecked=0, Total=15006 [2019-09-05 12:12:09,664 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 123 states. [2019-09-05 12:12:10,191 WARN L188 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 8 [2019-09-05 12:12:10,608 WARN L188 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 8 [2019-09-05 12:12:11,046 WARN L188 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 9 [2019-09-05 12:12:11,493 WARN L188 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 11 [2019-09-05 12:12:11,970 WARN L188 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 11 [2019-09-05 12:12:12,422 WARN L188 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 11 [2019-09-05 12:12:12,880 WARN L188 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 11 [2019-09-05 12:12:13,348 WARN L188 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 11 [2019-09-05 12:12:13,816 WARN L188 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 11 [2019-09-05 12:12:14,297 WARN L188 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 11 [2019-09-05 12:12:14,775 WARN L188 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 11 [2019-09-05 12:12:15,271 WARN L188 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 11 [2019-09-05 12:12:15,777 WARN L188 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 11 [2019-09-05 12:12:16,260 WARN L188 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 11 [2019-09-05 12:12:16,760 WARN L188 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 11 [2019-09-05 12:12:17,247 WARN L188 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-05 12:12:17,741 WARN L188 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-05 12:12:18,253 WARN L188 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-05 12:12:18,765 WARN L188 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-05 12:12:19,299 WARN L188 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-05 12:12:19,819 WARN L188 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-05 12:12:20,346 WARN L188 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-05 12:12:20,861 WARN L188 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-05 12:12:21,397 WARN L188 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-05 12:12:21,927 WARN L188 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-05 12:12:22,446 WARN L188 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-05 12:12:22,967 WARN L188 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-05 12:12:23,492 WARN L188 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-05 12:12:24,031 WARN L188 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-05 12:12:24,556 WARN L188 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-05 12:12:25,077 WARN L188 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-05 12:12:25,614 WARN L188 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-05 12:12:26,133 WARN L188 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-05 12:12:26,670 WARN L188 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-05 12:12:27,195 WARN L188 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-05 12:12:27,727 WARN L188 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-05 12:12:28,257 WARN L188 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-05 12:12:28,798 WARN L188 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-05 12:12:29,313 WARN L188 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-05 12:12:29,838 WARN L188 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-05 12:12:30,368 WARN L188 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-05 12:12:30,880 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-05 12:12:31,374 WARN L188 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-05 12:12:31,894 WARN L188 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-05 12:12:32,440 WARN L188 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-05 12:12:32,982 WARN L188 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-05 12:12:33,522 WARN L188 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-05 12:12:34,059 WARN L188 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-05 12:12:34,605 WARN L188 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-05 12:12:35,117 WARN L188 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-05 12:12:35,635 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-05 12:12:36,145 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-05 12:12:36,667 WARN L188 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-05 12:12:37,194 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-05 12:12:37,701 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-05 12:12:38,233 WARN L188 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-05 12:12:38,766 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-05 12:12:39,284 WARN L188 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-05 12:12:39,790 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-05 12:12:40,313 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-05 12:12:40,825 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-05 12:12:41,331 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-05 12:12:41,834 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-05 12:12:42,339 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-05 12:12:42,836 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-05 12:12:43,332 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-05 12:12:43,829 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-05 12:12:44,304 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-05 12:12:44,784 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-05 12:12:45,249 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-05 12:12:45,710 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-05 12:12:46,157 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-05 12:12:46,587 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-05 12:12:47,912 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2019-09-05 12:13:00,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:13:00,693 INFO L93 Difference]: Finished difference Result 257 states and 260 transitions. [2019-09-05 12:13:00,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2019-09-05 12:13:00,694 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 243 [2019-09-05 12:13:00,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:13:00,696 INFO L225 Difference]: With dead ends: 257 [2019-09-05 12:13:00,696 INFO L226 Difference]: Without dead ends: 252 [2019-09-05 12:13:00,698 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7258 ImplicationChecksByTransitivity, 56.9s TimeCoverageRelationStatistics Valid=14767, Invalid=43555, Unknown=0, NotChecked=0, Total=58322 [2019-09-05 12:13:00,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-09-05 12:13:00,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2019-09-05 12:13:00,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2019-09-05 12:13:00,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 252 transitions. [2019-09-05 12:13:00,707 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 252 transitions. Word has length 243 [2019-09-05 12:13:00,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:13:00,707 INFO L475 AbstractCegarLoop]: Abstraction has 252 states and 252 transitions. [2019-09-05 12:13:00,707 INFO L476 AbstractCegarLoop]: Interpolant automaton has 123 states. [2019-09-05 12:13:00,708 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 252 transitions. [2019-09-05 12:13:00,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2019-09-05 12:13:00,709 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:13:00,709 INFO L399 BasicCegarLoop]: trace histogram [120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:13:00,709 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:13:00,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:13:00,710 INFO L82 PathProgramCache]: Analyzing trace with hash -296928497, now seen corresponding path program 31 times [2019-09-05 12:13:00,710 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:13:00,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:13:00,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:00,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:13:00,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:13:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:13:08,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:13:08,456 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:13:08,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:13:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:13:10,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 123 conjunts are in the unsatisfiable core [2019-09-05 12:13:10,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:13:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:13:11,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:13:11,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 127 [2019-09-05 12:13:11,364 INFO L454 AbstractCegarLoop]: Interpolant automaton has 127 states [2019-09-05 12:13:11,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2019-09-05 12:13:11,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=15744, Unknown=0, NotChecked=0, Total=16002 [2019-09-05 12:13:11,365 INFO L87 Difference]: Start difference. First operand 252 states and 252 transitions. Second operand 127 states. [2019-09-05 12:13:11,912 WARN L188 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 8 [2019-09-05 12:13:12,349 WARN L188 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 8 [2019-09-05 12:13:12,816 WARN L188 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 9 [2019-09-05 12:13:13,304 WARN L188 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 11 [2019-09-05 12:13:13,782 WARN L188 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 11 [2019-09-05 12:13:14,259 WARN L188 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 11 [2019-09-05 12:13:14,747 WARN L188 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 11 [2019-09-05 12:13:15,245 WARN L188 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 11 [2019-09-05 12:13:15,741 WARN L188 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 11 [2019-09-05 12:13:16,238 WARN L188 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 11 [2019-09-05 12:13:16,766 WARN L188 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 11 [2019-09-05 12:13:17,274 WARN L188 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 11 [2019-09-05 12:13:17,785 WARN L188 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 11 [2019-09-05 12:13:18,298 WARN L188 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 11 [2019-09-05 12:13:18,813 WARN L188 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 11 [2019-09-05 12:13:19,327 WARN L188 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 11 [2019-09-05 12:13:19,857 WARN L188 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 11 [2019-09-05 12:13:20,392 WARN L188 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 11 [2019-09-05 12:13:20,953 WARN L188 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 11 [2019-09-05 12:13:21,494 WARN L188 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-05 12:13:22,039 WARN L188 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-05 12:13:22,584 WARN L188 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-05 12:13:23,127 WARN L188 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-05 12:13:23,676 WARN L188 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-05 12:13:24,233 WARN L188 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-05 12:13:24,797 WARN L188 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-05 12:13:25,362 WARN L188 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-05 12:13:25,940 WARN L188 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-05 12:13:26,517 WARN L188 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-05 12:13:27,063 WARN L188 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-05 12:13:27,625 WARN L188 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-05 12:13:28,174 WARN L188 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-05 12:13:28,725 WARN L188 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-05 12:13:29,293 WARN L188 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-05 12:13:29,863 WARN L188 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-05 12:13:30,422 WARN L188 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-05 12:13:30,984 WARN L188 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-05 12:13:31,550 WARN L188 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-05 12:13:32,111 WARN L188 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-05 12:13:32,671 WARN L188 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-05 12:13:33,235 WARN L188 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-05 12:13:33,775 WARN L188 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-05 12:13:34,315 WARN L188 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-05 12:13:34,864 WARN L188 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-05 12:13:35,420 WARN L188 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-05 12:13:35,993 WARN L188 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-05 12:13:36,581 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-05 12:13:37,144 WARN L188 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-05 12:13:37,689 WARN L188 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-05 12:13:38,252 WARN L188 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-05 12:13:38,791 WARN L188 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-05 12:13:39,318 WARN L188 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-05 12:13:39,850 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-05 12:13:40,398 WARN L188 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-05 12:13:40,926 WARN L188 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-05 12:13:41,469 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-05 12:13:42,028 WARN L188 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-05 12:13:42,580 WARN L188 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-05 12:13:43,126 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-05 12:13:43,652 WARN L188 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-05 12:13:44,179 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-05 12:13:44,703 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-05 12:13:45,250 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-05 12:13:45,793 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-05 12:13:46,327 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-05 12:13:46,872 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-05 12:13:47,397 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-05 12:13:47,910 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-05 12:13:48,427 WARN L188 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-05 12:13:48,936 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-05 12:13:49,440 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-05 12:13:49,942 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-05 12:13:50,443 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-05 12:13:50,926 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-05 12:13:51,402 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-05 12:13:51,888 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-05 12:13:52,349 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-05 12:13:52,809 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-05 12:13:53,719 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2019-09-05 12:14:06,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:06,992 INFO L93 Difference]: Finished difference Result 265 states and 268 transitions. [2019-09-05 12:14:06,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2019-09-05 12:14:06,992 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 251 [2019-09-05 12:14:06,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:06,993 INFO L225 Difference]: With dead ends: 265 [2019-09-05 12:14:06,993 INFO L226 Difference]: Without dead ends: 260 [2019-09-05 12:14:06,996 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7748 ImplicationChecksByTransitivity, 61.7s TimeCoverageRelationStatistics Valid=15755, Invalid=46495, Unknown=0, NotChecked=0, Total=62250 [2019-09-05 12:14:06,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-09-05 12:14:07,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2019-09-05 12:14:07,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2019-09-05 12:14:07,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 260 transitions. [2019-09-05 12:14:07,005 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 260 transitions. Word has length 251 [2019-09-05 12:14:07,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:07,005 INFO L475 AbstractCegarLoop]: Abstraction has 260 states and 260 transitions. [2019-09-05 12:14:07,005 INFO L476 AbstractCegarLoop]: Interpolant automaton has 127 states. [2019-09-05 12:14:07,005 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 260 transitions. [2019-09-05 12:14:07,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-09-05 12:14:07,007 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:07,007 INFO L399 BasicCegarLoop]: trace histogram [124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:07,007 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:07,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:07,007 INFO L82 PathProgramCache]: Analyzing trace with hash -741884665, now seen corresponding path program 32 times [2019-09-05 12:14:07,008 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:07,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:07,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:07,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:14:07,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:14:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 0 proven. 15376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:15,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:14:15,385 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:14:15,410 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:14:17,029 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:14:17,029 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:18,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 127 conjunts are in the unsatisfiable core [2019-09-05 12:14:18,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 0 proven. 15376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:18,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:14:18,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 131 [2019-09-05 12:14:18,570 INFO L454 AbstractCegarLoop]: Interpolant automaton has 131 states [2019-09-05 12:14:18,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2019-09-05 12:14:18,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=16764, Unknown=0, NotChecked=0, Total=17030 [2019-09-05 12:14:18,571 INFO L87 Difference]: Start difference. First operand 260 states and 260 transitions. Second operand 131 states. [2019-09-05 12:14:19,157 WARN L188 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 8 [2019-09-05 12:14:19,624 WARN L188 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 8 [2019-09-05 12:14:20,119 WARN L188 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 9 [2019-09-05 12:14:20,624 WARN L188 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 11 [2019-09-05 12:14:21,135 WARN L188 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 11 [2019-09-05 12:14:21,638 WARN L188 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 11 [2019-09-05 12:14:22,162 WARN L188 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 11 [2019-09-05 12:14:22,700 WARN L188 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 11 [2019-09-05 12:14:23,222 WARN L188 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 11 [2019-09-05 12:14:23,745 WARN L188 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 11 [2019-09-05 12:14:24,283 WARN L188 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 11 [2019-09-05 12:14:24,813 WARN L188 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 11 [2019-09-05 12:14:25,346 WARN L188 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 11 [2019-09-05 12:14:25,891 WARN L188 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 11 [2019-09-05 12:14:26,440 WARN L188 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 11 [2019-09-05 12:14:26,989 WARN L188 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 11 [2019-09-05 12:14:27,538 WARN L188 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 11 [2019-09-05 12:14:28,105 WARN L188 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 11 [2019-09-05 12:14:28,672 WARN L188 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 11 [2019-09-05 12:14:29,247 WARN L188 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 11 [2019-09-05 12:14:29,827 WARN L188 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 11 [2019-09-05 12:14:30,398 WARN L188 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 11 [2019-09-05 12:14:30,973 WARN L188 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 11 [2019-09-05 12:14:31,560 WARN L188 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-05 12:14:32,139 WARN L188 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-05 12:14:32,746 WARN L188 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-05 12:14:33,337 WARN L188 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-05 12:14:33,931 WARN L188 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-05 12:14:34,526 WARN L188 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-05 12:14:35,118 WARN L188 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-05 12:14:35,709 WARN L188 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-05 12:14:36,297 WARN L188 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-05 12:14:36,903 WARN L188 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-05 12:14:37,502 WARN L188 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-05 12:14:38,095 WARN L188 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-05 12:14:38,691 WARN L188 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-05 12:14:39,277 WARN L188 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-05 12:14:39,860 WARN L188 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-05 12:14:40,447 WARN L188 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-05 12:14:41,040 WARN L188 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-05 12:14:41,630 WARN L188 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-05 12:14:42,214 WARN L188 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-05 12:14:42,789 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-05 12:14:43,388 WARN L188 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-05 12:14:43,982 WARN L188 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-05 12:14:44,598 WARN L188 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-05 12:14:45,217 WARN L188 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-05 12:14:45,827 WARN L188 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-05 12:14:46,427 WARN L188 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-05 12:14:47,010 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-05 12:14:47,596 WARN L188 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-05 12:14:48,185 WARN L188 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-05 12:14:48,782 WARN L188 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-05 12:14:49,356 WARN L188 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-05 12:14:49,921 WARN L188 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-05 12:14:50,522 WARN L188 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-05 12:14:51,130 WARN L188 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-05 12:14:51,706 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-05 12:14:52,287 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-05 12:14:52,847 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-05 12:14:53,420 WARN L188 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-05 12:14:53,981 WARN L188 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-05 12:14:54,569 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-05 12:14:55,153 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-05 12:14:55,725 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-05 12:14:56,314 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-05 12:14:56,887 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-05 12:14:57,452 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-05 12:14:58,010 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-05 12:14:58,578 WARN L188 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-05 12:14:59,132 WARN L188 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-05 12:14:59,683 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-05 12:15:00,223 WARN L188 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-05 12:15:00,762 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-05 12:15:01,258 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-05 12:15:01,793 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-05 12:15:02,311 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-05 12:15:02,837 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-05 12:15:03,344 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-05 12:15:03,833 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-05 12:15:04,309 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-05 12:15:19,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:15:19,613 INFO L93 Difference]: Finished difference Result 273 states and 276 transitions. [2019-09-05 12:15:19,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2019-09-05 12:15:19,614 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 259 [2019-09-05 12:15:19,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:15:19,616 INFO L225 Difference]: With dead ends: 273 [2019-09-05 12:15:19,616 INFO L226 Difference]: Without dead ends: 268 [2019-09-05 12:15:19,618 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8254 ImplicationChecksByTransitivity, 67.6s TimeCoverageRelationStatistics Valid=16775, Invalid=49531, Unknown=0, NotChecked=0, Total=66306 [2019-09-05 12:15:19,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-09-05 12:15:19,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2019-09-05 12:15:19,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2019-09-05 12:15:19,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2019-09-05 12:15:19,626 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 259 [2019-09-05 12:15:19,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:15:19,627 INFO L475 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2019-09-05 12:15:19,627 INFO L476 AbstractCegarLoop]: Interpolant automaton has 131 states. [2019-09-05 12:15:19,627 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2019-09-05 12:15:19,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-09-05 12:15:19,628 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:15:19,628 INFO L399 BasicCegarLoop]: trace histogram [128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:15:19,629 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:15:19,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:15:19,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1115896065, now seen corresponding path program 33 times [2019-09-05 12:15:19,629 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:15:19,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:15:19,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:15:19,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:15:19,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:15:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:15:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 0 proven. 16384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:15:28,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:15:28,570 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:15:28,580 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:15:28,795 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 129 check-sat command(s) [2019-09-05 12:15:28,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:15:28,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 131 conjunts are in the unsatisfiable core [2019-09-05 12:15:28,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:15:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 0 proven. 16384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:15:29,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:15:29,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 135 [2019-09-05 12:15:29,277 INFO L454 AbstractCegarLoop]: Interpolant automaton has 135 states [2019-09-05 12:15:29,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2019-09-05 12:15:29,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=17816, Unknown=0, NotChecked=0, Total=18090 [2019-09-05 12:15:29,278 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 135 states. [2019-09-05 12:15:29,892 WARN L188 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 8 [2019-09-05 12:15:30,377 WARN L188 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 8 [2019-09-05 12:15:30,916 WARN L188 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 9 [2019-09-05 12:15:31,441 WARN L188 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 11 [2019-09-05 12:15:31,980 WARN L188 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 11 [2019-09-05 12:15:32,514 WARN L188 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 11 [2019-09-05 12:15:33,057 WARN L188 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 11 [2019-09-05 12:15:33,607 WARN L188 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 11 [2019-09-05 12:15:34,163 WARN L188 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 11 [2019-09-05 12:15:34,712 WARN L188 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 11 [2019-09-05 12:15:35,280 WARN L188 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 11 [2019-09-05 12:15:35,853 WARN L188 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 11 [2019-09-05 12:15:36,435 WARN L188 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 11 [2019-09-05 12:15:37,005 WARN L188 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 11 [2019-09-05 12:15:37,586 WARN L188 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 11 [2019-09-05 12:15:38,161 WARN L188 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 11 [2019-09-05 12:15:38,740 WARN L188 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 11 [2019-09-05 12:15:39,331 WARN L188 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 11 [2019-09-05 12:15:39,918 WARN L188 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 11 [2019-09-05 12:15:40,530 WARN L188 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 11 [2019-09-05 12:15:41,139 WARN L188 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 11 [2019-09-05 12:15:41,750 WARN L188 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 11 [2019-09-05 12:15:42,354 WARN L188 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 11 [2019-09-05 12:15:42,966 WARN L188 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 11 [2019-09-05 12:15:43,580 WARN L188 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 11 [2019-09-05 12:15:44,196 WARN L188 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 11 [2019-09-05 12:15:44,829 WARN L188 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 11 [2019-09-05 12:15:45,460 WARN L188 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-05 12:15:46,076 WARN L188 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-05 12:15:46,705 WARN L188 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-05 12:15:47,319 WARN L188 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-05 12:15:47,936 WARN L188 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-05 12:15:48,569 WARN L188 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-05 12:15:49,189 WARN L188 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-05 12:15:49,818 WARN L188 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-05 12:15:50,435 WARN L188 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-05 12:15:51,059 WARN L188 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-05 12:15:51,676 WARN L188 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-05 12:15:52,298 WARN L188 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-05 12:15:52,919 WARN L188 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-05 12:15:53,573 WARN L188 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-05 12:15:54,203 WARN L188 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-05 12:15:54,817 WARN L188 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-05 12:15:55,443 WARN L188 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-05 12:15:56,068 WARN L188 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-05 12:15:56,712 WARN L188 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-05 12:15:57,357 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-05 12:15:57,995 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-05 12:15:58,630 WARN L188 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-05 12:15:59,271 WARN L188 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-05 12:15:59,912 WARN L188 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-05 12:16:00,547 WARN L188 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-05 12:16:01,193 WARN L188 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-05 12:16:01,850 WARN L188 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-05 12:16:02,488 WARN L188 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-05 12:16:03,113 WARN L188 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-05 12:16:03,756 WARN L188 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-05 12:16:04,347 WARN L188 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-05 12:16:04,966 WARN L188 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-05 12:16:05,575 WARN L188 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-05 12:16:06,163 WARN L188 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-05 12:16:06,759 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-05 12:16:07,386 WARN L188 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-05 12:16:08,014 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-05 12:16:08,633 WARN L188 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-05 12:16:09,243 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-05 12:16:09,850 WARN L188 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-05 12:16:10,462 WARN L188 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-05 12:16:11,089 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-05 12:16:11,690 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-05 12:16:12,289 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-05 12:16:12,864 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-05 12:16:13,447 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-05 12:16:14,041 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-05 12:16:14,610 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-05 12:16:15,170 WARN L188 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-05 12:16:15,709 WARN L188 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-05 12:16:16,259 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-05 12:16:16,791 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-05 12:16:17,310 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-05 12:16:17,828 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-05 12:16:18,342 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-05 12:16:18,854 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-05 12:16:19,368 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-05 12:16:35,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:16:35,650 INFO L93 Difference]: Finished difference Result 281 states and 284 transitions. [2019-09-05 12:16:35,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2019-09-05 12:16:35,650 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 267 [2019-09-05 12:16:35,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:16:35,652 INFO L225 Difference]: With dead ends: 281 [2019-09-05 12:16:35,652 INFO L226 Difference]: Without dead ends: 276 [2019-09-05 12:16:35,655 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8776 ImplicationChecksByTransitivity, 73.2s TimeCoverageRelationStatistics Valid=17827, Invalid=52663, Unknown=0, NotChecked=0, Total=70490 [2019-09-05 12:16:35,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-09-05 12:16:35,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2019-09-05 12:16:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2019-09-05 12:16:35,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 276 transitions. [2019-09-05 12:16:35,664 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 276 transitions. Word has length 267 [2019-09-05 12:16:35,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:16:35,664 INFO L475 AbstractCegarLoop]: Abstraction has 276 states and 276 transitions. [2019-09-05 12:16:35,664 INFO L476 AbstractCegarLoop]: Interpolant automaton has 135 states. [2019-09-05 12:16:35,664 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 276 transitions. [2019-09-05 12:16:35,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2019-09-05 12:16:35,666 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:16:35,666 INFO L399 BasicCegarLoop]: trace histogram [132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:16:35,666 INFO L418 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:16:35,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:16:35,666 INFO L82 PathProgramCache]: Analyzing trace with hash 744773879, now seen corresponding path program 34 times [2019-09-05 12:16:35,667 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:16:35,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:16:35,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:35,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:16:35,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:16:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 17424 backedges. 0 proven. 17424 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:16:45,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:16:45,188 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:16:45,199 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:16:45,447 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:16:45,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:16:45,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 135 conjunts are in the unsatisfiable core [2019-09-05 12:16:45,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:16:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17424 backedges. 0 proven. 17424 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:16:46,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:16:46,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 139 [2019-09-05 12:16:46,055 INFO L454 AbstractCegarLoop]: Interpolant automaton has 139 states [2019-09-05 12:16:46,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2019-09-05 12:16:46,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=18900, Unknown=0, NotChecked=0, Total=19182 [2019-09-05 12:16:46,056 INFO L87 Difference]: Start difference. First operand 276 states and 276 transitions. Second operand 139 states. [2019-09-05 12:16:46,681 WARN L188 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 8 [2019-09-05 12:16:47,218 WARN L188 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 8 [2019-09-05 12:16:47,766 WARN L188 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 9 [2019-09-05 12:16:48,320 WARN L188 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 11 [2019-09-05 12:16:48,882 WARN L188 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 11 [2019-09-05 12:16:49,451 WARN L188 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 11 [2019-09-05 12:16:50,017 WARN L188 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 11 [2019-09-05 12:16:50,583 WARN L188 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 11 [2019-09-05 12:16:51,160 WARN L188 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 11 [2019-09-05 12:16:51,765 WARN L188 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 11 [2019-09-05 12:16:52,362 WARN L188 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 11 [2019-09-05 12:16:52,956 WARN L188 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 11 [2019-09-05 12:16:53,551 WARN L188 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 11 [2019-09-05 12:16:54,152 WARN L188 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 11 [2019-09-05 12:16:54,748 WARN L188 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 11 [2019-09-05 12:16:55,350 WARN L188 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 11 [2019-09-05 12:16:55,963 WARN L188 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 11 [2019-09-05 12:16:56,577 WARN L188 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 11 [2019-09-05 12:16:57,204 WARN L188 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 11 [2019-09-05 12:16:57,866 WARN L188 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 11 [2019-09-05 12:16:58,494 WARN L188 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 11 [2019-09-05 12:16:59,116 WARN L188 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 11 [2019-09-05 12:16:59,751 WARN L188 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 11 [2019-09-05 12:17:00,391 WARN L188 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 11 [2019-09-05 12:17:01,036 WARN L188 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 11