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-acceleration/functions_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 02:43:26,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 02:43:26,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 02:43:26,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-08 02:43:26,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 02:43:26,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 02:43:26,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 02:43:26,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 02:43:26,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 02:43:26,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 02:43:26,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 02:43:26,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 02:43:26,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 02:43:26,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 02:43:26,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 02:43:26,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 02:43:26,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 02:43:26,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 02:43:26,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 02:43:26,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 02:43:26,682 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 [2019-09-08 02:43:26,708 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 02:43:26,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 02:43:26,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 02:43:26,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 02:43:26,711 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 02:43:26,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 02:43:26,711 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 02:43:26,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 02:43:26,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 02:43:26,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 02:43:26,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 02:43:26,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 02:43:26,713 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 02:43:26,713 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 02:43:26,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 02:43:26,714 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 02:43:26,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 02:43:26,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 02:43:26,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 02:43:26,715 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 02:43:26,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 02:43:26,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 02:43:26,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 02:43:26,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 02:43:26,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 02:43:26,716 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 02:43:26,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 02:43:26,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 02:43:26,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 02:43:26,749 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 02:43:26,771 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 02:43:26,775 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 02:43:26,777 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 02:43:26,780 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 02:43:26,781 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/functions_1-2.c [2019-09-08 02:43:26,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45360486c/5c39c8d1366246a3a6c17b3d44f876ef/FLAGfa1bcd161 [2019-09-08 02:43:27,307 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 02:43:27,308 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-2.c [2019-09-08 02:43:27,315 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45360486c/5c39c8d1366246a3a6c17b3d44f876ef/FLAGfa1bcd161 [2019-09-08 02:43:27,706 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45360486c/5c39c8d1366246a3a6c17b3d44f876ef [2019-09-08 02:43:27,717 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 02:43:27,719 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 02:43:27,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 02:43:27,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 02:43:27,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 02:43:27,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 02:43:27" (1/1) ... [2019-09-08 02:43:27,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d21465a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:43:27, skipping insertion in model container [2019-09-08 02:43:27,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 02:43:27" (1/1) ... [2019-09-08 02:43:27,735 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 02:43:27,749 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 02:43:27,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 02:43:27,935 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 02:43:27,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 02:43:27,978 INFO L192 MainTranslator]: Completed translation [2019-09-08 02:43:27,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:43:27 WrapperNode [2019-09-08 02:43:27,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 02:43:27,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 02:43:27,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 02:43:27,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 02:43:28,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:43:27" (1/1) ... [2019-09-08 02:43:28,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:43:27" (1/1) ... [2019-09-08 02:43:28,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:43:27" (1/1) ... [2019-09-08 02:43:28,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:43:27" (1/1) ... [2019-09-08 02:43:28,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:43:27" (1/1) ... [2019-09-08 02:43:28,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:43:27" (1/1) ... [2019-09-08 02:43:28,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:43:27" (1/1) ... [2019-09-08 02:43:28,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 02:43:28,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 02:43:28,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 02:43:28,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 02:43:28,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:43:27" (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 [2019-09-08 02:43:28,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 02:43:28,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 02:43:28,178 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-08 02:43:28,178 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2019-09-08 02:43:28,178 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 02:43:28,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 02:43:28,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-08 02:43:28,179 INFO L130 BoogieDeclarations]: Found specification of procedure f [2019-09-08 02:43:28,179 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 02:43:28,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 02:43:28,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 02:43:28,378 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 02:43:28,379 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-08 02:43:28,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 02:43:28 BoogieIcfgContainer [2019-09-08 02:43:28,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 02:43:28,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 02:43:28,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 02:43:28,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 02:43:28,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 02:43:27" (1/3) ... [2019-09-08 02:43:28,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21da0146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 02:43:28, skipping insertion in model container [2019-09-08 02:43:28,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:43:27" (2/3) ... [2019-09-08 02:43:28,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21da0146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 02:43:28, skipping insertion in model container [2019-09-08 02:43:28,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 02:43:28" (3/3) ... [2019-09-08 02:43:28,389 INFO L109 eAbstractionObserver]: Analyzing ICFG functions_1-2.c [2019-09-08 02:43:28,400 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 02:43:28,409 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 02:43:28,428 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 02:43:28,461 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 02:43:28,462 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 02:43:28,462 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 02:43:28,462 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 02:43:28,462 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 02:43:28,462 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 02:43:28,463 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 02:43:28,463 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 02:43:28,463 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 02:43:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-09-08 02:43:28,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-08 02:43:28,490 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:43:28,491 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:43:28,494 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:43:28,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:43:28,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1238725826, now seen corresponding path program 1 times [2019-09-08 02:43:28,502 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:43:28,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:43:28,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:28,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 02:43:28,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:43:28,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 02:43:28,621 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 02:43:28,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-08 02:43:28,626 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-08 02:43:28,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-08 02:43:28,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-08 02:43:28,645 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-09-08 02:43:28,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:43:28,671 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-09-08 02:43:28,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-08 02:43:28,672 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-08 02:43:28,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:43:28,682 INFO L225 Difference]: With dead ends: 33 [2019-09-08 02:43:28,682 INFO L226 Difference]: Without dead ends: 16 [2019-09-08 02:43:28,686 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 [2019-09-08 02:43:28,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-08 02:43:28,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-08 02:43:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-08 02:43:28,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-08 02:43:28,728 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 10 [2019-09-08 02:43:28,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:43:28,728 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-08 02:43:28,729 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-08 02:43:28,729 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-08 02:43:28,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-08 02:43:28,730 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:43:28,730 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:43:28,730 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:43:28,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:43:28,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1244266952, now seen corresponding path program 1 times [2019-09-08 02:43:28,731 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:43:28,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:43:28,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:28,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 02:43:28,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:43:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 02:43:28,872 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 02:43:28,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-08 02:43:28,874 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-08 02:43:28,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-08 02:43:28,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-08 02:43:28,876 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2019-09-08 02:43:28,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:43:28,917 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-09-08 02:43:28,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-08 02:43:28,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-08 02:43:28,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:43:28,926 INFO L225 Difference]: With dead ends: 24 [2019-09-08 02:43:28,926 INFO L226 Difference]: Without dead ends: 19 [2019-09-08 02:43:28,930 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-08 02:43:28,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-08 02:43:28,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-09-08 02:43:28,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-08 02:43:28,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-09-08 02:43:28,953 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2019-09-08 02:43:28,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:43:28,954 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-09-08 02:43:28,954 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-08 02:43:28,954 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-09-08 02:43:28,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-08 02:43:28,955 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:43:28,955 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:43:28,955 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:43:28,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:43:28,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1831198934, now seen corresponding path program 1 times [2019-09-08 02:43:28,960 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:43:28,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:43:28,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:28,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 02:43:28,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:43:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 02:43:29,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:43:29,154 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 [2019-09-08 02:43:29,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 02:43:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:43:29,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-08 02:43:29,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:43:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 02:43:29,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:43:29,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-08 02:43:29,290 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 02:43:29,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 02:43:29,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-08 02:43:29,291 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 7 states. [2019-09-08 02:43:29,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:43:29,384 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-09-08 02:43:29,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 02:43:29,386 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-09-08 02:43:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:43:29,387 INFO L225 Difference]: With dead ends: 27 [2019-09-08 02:43:29,387 INFO L226 Difference]: Without dead ends: 22 [2019-09-08 02:43:29,387 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-08 02:43:29,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-08 02:43:29,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-09-08 02:43:29,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-08 02:43:29,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-09-08 02:43:29,394 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2019-09-08 02:43:29,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:43:29,394 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-09-08 02:43:29,395 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 02:43:29,395 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-09-08 02:43:29,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-08 02:43:29,396 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:43:29,397 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:43:29,397 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:43:29,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:43:29,398 INFO L82 PathProgramCache]: Analyzing trace with hash 329045236, now seen corresponding path program 2 times [2019-09-08 02:43:29,398 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:43:29,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:43:29,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:29,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 02:43:29,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:43:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-08 02:43:29,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:43:29,584 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 02:43:29,610 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 02:43:29,627 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 02:43:29,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:43:29,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-08 02:43:29,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:43:29,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-08 02:43:29,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:43:29,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-08 02:43:29,698 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-08 02:43:29,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-08 02:43:29,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-09-08 02:43:29,699 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2019-09-08 02:43:29,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:43:29,846 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2019-09-08 02:43:29,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-08 02:43:29,846 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-09-08 02:43:29,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:43:29,847 INFO L225 Difference]: With dead ends: 30 [2019-09-08 02:43:29,847 INFO L226 Difference]: Without dead ends: 25 [2019-09-08 02:43:29,848 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-09-08 02:43:29,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-08 02:43:29,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-09-08 02:43:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-08 02:43:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-09-08 02:43:29,855 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 22 [2019-09-08 02:43:29,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:43:29,855 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-09-08 02:43:29,855 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-08 02:43:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-09-08 02:43:29,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-08 02:43:29,856 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:43:29,857 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:43:29,857 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:43:29,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:43:29,857 INFO L82 PathProgramCache]: Analyzing trace with hash 755481234, now seen corresponding path program 3 times [2019-09-08 02:43:29,857 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:43:29,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:43:29,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:29,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:43:29,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:43:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-08 02:43:30,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:43:30,057 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) [2019-09-08 02:43:30,073 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 02:43:30,123 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-08 02:43:30,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:43:30,125 WARN L254 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-08 02:43:30,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:43:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (4)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 02:43:30,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:43:30,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-08 02:43:30,192 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 02:43:30,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 02:43:30,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-09-08 02:43:30,193 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 11 states. [2019-09-08 02:43:30,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:43:30,369 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-09-08 02:43:30,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 02:43:30,369 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-09-08 02:43:30,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:43:30,370 INFO L225 Difference]: With dead ends: 33 [2019-09-08 02:43:30,370 INFO L226 Difference]: Without dead ends: 28 [2019-09-08 02:43:30,371 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-09-08 02:43:30,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-08 02:43:30,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-09-08 02:43:30,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-08 02:43:30,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-09-08 02:43:30,380 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 28 [2019-09-08 02:43:30,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:43:30,381 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-09-08 02:43:30,381 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 02:43:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-09-08 02:43:30,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-08 02:43:30,383 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:43:30,384 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:43:30,384 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:43:30,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:43:30,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1475645008, now seen corresponding path program 4 times [2019-09-08 02:43:30,385 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:43:30,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:43:30,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:30,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:43:30,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:43:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-08 02:43:30,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:43:30,664 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) [2019-09-08 02:43:30,679 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 02:43:30,701 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 02:43:30,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:43:30,704 WARN L254 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-08 02:43:30,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:43:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Stream closed [2019-09-08 02:43:30,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:43:30,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-08 02:43:30,779 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 02:43:30,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 02:43:30,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-09-08 02:43:30,781 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 13 states. [2019-09-08 02:43:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:43:31,051 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2019-09-08 02:43:31,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 02:43:31,051 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2019-09-08 02:43:31,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:43:31,053 INFO L225 Difference]: With dead ends: 36 [2019-09-08 02:43:31,053 INFO L226 Difference]: Without dead ends: 31 [2019-09-08 02:43:31,053 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2019-09-08 02:43:31,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-08 02:43:31,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-09-08 02:43:31,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-08 02:43:31,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-09-08 02:43:31,068 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 34 [2019-09-08 02:43:31,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:43:31,069 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-09-08 02:43:31,069 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 02:43:31,069 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-09-08 02:43:31,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-08 02:43:31,072 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:43:31,073 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:43:31,073 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:43:31,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:43:31,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1545919054, now seen corresponding path program 5 times [2019-09-08 02:43:31,074 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:43:31,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:43:31,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:31,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:43:31,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:43:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-09-08 02:43:31,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:43:31,368 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 02:43:31,391 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 02:43:31,427 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-08 02:43:31,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:43:31,428 WARN L254 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2019-09-08 02:43:31,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:43:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-09-08 02:43:31,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:43:31,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-08 02:43:31,508 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-08 02:43:31,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-08 02:43:31,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2019-09-08 02:43:31,509 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 15 states. [2019-09-08 02:43:31,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:43:31,798 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2019-09-08 02:43:31,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-08 02:43:31,798 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2019-09-08 02:43:31,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:43:31,799 INFO L225 Difference]: With dead ends: 39 [2019-09-08 02:43:31,800 INFO L226 Difference]: Without dead ends: 34 [2019-09-08 02:43:31,801 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2019-09-08 02:43:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-08 02:43:31,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-09-08 02:43:31,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-08 02:43:31,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-09-08 02:43:31,812 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 40 [2019-09-08 02:43:31,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:43:31,812 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-09-08 02:43:31,812 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-08 02:43:31,812 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-09-08 02:43:31,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-08 02:43:31,814 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:43:31,814 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:43:31,815 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:43:31,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:43:31,815 INFO L82 PathProgramCache]: Analyzing trace with hash 128504940, now seen corresponding path program 6 times [2019-09-08 02:43:31,815 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:43:31,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:43:31,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:31,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:43:31,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:43:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-08 02:43:32,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:43:32,113 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) [2019-09-08 02:43:32,134 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 02:43:32,171 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-08 02:43:32,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:43:32,173 WARN L254 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 63 conjunts are in the unsatisfiable core [2019-09-08 02:43:32,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:43:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-08 02:43:32,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:43:32,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-08 02:43:32,276 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 02:43:32,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 02:43:32,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2019-09-08 02:43:32,276 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 17 states. [2019-09-08 02:43:32,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:43:32,613 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2019-09-08 02:43:32,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 02:43:32,614 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2019-09-08 02:43:32,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:43:32,615 INFO L225 Difference]: With dead ends: 42 [2019-09-08 02:43:32,615 INFO L226 Difference]: Without dead ends: 37 [2019-09-08 02:43:32,616 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2019-09-08 02:43:32,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-08 02:43:32,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-09-08 02:43:32,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-08 02:43:32,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-09-08 02:43:32,622 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 46 [2019-09-08 02:43:32,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:43:32,623 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-09-08 02:43:32,623 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 02:43:32,623 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-09-08 02:43:32,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-08 02:43:32,624 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:43:32,624 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:43:32,624 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:43:32,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:43:32,625 INFO L82 PathProgramCache]: Analyzing trace with hash -842776566, now seen corresponding path program 7 times [2019-09-08 02:43:32,625 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:43:32,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:43:32,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:32,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:43:32,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:43:32,934 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-09-08 02:43:32,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:43:32,935 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) [2019-09-08 02:43:32,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 02:43:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:43:32,978 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 73 conjunts are in the unsatisfiable core [2019-09-08 02:43:32,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:43:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-09-08 02:43:33,134 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:43:33,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-08 02:43:33,135 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 02:43:33,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 02:43:33,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2019-09-08 02:43:33,136 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 19 states. [2019-09-08 02:43:33,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:43:33,608 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2019-09-08 02:43:33,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 02:43:33,613 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2019-09-08 02:43:33,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:43:33,615 INFO L225 Difference]: With dead ends: 45 [2019-09-08 02:43:33,615 INFO L226 Difference]: Without dead ends: 40 [2019-09-08 02:43:33,616 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2019-09-08 02:43:33,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-08 02:43:33,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2019-09-08 02:43:33,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-08 02:43:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-09-08 02:43:33,622 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 52 [2019-09-08 02:43:33,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:43:33,623 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-09-08 02:43:33,623 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 02:43:33,623 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-09-08 02:43:33,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-08 02:43:33,624 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:43:33,624 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:43:33,625 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:43:33,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:43:33,625 INFO L82 PathProgramCache]: Analyzing trace with hash 880540968, now seen corresponding path program 8 times [2019-09-08 02:43:33,625 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:43:33,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:43:33,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:33,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 02:43:33,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:43:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-09-08 02:43:33,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:43:33,988 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 [2019-09-08 02:43:34,011 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 02:43:34,033 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 02:43:34,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:43:34,035 WARN L254 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 83 conjunts are in the unsatisfiable core [2019-09-08 02:43:34,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:43:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-09-08 02:43:34,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:43:34,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-09-08 02:43:34,144 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-08 02:43:34,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-08 02:43:34,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2019-09-08 02:43:34,146 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 21 states. [2019-09-08 02:43:34,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:43:34,711 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2019-09-08 02:43:34,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-08 02:43:34,711 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2019-09-08 02:43:34,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:43:34,713 INFO L225 Difference]: With dead ends: 48 [2019-09-08 02:43:34,713 INFO L226 Difference]: Without dead ends: 43 [2019-09-08 02:43:34,714 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2019-09-08 02:43:34,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-08 02:43:34,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2019-09-08 02:43:34,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-08 02:43:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2019-09-08 02:43:34,720 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 58 [2019-09-08 02:43:34,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:43:34,721 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2019-09-08 02:43:34,721 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-08 02:43:34,721 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2019-09-08 02:43:34,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-08 02:43:34,722 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:43:34,722 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:43:34,723 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:43:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:43:34,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1565725754, now seen corresponding path program 9 times [2019-09-08 02:43:34,723 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:43:34,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:43:34,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:34,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:43:34,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:43:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:43:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-09-08 02:43:35,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:43:35,088 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 02:43:35,114 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 02:44:44,090 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-08 02:44:44,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:44:44,537 WARN L254 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 94 conjunts are in the unsatisfiable core [2019-09-08 02:44:44,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:44:44,703 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (10)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 02:44:44,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:44:44,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-08 02:44:44,715 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-08 02:44:44,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-08 02:44:44,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2019-09-08 02:44:44,716 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 23 states. [2019-09-08 02:44:45,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:44:45,334 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2019-09-08 02:44:45,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-08 02:44:45,335 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2019-09-08 02:44:45,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:44:45,336 INFO L225 Difference]: With dead ends: 51 [2019-09-08 02:44:45,336 INFO L226 Difference]: Without dead ends: 46 [2019-09-08 02:44:45,339 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 61 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2019-09-08 02:44:45,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-08 02:44:45,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2019-09-08 02:44:45,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-08 02:44:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-09-08 02:44:45,352 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 64 [2019-09-08 02:44:45,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:44:45,352 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-09-08 02:44:45,352 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-08 02:44:45,352 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-09-08 02:44:45,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-08 02:44:45,357 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:44:45,357 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:44:45,357 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:44:45,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:44:45,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1577839588, now seen corresponding path program 10 times [2019-09-08 02:44:45,358 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:44:45,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:44:45,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:44:45,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:44:45,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:44:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:44:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-09-08 02:44:45,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:44:45,801 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) [2019-09-08 02:44:45,830 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 02:44:45,858 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 02:44:45,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:44:45,861 WARN L254 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 103 conjunts are in the unsatisfiable core [2019-09-08 02:44:45,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:44:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 02:44:46,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:44:46,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-08 02:44:46,002 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-08 02:44:46,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-08 02:44:46,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2019-09-08 02:44:46,004 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 25 states. [2019-09-08 02:44:46,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:44:46,750 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2019-09-08 02:44:46,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-08 02:44:46,750 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 70 [2019-09-08 02:44:46,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:44:46,752 INFO L225 Difference]: With dead ends: 54 [2019-09-08 02:44:46,752 INFO L226 Difference]: Without dead ends: 49 [2019-09-08 02:44:46,753 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 68 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 02:44:46,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-08 02:44:46,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2019-09-08 02:44:46,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-08 02:44:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2019-09-08 02:44:46,760 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 70 [2019-09-08 02:44:46,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:44:46,760 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2019-09-08 02:44:46,761 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-08 02:44:46,761 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2019-09-08 02:44:46,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-08 02:44:46,762 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:44:46,762 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:44:46,762 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:44:46,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:44:46,763 INFO L82 PathProgramCache]: Analyzing trace with hash 153476482, now seen corresponding path program 11 times [2019-09-08 02:44:46,763 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:44:46,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:44:46,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:44:46,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:44:46,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:44:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:44:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-09-08 02:44:47,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:44:47,227 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-08 02:44:47,239 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 02:45:55,335 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-08 02:45:55,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:45:55,442 WARN L254 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 113 conjunts are in the unsatisfiable core [2019-09-08 02:45:55,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:45:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-09-08 02:45:55,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:45:55,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-09-08 02:45:55,581 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-08 02:45:55,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-08 02:45:55,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2019-09-08 02:45:55,583 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 27 states. [2019-09-08 02:45:56,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:45:56,435 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2019-09-08 02:45:56,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-08 02:45:56,437 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 76 [2019-09-08 02:45:56,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:45:56,438 INFO L225 Difference]: With dead ends: 57 [2019-09-08 02:45:56,439 INFO L226 Difference]: Without dead ends: 52 [2019-09-08 02:45:56,440 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 74 SyntacticMatches, 13 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2019-09-08 02:45:56,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-08 02:45:56,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2019-09-08 02:45:56,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-08 02:45:56,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2019-09-08 02:45:56,448 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 76 [2019-09-08 02:45:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:45:56,448 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2019-09-08 02:45:56,448 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-08 02:45:56,448 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2019-09-08 02:45:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-08 02:45:56,449 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:45:56,449 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:45:56,450 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:45:56,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:45:56,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1587568480, now seen corresponding path program 12 times [2019-09-08 02:45:56,450 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:45:56,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:45:56,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:45:56,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:45:56,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:45:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:45:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-09-08 02:45:56,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:45:56,959 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 [2019-09-08 02:45:56,970 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 02:45:57,090 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-08 02:45:57,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:45:57,093 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 123 conjunts are in the unsatisfiable core [2019-09-08 02:45:57,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:45:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-09-08 02:45:57,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:45:57,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-09-08 02:45:57,243 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-08 02:45:57,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-08 02:45:57,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2019-09-08 02:45:57,244 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand 29 states. [2019-09-08 02:45:58,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:45:58,176 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2019-09-08 02:45:58,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-08 02:45:58,177 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 82 [2019-09-08 02:45:58,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:45:58,178 INFO L225 Difference]: With dead ends: 60 [2019-09-08 02:45:58,179 INFO L226 Difference]: Without dead ends: 55 [2019-09-08 02:45:58,180 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 80 SyntacticMatches, 14 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2019-09-08 02:45:58,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-08 02:45:58,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2019-09-08 02:45:58,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-08 02:45:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2019-09-08 02:45:58,186 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 82 [2019-09-08 02:45:58,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:45:58,186 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2019-09-08 02:45:58,187 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-08 02:45:58,187 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2019-09-08 02:45:58,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-08 02:45:58,188 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:45:58,188 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:45:58,188 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:45:58,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:45:58,188 INFO L82 PathProgramCache]: Analyzing trace with hash -50981570, now seen corresponding path program 13 times [2019-09-08 02:45:58,189 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:45:58,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:45:58,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:45:58,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:45:58,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:45:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:45:58,733 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2019-09-08 02:45:58,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:45:58,734 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 [2019-09-08 02:45:58,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 02:45:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:45:58,779 WARN L254 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 133 conjunts are in the unsatisfiable core [2019-09-08 02:45:58,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:45:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2019-09-08 02:45:58,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:45:58,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-09-08 02:45:58,893 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-08 02:45:58,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-08 02:45:58,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2019-09-08 02:45:58,894 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 31 states. [2019-09-08 02:46:00,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:46:00,023 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2019-09-08 02:46:00,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 02:46:00,024 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 88 [2019-09-08 02:46:00,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:46:00,025 INFO L225 Difference]: With dead ends: 63 [2019-09-08 02:46:00,025 INFO L226 Difference]: Without dead ends: 58 [2019-09-08 02:46:00,026 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 86 SyntacticMatches, 15 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=1754, Unknown=0, NotChecked=0, Total=1892 [2019-09-08 02:46:00,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-08 02:46:00,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2019-09-08 02:46:00,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-08 02:46:00,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2019-09-08 02:46:00,033 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 88 [2019-09-08 02:46:00,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:46:00,033 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2019-09-08 02:46:00,033 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-08 02:46:00,034 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2019-09-08 02:46:00,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-09-08 02:46:00,035 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:46:00,035 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:46:00,035 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:46:00,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:46:00,035 INFO L82 PathProgramCache]: Analyzing trace with hash -922870948, now seen corresponding path program 14 times [2019-09-08 02:46:00,035 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:46:00,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:46:00,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:46:00,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 02:46:00,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:46:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:46:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2019-09-08 02:46:00,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:46:00,783 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 [2019-09-08 02:46:00,799 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 02:46:00,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 02:46:00,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:46:00,839 WARN L254 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 143 conjunts are in the unsatisfiable core [2019-09-08 02:46:00,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:46:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2019-09-08 02:46:00,963 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:46:00,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-09-08 02:46:00,964 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-08 02:46:00,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-08 02:46:00,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2019-09-08 02:46:00,965 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand 33 states. [2019-09-08 02:46:02,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:46:02,449 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2019-09-08 02:46:02,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-08 02:46:02,449 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 94 [2019-09-08 02:46:02,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:46:02,451 INFO L225 Difference]: With dead ends: 66 [2019-09-08 02:46:02,451 INFO L226 Difference]: Without dead ends: 61 [2019-09-08 02:46:02,452 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 92 SyntacticMatches, 16 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=148, Invalid=2014, Unknown=0, NotChecked=0, Total=2162 [2019-09-08 02:46:02,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-08 02:46:02,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2019-09-08 02:46:02,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-08 02:46:02,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2019-09-08 02:46:02,459 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 94 [2019-09-08 02:46:02,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:46:02,460 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2019-09-08 02:46:02,460 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-08 02:46:02,460 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2019-09-08 02:46:02,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-08 02:46:02,461 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:46:02,461 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:46:02,462 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:46:02,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:46:02,462 INFO L82 PathProgramCache]: Analyzing trace with hash 124031738, now seen corresponding path program 15 times [2019-09-08 02:46:02,462 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:46:02,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:46:02,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:46:02,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:46:02,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:46:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:46:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-09-08 02:46:03,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:46:03,127 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 [2019-09-08 02:46:03,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 02:48:29,683 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-08 02:48:29,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:48:29,932 WARN L254 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 153 conjunts are in the unsatisfiable core [2019-09-08 02:48:29,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:48:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (16)] Exception during sending of exit command (exit): Stream Closed [2019-09-08 02:48:30,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:48:30,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-09-08 02:48:30,134 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-08 02:48:30,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-08 02:48:30,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1107, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 02:48:30,135 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 35 states. [2019-09-08 02:48:31,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:48:31,628 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2019-09-08 02:48:31,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 02:48:31,629 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 100 [2019-09-08 02:48:31,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:48:31,631 INFO L225 Difference]: With dead ends: 69 [2019-09-08 02:48:31,631 INFO L226 Difference]: Without dead ends: 64 [2019-09-08 02:48:31,632 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 98 SyntacticMatches, 17 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=158, Invalid=2292, Unknown=0, NotChecked=0, Total=2450 [2019-09-08 02:48:31,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-08 02:48:31,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-09-08 02:48:31,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-09-08 02:48:31,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2019-09-08 02:48:31,639 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 100 [2019-09-08 02:48:31,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:48:31,639 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2019-09-08 02:48:31,639 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-08 02:48:31,639 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2019-09-08 02:48:31,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-08 02:48:31,641 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:48:31,641 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:48:31,641 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:48:31,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:48:31,641 INFO L82 PathProgramCache]: Analyzing trace with hash 216947736, now seen corresponding path program 16 times [2019-09-08 02:48:31,642 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:48:31,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:48:31,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:48:31,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:48:31,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:48:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:48:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2019-09-08 02:48:32,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:48:32,360 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 [2019-09-08 02:48:32,372 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 02:48:32,408 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 02:48:32,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:48:32,411 WARN L254 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 163 conjunts are in the unsatisfiable core [2019-09-08 02:48:32,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:48:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2019-09-08 02:48:32,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:48:32,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-09-08 02:48:32,549 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-08 02:48:32,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-08 02:48:32,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2019-09-08 02:48:32,550 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand 37 states. [2019-09-08 02:48:34,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:48:34,125 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2019-09-08 02:48:34,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 02:48:34,126 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 106 [2019-09-08 02:48:34,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:48:34,127 INFO L225 Difference]: With dead ends: 72 [2019-09-08 02:48:34,127 INFO L226 Difference]: Without dead ends: 67 [2019-09-08 02:48:34,128 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 104 SyntacticMatches, 18 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=168, Invalid=2588, Unknown=0, NotChecked=0, Total=2756 [2019-09-08 02:48:34,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-08 02:48:34,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-09-08 02:48:34,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-08 02:48:34,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2019-09-08 02:48:34,135 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 106 [2019-09-08 02:48:34,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:48:34,135 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2019-09-08 02:48:34,135 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-08 02:48:34,135 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2019-09-08 02:48:34,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-08 02:48:34,136 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:48:34,137 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:48:34,137 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:48:34,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:48:34,137 INFO L82 PathProgramCache]: Analyzing trace with hash -13085002, now seen corresponding path program 17 times [2019-09-08 02:48:34,137 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:48:34,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:48:34,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:48:34,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:48:34,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:48:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:48:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-09-08 02:48:35,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:48:35,155 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 [2019-09-08 02:48:35,169 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 02:50:21,683 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-08 02:50:21,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:50:21,918 WARN L254 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 173 conjunts are in the unsatisfiable core [2019-09-08 02:50:21,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:50:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-09-08 02:50:22,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:50:22,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-09-08 02:50:22,151 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-08 02:50:22,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-08 02:50:22,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2019-09-08 02:50:22,153 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand 39 states. [2019-09-08 02:50:24,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:50:24,212 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2019-09-08 02:50:24,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-08 02:50:24,213 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 112 [2019-09-08 02:50:24,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:50:24,215 INFO L225 Difference]: With dead ends: 75 [2019-09-08 02:50:24,215 INFO L226 Difference]: Without dead ends: 70 [2019-09-08 02:50:24,217 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 110 SyntacticMatches, 19 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=178, Invalid=2902, Unknown=0, NotChecked=0, Total=3080 [2019-09-08 02:50:24,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-08 02:50:24,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2019-09-08 02:50:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-08 02:50:24,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2019-09-08 02:50:24,226 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 112 [2019-09-08 02:50:24,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:50:24,227 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2019-09-08 02:50:24,227 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-08 02:50:24,227 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2019-09-08 02:50:24,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-09-08 02:50:24,228 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:50:24,228 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:50:24,228 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:50:24,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:50:24,229 INFO L82 PathProgramCache]: Analyzing trace with hash -759733548, now seen corresponding path program 18 times [2019-09-08 02:50:24,229 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:50:24,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:50:24,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:50:24,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:50:24,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:50:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:50:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2019-09-08 02:50:25,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:50:25,235 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 [2019-09-08 02:50:25,246 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 02:51:19,996 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-08 02:51:19,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:51:20,134 WARN L254 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 184 conjunts are in the unsatisfiable core [2019-09-08 02:51:20,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:51:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2019-09-08 02:51:20,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:51:20,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-09-08 02:51:20,308 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-08 02:51:20,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-08 02:51:20,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1542, Unknown=0, NotChecked=0, Total=1640 [2019-09-08 02:51:20,309 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand 41 states. [2019-09-08 02:51:22,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:51:22,284 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2019-09-08 02:51:22,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-09-08 02:51:22,285 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 118 [2019-09-08 02:51:22,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:51:22,286 INFO L225 Difference]: With dead ends: 78 [2019-09-08 02:51:22,286 INFO L226 Difference]: Without dead ends: 73 [2019-09-08 02:51:22,288 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 115 SyntacticMatches, 21 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=188, Invalid=3234, Unknown=0, NotChecked=0, Total=3422 [2019-09-08 02:51:22,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-08 02:51:22,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2019-09-08 02:51:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-08 02:51:22,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2019-09-08 02:51:22,293 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 118 [2019-09-08 02:51:22,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:51:22,294 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2019-09-08 02:51:22,294 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-08 02:51:22,294 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2019-09-08 02:51:22,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-09-08 02:51:22,295 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:51:22,296 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:51:22,296 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:51:22,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:51:22,296 INFO L82 PathProgramCache]: Analyzing trace with hash -927440782, now seen corresponding path program 19 times [2019-09-08 02:51:22,296 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:51:22,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:51:22,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:51:22,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:51:22,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:51:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:51:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2019-09-08 02:51:23,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:51:23,233 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 [2019-09-08 02:51:23,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 02:51:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:51:23,302 WARN L254 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 193 conjunts are in the unsatisfiable core [2019-09-08 02:51:23,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:51:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2019-09-08 02:51:23,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:51:23,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-09-08 02:51:23,456 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-08 02:51:23,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-08 02:51:23,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1703, Unknown=0, NotChecked=0, Total=1806 [2019-09-08 02:51:23,457 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand 43 states. [2019-09-08 02:51:25,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:51:25,691 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2019-09-08 02:51:25,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-08 02:51:25,691 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 124 [2019-09-08 02:51:25,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:51:25,693 INFO L225 Difference]: With dead ends: 81 [2019-09-08 02:51:25,693 INFO L226 Difference]: Without dead ends: 76 [2019-09-08 02:51:25,695 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 122 SyntacticMatches, 21 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=198, Invalid=3584, Unknown=0, NotChecked=0, Total=3782 [2019-09-08 02:51:25,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-08 02:51:25,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2019-09-08 02:51:25,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-09-08 02:51:25,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2019-09-08 02:51:25,700 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 124 [2019-09-08 02:51:25,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:51:25,700 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2019-09-08 02:51:25,700 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-08 02:51:25,701 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2019-09-08 02:51:25,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-09-08 02:51:25,701 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:51:25,702 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:51:25,702 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:51:25,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:51:25,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1835020176, now seen corresponding path program 20 times [2019-09-08 02:51:25,702 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:51:25,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:51:25,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:51:25,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 02:51:25,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:51:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:51:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2019-09-08 02:51:26,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:51:26,717 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 [2019-09-08 02:51:26,728 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 02:51:26,772 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 02:51:26,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:51:26,776 WARN L254 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 203 conjunts are in the unsatisfiable core [2019-09-08 02:51:26,779 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:51:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2019-09-08 02:51:26,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:51:26,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-09-08 02:51:26,973 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-08 02:51:26,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-08 02:51:26,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1872, Unknown=0, NotChecked=0, Total=1980 [2019-09-08 02:51:26,975 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand 45 states. [2019-09-08 02:51:29,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:51:29,290 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2019-09-08 02:51:29,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-08 02:51:29,293 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 130 [2019-09-08 02:51:29,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:51:29,294 INFO L225 Difference]: With dead ends: 84 [2019-09-08 02:51:29,294 INFO L226 Difference]: Without dead ends: 79 [2019-09-08 02:51:29,296 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 128 SyntacticMatches, 22 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=208, Invalid=3952, Unknown=0, NotChecked=0, Total=4160 [2019-09-08 02:51:29,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-08 02:51:29,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-09-08 02:51:29,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-08 02:51:29,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2019-09-08 02:51:29,302 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 130 [2019-09-08 02:51:29,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:51:29,303 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2019-09-08 02:51:29,303 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-08 02:51:29,303 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2019-09-08 02:51:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-08 02:51:29,304 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:51:29,304 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:51:29,305 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:51:29,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:51:29,305 INFO L82 PathProgramCache]: Analyzing trace with hash 363573294, now seen corresponding path program 21 times [2019-09-08 02:51:29,305 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:51:29,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:51:29,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:51:29,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:51:29,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:51:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:51:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-09-08 02:51:30,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:51:30,447 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 [2019-09-08 02:51:30,457 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 02:54:03,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-08 02:54:03,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:54:04,247 WARN L254 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 219 conjunts are in the unsatisfiable core [2019-09-08 02:54:04,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:54:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-09-08 02:54:04,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:54:04,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2019-09-08 02:54:04,421 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-08 02:54:04,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-08 02:54:04,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2049, Unknown=0, NotChecked=0, Total=2162 [2019-09-08 02:54:04,423 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand 47 states. [2019-09-08 02:54:06,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:54:06,893 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2019-09-08 02:54:06,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-08 02:54:06,893 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 136 [2019-09-08 02:54:06,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:54:06,895 INFO L225 Difference]: With dead ends: 87 [2019-09-08 02:54:06,895 INFO L226 Difference]: Without dead ends: 82 [2019-09-08 02:54:06,898 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 133 SyntacticMatches, 24 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=218, Invalid=4338, Unknown=0, NotChecked=0, Total=4556 [2019-09-08 02:54:06,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-09-08 02:54:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2019-09-08 02:54:06,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-09-08 02:54:06,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2019-09-08 02:54:06,903 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 136 [2019-09-08 02:54:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:54:06,903 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2019-09-08 02:54:06,903 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-08 02:54:06,903 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2019-09-08 02:54:06,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-09-08 02:54:06,905 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:54:06,905 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:54:06,905 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:54:06,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:54:06,905 INFO L82 PathProgramCache]: Analyzing trace with hash -579878324, now seen corresponding path program 22 times [2019-09-08 02:54:06,906 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:54:06,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:54:06,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:54:06,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:54:06,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:54:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:54:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2019-09-08 02:54:08,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:54:08,621 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) [2019-09-08 02:54:08,643 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 [2019-09-08 02:54:08,695 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 02:54:08,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:54:08,699 WARN L254 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 223 conjunts are in the unsatisfiable core [2019-09-08 02:54:08,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:54:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (23)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 02:54:08,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:54:08,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2019-09-08 02:54:08,888 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-09-08 02:54:08,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-09-08 02:54:08,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2234, Unknown=0, NotChecked=0, Total=2352 [2019-09-08 02:54:08,889 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand 49 states. [2019-09-08 02:54:11,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:54:11,596 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2019-09-08 02:54:11,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-09-08 02:54:11,597 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 142 [2019-09-08 02:54:11,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:54:11,598 INFO L225 Difference]: With dead ends: 90 [2019-09-08 02:54:11,598 INFO L226 Difference]: Without dead ends: 85 [2019-09-08 02:54:11,601 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 140 SyntacticMatches, 24 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=228, Invalid=4742, Unknown=0, NotChecked=0, Total=4970 [2019-09-08 02:54:11,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-08 02:54:11,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-09-08 02:54:11,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-08 02:54:11,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2019-09-08 02:54:11,607 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 142 [2019-09-08 02:54:11,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:54:11,607 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2019-09-08 02:54:11,607 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-09-08 02:54:11,607 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2019-09-08 02:54:11,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-09-08 02:54:11,609 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:54:11,609 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:54:11,609 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:54:11,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:54:11,609 INFO L82 PathProgramCache]: Analyzing trace with hash 626607594, now seen corresponding path program 23 times [2019-09-08 02:54:11,609 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:54:11,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:54:11,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:54:11,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:54:11,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:54:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:54:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2019-09-08 02:54:13,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:54:13,115 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 [2019-09-08 02:54:13,125 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1