java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 09:48:57,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 09:48:57,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 09:48:57,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 09:48:57,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 09:48:57,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 09:48:57,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 09:48:57,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 09:48:57,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 09:48:57,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 09:48:57,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 09:48:57,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 09:48:57,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 09:48:57,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 09:48:57,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 09:48:57,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 09:48:57,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 09:48:57,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 09:48:57,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 09:48:57,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 09:48:57,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 09:48:57,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 09:48:57,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 09:48:57,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 09:48:57,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 09:48:57,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 09:48:57,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 09:48:57,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 09:48:57,889 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-07 09:48:57,903 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 09:48:57,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 09:48:57,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 09:48:57,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 09:48:57,905 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 09:48:57,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 09:48:57,905 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 09:48:57,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 09:48:57,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 09:48:57,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 09:48:57,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 09:48:57,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 09:48:57,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 09:48:57,907 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 09:48:57,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 09:48:57,907 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 09:48:57,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 09:48:57,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 09:48:57,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 09:48:57,908 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 09:48:57,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 09:48:57,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 09:48:57,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 09:48:57,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 09:48:57,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 09:48:57,909 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 09:48:57,909 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 09:48:57,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 09:48:57,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 09:48:57,937 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 09:48:57,950 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 09:48:57,954 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 09:48:57,955 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 09:48:57,956 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 09:48:57,957 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i [2019-09-07 09:48:58,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/561670333/f2553f071dd94cbd8c44434dc922e448/FLAG18013e0b4 [2019-09-07 09:48:58,519 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 09:48:58,520 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i [2019-09-07 09:48:58,526 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/561670333/f2553f071dd94cbd8c44434dc922e448/FLAG18013e0b4 [2019-09-07 09:48:58,866 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/561670333/f2553f071dd94cbd8c44434dc922e448 [2019-09-07 09:48:58,883 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 09:48:58,885 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 09:48:58,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 09:48:58,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 09:48:58,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 09:48:58,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:48:58" (1/1) ... [2019-09-07 09:48:58,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42c92838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:48:58, skipping insertion in model container [2019-09-07 09:48:58,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:48:58" (1/1) ... [2019-09-07 09:48:58,903 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 09:48:58,921 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 09:48:59,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:48:59,131 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 09:48:59,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:48:59,174 INFO L192 MainTranslator]: Completed translation [2019-09-07 09:48:59,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:48:59 WrapperNode [2019-09-07 09:48:59,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 09:48:59,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 09:48:59,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 09:48:59,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 09:48:59,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:48:59" (1/1) ... [2019-09-07 09:48:59,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:48:59" (1/1) ... [2019-09-07 09:48:59,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:48:59" (1/1) ... [2019-09-07 09:48:59,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:48:59" (1/1) ... [2019-09-07 09:48:59,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:48:59" (1/1) ... [2019-09-07 09:48:59,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:48:59" (1/1) ... [2019-09-07 09:48:59,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:48:59" (1/1) ... [2019-09-07 09:48:59,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 09:48:59,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 09:48:59,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 09:48:59,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 09:48:59,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:48:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 09:48:59,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 09:48:59,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 09:48:59,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 09:48:59,366 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 09:48:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 09:48:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 09:48:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 09:48:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 09:48:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 09:48:59,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 09:48:59,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 09:48:59,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 09:48:59,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 09:48:59,651 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 09:48:59,651 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-07 09:48:59,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:48:59 BoogieIcfgContainer [2019-09-07 09:48:59,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 09:48:59,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 09:48:59,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 09:48:59,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 09:48:59,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 09:48:58" (1/3) ... [2019-09-07 09:48:59,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a104c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:48:59, skipping insertion in model container [2019-09-07 09:48:59,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:48:59" (2/3) ... [2019-09-07 09:48:59,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a104c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:48:59, skipping insertion in model container [2019-09-07 09:48:59,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:48:59" (3/3) ... [2019-09-07 09:48:59,661 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum3_ground.i [2019-09-07 09:48:59,674 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 09:48:59,681 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 09:48:59,697 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 09:48:59,728 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 09:48:59,729 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 09:48:59,729 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 09:48:59,730 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 09:48:59,730 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 09:48:59,730 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 09:48:59,730 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 09:48:59,730 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 09:48:59,730 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 09:48:59,747 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-09-07 09:48:59,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-07 09:48:59,753 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:48:59,754 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:48:59,756 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:48:59,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:48:59,761 INFO L82 PathProgramCache]: Analyzing trace with hash 656367922, now seen corresponding path program 1 times [2019-09-07 09:48:59,763 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:48:59,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:48:59,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:59,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:48:59,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:48:59,914 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:48:59,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 09:48:59,918 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 09:48:59,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 09:48:59,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:48:59,930 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-09-07 09:48:59,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:48:59,957 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2019-09-07 09:48:59,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 09:48:59,959 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2019-09-07 09:48:59,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:48:59,968 INFO L225 Difference]: With dead ends: 57 [2019-09-07 09:48:59,969 INFO L226 Difference]: Without dead ends: 27 [2019-09-07 09:48:59,973 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:48:59,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-07 09:49:00,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-07 09:49:00,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-07 09:49:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-09-07 09:49:00,020 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-09-07 09:49:00,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:49:00,021 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-09-07 09:49:00,021 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 09:49:00,022 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-09-07 09:49:00,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-07 09:49:00,023 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:49:00,023 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:49:00,023 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:49:00,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:49:00,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1829979950, now seen corresponding path program 1 times [2019-09-07 09:49:00,024 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:49:00,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:49:00,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:00,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:49:00,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:49:00,126 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:49:00,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:49:00,129 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:49:00,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:49:00,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:49:00,130 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-09-07 09:49:00,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:49:00,252 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2019-09-07 09:49:00,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:49:00,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-09-07 09:49:00,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:49:00,255 INFO L225 Difference]: With dead ends: 54 [2019-09-07 09:49:00,256 INFO L226 Difference]: Without dead ends: 34 [2019-09-07 09:49:00,258 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:49:00,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-07 09:49:00,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2019-09-07 09:49:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-07 09:49:00,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-09-07 09:49:00,275 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 19 [2019-09-07 09:49:00,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:49:00,276 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-09-07 09:49:00,276 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:49:00,276 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-09-07 09:49:00,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-07 09:49:00,279 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:49:00,279 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:49:00,280 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:49:00,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:49:00,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1442018896, now seen corresponding path program 1 times [2019-09-07 09:49:00,280 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:49:00,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:49:00,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:00,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:49:00,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-07 09:49:00,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:49:00,399 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:49:00,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:49:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:00,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:49:00,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:49:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:49:00,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:49:00,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:49:00,508 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:49:00,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:49:00,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:49:00,509 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 5 states. [2019-09-07 09:49:00,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:49:00,597 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2019-09-07 09:49:00,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:49:00,598 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-09-07 09:49:00,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:49:00,599 INFO L225 Difference]: With dead ends: 64 [2019-09-07 09:49:00,599 INFO L226 Difference]: Without dead ends: 41 [2019-09-07 09:49:00,600 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:49:00,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-07 09:49:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-09-07 09:49:00,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-07 09:49:00,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-09-07 09:49:00,607 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 26 [2019-09-07 09:49:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:49:00,608 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-09-07 09:49:00,608 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:49:00,608 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-09-07 09:49:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-07 09:49:00,609 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:49:00,610 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:49:00,610 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:49:00,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:49:00,611 INFO L82 PathProgramCache]: Analyzing trace with hash 261695650, now seen corresponding path program 2 times [2019-09-07 09:49:00,611 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:49:00,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:49:00,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:00,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:49:00,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-07 09:49:00,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:49:00,719 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:49:00,738 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:49:00,771 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:49:00,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:49:00,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 09:49:00,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:49:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-07 09:49:00,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:49:00,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-07 09:49:00,801 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 09:49:00,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 09:49:00,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 09:49:00,802 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 6 states. [2019-09-07 09:49:00,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:49:00,914 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2019-09-07 09:49:00,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 09:49:00,915 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-09-07 09:49:00,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:49:00,916 INFO L225 Difference]: With dead ends: 77 [2019-09-07 09:49:00,916 INFO L226 Difference]: Without dead ends: 48 [2019-09-07 09:49:00,917 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 09:49:00,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-07 09:49:00,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2019-09-07 09:49:00,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-07 09:49:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-09-07 09:49:00,926 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 33 [2019-09-07 09:49:00,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:49:00,927 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-09-07 09:49:00,927 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 09:49:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-09-07 09:49:00,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-07 09:49:00,928 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:49:00,940 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:49:00,943 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:49:00,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:49:00,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1563249348, now seen corresponding path program 3 times [2019-09-07 09:49:00,945 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:49:00,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:49:00,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:00,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:49:00,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-09-07 09:49:01,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:49:01,030 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) [2019-09-07 09:49:01,046 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 [2019-09-07 09:49:01,095 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 09:49:01,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:49:01,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:49:01,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:49:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-09-07 09:49:01,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:49:01,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 09:49:01,128 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:49:01,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:49:01,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:49:01,129 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 7 states. [2019-09-07 09:49:01,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:49:01,249 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2019-09-07 09:49:01,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 09:49:01,250 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2019-09-07 09:49:01,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:49:01,251 INFO L225 Difference]: With dead ends: 90 [2019-09-07 09:49:01,251 INFO L226 Difference]: Without dead ends: 55 [2019-09-07 09:49:01,252 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:49:01,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-07 09:49:01,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2019-09-07 09:49:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-07 09:49:01,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2019-09-07 09:49:01,260 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 40 [2019-09-07 09:49:01,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:49:01,260 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2019-09-07 09:49:01,261 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:49:01,261 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2019-09-07 09:49:01,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-07 09:49:01,262 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:49:01,262 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:49:01,263 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:49:01,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:49:01,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1161905130, now seen corresponding path program 4 times [2019-09-07 09:49:01,263 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:49:01,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:49:01,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:01,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:49:01,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-09-07 09:49:01,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:49:01,400 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) [2019-09-07 09:49:01,416 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 [2019-09-07 09:49:01,449 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:49:01,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:49:01,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 09:49:01,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:49:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-09-07 09:49:01,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:49:01,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-07 09:49:01,487 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 09:49:01,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 09:49:01,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:49:01,488 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 8 states. [2019-09-07 09:49:01,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:49:01,632 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2019-09-07 09:49:01,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 09:49:01,633 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2019-09-07 09:49:01,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:49:01,639 INFO L225 Difference]: With dead ends: 103 [2019-09-07 09:49:01,640 INFO L226 Difference]: Without dead ends: 62 [2019-09-07 09:49:01,641 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:49:01,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-07 09:49:01,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2019-09-07 09:49:01,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-07 09:49:01,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2019-09-07 09:49:01,653 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 47 [2019-09-07 09:49:01,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:49:01,653 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2019-09-07 09:49:01,653 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 09:49:01,653 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2019-09-07 09:49:01,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-07 09:49:01,657 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:49:01,657 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:49:01,658 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:49:01,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:49:01,658 INFO L82 PathProgramCache]: Analyzing trace with hash 104059192, now seen corresponding path program 5 times [2019-09-07 09:49:01,661 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:49:01,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:49:01,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:01,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:49:01,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-09-07 09:49:01,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:49:01,809 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:49:01,823 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:49:02,434 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-07 09:49:02,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:49:02,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 09:49:02,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:49:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-09-07 09:49:02,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:49:02,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-07 09:49:02,465 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 09:49:02,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 09:49:02,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 09:49:02,466 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 9 states. [2019-09-07 09:49:02,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:49:02,613 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2019-09-07 09:49:02,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 09:49:02,614 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2019-09-07 09:49:02,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:49:02,615 INFO L225 Difference]: With dead ends: 116 [2019-09-07 09:49:02,615 INFO L226 Difference]: Without dead ends: 69 [2019-09-07 09:49:02,616 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 09:49:02,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-07 09:49:02,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2019-09-07 09:49:02,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-07 09:49:02,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-09-07 09:49:02,624 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 54 [2019-09-07 09:49:02,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:49:02,625 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-09-07 09:49:02,625 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 09:49:02,625 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-09-07 09:49:02,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-07 09:49:02,626 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:49:02,627 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:49:02,627 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:49:02,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:49:02,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1385759114, now seen corresponding path program 6 times [2019-09-07 09:49:02,628 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:49:02,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:49:02,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:02,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:49:02,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-09-07 09:49:02,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:49:02,750 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:49:02,769 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:49:03,383 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-07 09:49:03,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:49:03,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:49:03,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:49:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-09-07 09:49:03,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:49:03,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-07 09:49:03,440 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 09:49:03,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 09:49:03,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:49:03,441 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 10 states. [2019-09-07 09:49:03,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:49:03,567 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2019-09-07 09:49:03,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 09:49:03,568 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2019-09-07 09:49:03,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:49:03,569 INFO L225 Difference]: With dead ends: 129 [2019-09-07 09:49:03,569 INFO L226 Difference]: Without dead ends: 76 [2019-09-07 09:49:03,570 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:49:03,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-07 09:49:03,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2019-09-07 09:49:03,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-09-07 09:49:03,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-09-07 09:49:03,580 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 61 [2019-09-07 09:49:03,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:49:03,580 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-09-07 09:49:03,581 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 09:49:03,581 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-09-07 09:49:03,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-07 09:49:03,585 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:49:03,585 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:49:03,586 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:49:03,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:49:03,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1895565740, now seen corresponding path program 7 times [2019-09-07 09:49:03,586 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:49:03,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:49:03,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:03,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:49:03,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-09-07 09:49:03,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:49:03,722 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:49:03,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:49:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:03,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 09:49:03,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:49:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-09-07 09:49:03,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:49:03,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-07 09:49:03,816 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 09:49:03,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 09:49:03,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:49:03,817 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 11 states. [2019-09-07 09:49:03,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:49:03,955 INFO L93 Difference]: Finished difference Result 142 states and 153 transitions. [2019-09-07 09:49:03,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 09:49:03,956 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2019-09-07 09:49:03,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:49:03,957 INFO L225 Difference]: With dead ends: 142 [2019-09-07 09:49:03,957 INFO L226 Difference]: Without dead ends: 83 [2019-09-07 09:49:03,958 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:49:03,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-09-07 09:49:03,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2019-09-07 09:49:03,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-09-07 09:49:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-09-07 09:49:03,966 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 68 [2019-09-07 09:49:03,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:49:03,966 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-09-07 09:49:03,966 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 09:49:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-09-07 09:49:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-07 09:49:03,967 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:49:03,967 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:49:03,968 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:49:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:49:03,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1749223170, now seen corresponding path program 8 times [2019-09-07 09:49:03,968 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:49:03,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:49:03,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:03,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:49:03,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-09-07 09:49:04,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:49:04,074 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:49:04,091 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:49:04,130 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:49:04,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:49:04,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 09:49:04,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:49:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:49:04,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:49:04,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-07 09:49:04,181 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:49:04,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:49:04,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:49:04,182 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 12 states. [2019-09-07 09:49:04,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:49:04,334 INFO L93 Difference]: Finished difference Result 155 states and 166 transitions. [2019-09-07 09:49:04,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 09:49:04,334 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2019-09-07 09:49:04,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:49:04,335 INFO L225 Difference]: With dead ends: 155 [2019-09-07 09:49:04,335 INFO L226 Difference]: Without dead ends: 90 [2019-09-07 09:49:04,336 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:49:04,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-09-07 09:49:04,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2019-09-07 09:49:04,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-07 09:49:04,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-09-07 09:49:04,344 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 75 [2019-09-07 09:49:04,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:49:04,345 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-09-07 09:49:04,345 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:49:04,345 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-09-07 09:49:04,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-07 09:49:04,346 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:49:04,346 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:49:04,347 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:49:04,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:49:04,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1643836448, now seen corresponding path program 9 times [2019-09-07 09:49:04,347 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:49:04,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:49:04,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:04,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:49:04,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-09-07 09:49:04,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:49:04,487 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:49:04,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:49:05,102 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-07 09:49:05,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:49:05,105 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:49:05,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:49:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-09-07 09:49:05,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:49:05,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-07 09:49:05,134 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 09:49:05,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 09:49:05,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 09:49:05,135 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 13 states. [2019-09-07 09:49:05,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:49:05,280 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2019-09-07 09:49:05,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 09:49:05,281 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2019-09-07 09:49:05,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:49:05,282 INFO L225 Difference]: With dead ends: 168 [2019-09-07 09:49:05,282 INFO L226 Difference]: Without dead ends: 97 [2019-09-07 09:49:05,283 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 09:49:05,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-07 09:49:05,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2019-09-07 09:49:05,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-07 09:49:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2019-09-07 09:49:05,290 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 82 [2019-09-07 09:49:05,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:49:05,290 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2019-09-07 09:49:05,290 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 09:49:05,290 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2019-09-07 09:49:05,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-09-07 09:49:05,291 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:49:05,292 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:49:05,292 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:49:05,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:49:05,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1732223602, now seen corresponding path program 10 times [2019-09-07 09:49:05,292 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:49:05,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:49:05,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:05,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:49:05,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-09-07 09:49:05,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:49:05,413 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:49:05,429 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:49:05,473 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:49:05,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:49:05,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 09:49:05,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:49:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2019-09-07 09:49:05,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:49:05,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-07 09:49:05,531 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 09:49:05,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 09:49:05,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 09:49:05,532 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 14 states. [2019-09-07 09:49:05,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:49:05,699 INFO L93 Difference]: Finished difference Result 181 states and 192 transitions. [2019-09-07 09:49:05,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 09:49:05,699 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2019-09-07 09:49:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:49:05,700 INFO L225 Difference]: With dead ends: 181 [2019-09-07 09:49:05,701 INFO L226 Difference]: Without dead ends: 104 [2019-09-07 09:49:05,701 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 09:49:05,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-07 09:49:05,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2019-09-07 09:49:05,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-07 09:49:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-09-07 09:49:05,707 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 89 [2019-09-07 09:49:05,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:49:05,708 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-09-07 09:49:05,708 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 09:49:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-09-07 09:49:05,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-07 09:49:05,709 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:49:05,709 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:49:05,709 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:49:05,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:49:05,710 INFO L82 PathProgramCache]: Analyzing trace with hash -2111467372, now seen corresponding path program 11 times [2019-09-07 09:49:05,710 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:49:05,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:49:05,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:05,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:49:05,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2019-09-07 09:49:05,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:49:05,847 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 [2019-09-07 09:49:05,862 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:49:50,530 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-07 09:49:50,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:49:50,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 09:49:50,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:49:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2019-09-07 09:49:50,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:49:50,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 09:49:50,627 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:49:50,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:49:50,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:49:50,628 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 15 states. [2019-09-07 09:49:50,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:49:50,810 INFO L93 Difference]: Finished difference Result 194 states and 205 transitions. [2019-09-07 09:49:50,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 09:49:50,811 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96 [2019-09-07 09:49:50,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:49:50,812 INFO L225 Difference]: With dead ends: 194 [2019-09-07 09:49:50,812 INFO L226 Difference]: Without dead ends: 111 [2019-09-07 09:49:50,813 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:49:50,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-09-07 09:49:50,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2019-09-07 09:49:50,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-09-07 09:49:50,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2019-09-07 09:49:50,819 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 96 [2019-09-07 09:49:50,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:49:50,819 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2019-09-07 09:49:50,819 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:49:50,819 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2019-09-07 09:49:50,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-07 09:49:50,820 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:49:50,820 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:49:50,821 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:49:50,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:49:50,821 INFO L82 PathProgramCache]: Analyzing trace with hash -88736282, now seen corresponding path program 12 times [2019-09-07 09:49:50,821 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:49:50,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:49:50,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:50,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:49:50,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2019-09-07 09:49:51,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:49:51,010 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) [2019-09-07 09:49:51,034 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:50:30,397 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-07 09:50:30,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:50:30,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 48 conjunts are in the unsatisfiable core [2019-09-07 09:50:30,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:50:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 35 proven. 144 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-09-07 09:50:30,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:50:30,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 18 [2019-09-07 09:50:30,550 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-07 09:50:30,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-07 09:50:30,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 09:50:30,551 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 18 states. [2019-09-07 09:50:30,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:50:30,804 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2019-09-07 09:50:30,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 09:50:30,805 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 103 [2019-09-07 09:50:30,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:50:30,806 INFO L225 Difference]: With dead ends: 211 [2019-09-07 09:50:30,806 INFO L226 Difference]: Without dead ends: 122 [2019-09-07 09:50:30,809 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 09:50:30,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-09-07 09:50:30,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2019-09-07 09:50:30,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-09-07 09:50:30,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2019-09-07 09:50:30,817 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 103 [2019-09-07 09:50:30,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:50:30,817 INFO L475 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2019-09-07 09:50:30,817 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-07 09:50:30,817 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2019-09-07 09:50:30,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-09-07 09:50:30,821 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:50:30,821 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:50:30,822 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:50:30,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:50:30,822 INFO L82 PathProgramCache]: Analyzing trace with hash 674564954, now seen corresponding path program 13 times [2019-09-07 09:50:30,823 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:50:30,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:50:30,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:30,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:50:30,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:50:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-09-07 09:50:31,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:50:31,065 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:50:31,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:50:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:50:31,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 09:50:31,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:50:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-09-07 09:50:31,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:50:31,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-09-07 09:50:31,174 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-07 09:50:31,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-07 09:50:31,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 09:50:31,175 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 18 states. [2019-09-07 09:50:31,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:50:31,427 INFO L93 Difference]: Finished difference Result 233 states and 244 transitions. [2019-09-07 09:50:31,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 09:50:31,428 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 117 [2019-09-07 09:50:31,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:50:31,429 INFO L225 Difference]: With dead ends: 233 [2019-09-07 09:50:31,429 INFO L226 Difference]: Without dead ends: 132 [2019-09-07 09:50:31,430 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 09:50:31,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-09-07 09:50:31,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2019-09-07 09:50:31,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-09-07 09:50:31,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2019-09-07 09:50:31,436 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 117 [2019-09-07 09:50:31,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:50:31,437 INFO L475 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2019-09-07 09:50:31,437 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-07 09:50:31,437 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2019-09-07 09:50:31,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-09-07 09:50:31,438 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:50:31,439 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:50:31,439 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:50:31,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:50:31,439 INFO L82 PathProgramCache]: Analyzing trace with hash -363733124, now seen corresponding path program 14 times [2019-09-07 09:50:31,439 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:50:31,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:50:31,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:31,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:50:31,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:50:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2019-09-07 09:50:31,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:50:31,664 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-07 09:50:31,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:50:31,754 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:50:31,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:50:31,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 09:50:31,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:50:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2019-09-07 09:50:31,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:50:31,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-07 09:50:31,790 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 09:50:31,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 09:50:31,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:50:31,793 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand 19 states. [2019-09-07 09:50:32,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:50:32,064 INFO L93 Difference]: Finished difference Result 246 states and 257 transitions. [2019-09-07 09:50:32,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 09:50:32,066 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 124 [2019-09-07 09:50:32,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:50:32,067 INFO L225 Difference]: With dead ends: 246 [2019-09-07 09:50:32,067 INFO L226 Difference]: Without dead ends: 139 [2019-09-07 09:50:32,068 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:50:32,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-09-07 09:50:32,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2019-09-07 09:50:32,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-09-07 09:50:32,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2019-09-07 09:50:32,073 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 124 [2019-09-07 09:50:32,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:50:32,074 INFO L475 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2019-09-07 09:50:32,074 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 09:50:32,074 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2019-09-07 09:50:32,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-09-07 09:50:32,075 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:50:32,076 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:50:32,076 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:50:32,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:50:32,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1571697970, now seen corresponding path program 15 times [2019-09-07 09:50:32,076 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:50:32,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:50:32,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:32,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:50:32,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:50:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2019-09-07 09:50:32,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:50:32,310 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:50:32,326 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:50:40,555 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-07 09:50:40,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:50:40,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:50:40,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:50:40,621 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2019-09-07 09:50:40,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:50:40,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 09:50:40,638 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 09:50:40,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 09:50:40,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:50:40,639 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 20 states. [2019-09-07 09:50:40,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:50:40,907 INFO L93 Difference]: Finished difference Result 259 states and 270 transitions. [2019-09-07 09:50:40,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 09:50:40,908 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 131 [2019-09-07 09:50:40,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:50:40,909 INFO L225 Difference]: With dead ends: 259 [2019-09-07 09:50:40,909 INFO L226 Difference]: Without dead ends: 146 [2019-09-07 09:50:40,910 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:50:40,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-09-07 09:50:40,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2019-09-07 09:50:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-09-07 09:50:40,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2019-09-07 09:50:40,916 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 131 [2019-09-07 09:50:40,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:50:40,916 INFO L475 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2019-09-07 09:50:40,917 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 09:50:40,917 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2019-09-07 09:50:40,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-09-07 09:50:40,918 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:50:40,918 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:50:40,919 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:50:40,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:50:40,919 INFO L82 PathProgramCache]: Analyzing trace with hash 985502192, now seen corresponding path program 16 times [2019-09-07 09:50:40,919 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:50:40,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:50:40,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:40,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:50:40,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:50:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 867 trivial. 0 not checked. [2019-09-07 09:50:41,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:50:41,207 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:50:41,226 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:50:41,303 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:50:41,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:50:41,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 09:50:41,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:50:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2019-09-07 09:50:41,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:50:41,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-09-07 09:50:41,347 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 09:50:41,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 09:50:41,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:50:41,348 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand 21 states. [2019-09-07 09:50:41,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:50:41,583 INFO L93 Difference]: Finished difference Result 272 states and 283 transitions. [2019-09-07 09:50:41,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 09:50:41,585 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 138 [2019-09-07 09:50:41,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:50:41,586 INFO L225 Difference]: With dead ends: 272 [2019-09-07 09:50:41,586 INFO L226 Difference]: Without dead ends: 153 [2019-09-07 09:50:41,587 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:50:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-09-07 09:50:41,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2019-09-07 09:50:41,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-09-07 09:50:41,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2019-09-07 09:50:41,599 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 138 [2019-09-07 09:50:41,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:50:41,599 INFO L475 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2019-09-07 09:50:41,599 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 09:50:41,600 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2019-09-07 09:50:41,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-09-07 09:50:41,601 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:50:41,601 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:50:41,602 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:50:41,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:50:41,602 INFO L82 PathProgramCache]: Analyzing trace with hash 941702210, now seen corresponding path program 17 times [2019-09-07 09:50:41,602 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:50:41,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:50:41,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:41,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:50:41,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:50:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2019-09-07 09:50:41,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:50:41,911 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:50:41,924 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:52:32,117 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-09-07 09:52:32,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:52:32,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 09:52:32,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:52:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2019-09-07 09:52:32,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:52:32,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-09-07 09:52:32,258 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 09:52:32,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 09:52:32,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:52:32,259 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 22 states. [2019-09-07 09:52:32,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:52:32,520 INFO L93 Difference]: Finished difference Result 285 states and 296 transitions. [2019-09-07 09:52:32,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 09:52:32,521 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 145 [2019-09-07 09:52:32,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:52:32,522 INFO L225 Difference]: With dead ends: 285 [2019-09-07 09:52:32,522 INFO L226 Difference]: Without dead ends: 160 [2019-09-07 09:52:32,523 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:52:32,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-09-07 09:52:32,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2019-09-07 09:52:32,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-09-07 09:52:32,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2019-09-07 09:52:32,530 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 145 [2019-09-07 09:52:32,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:52:32,530 INFO L475 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2019-09-07 09:52:32,530 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 09:52:32,530 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2019-09-07 09:52:32,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-09-07 09:52:32,532 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:52:32,532 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:52:32,532 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:52:32,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:52:32,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1260975716, now seen corresponding path program 18 times [2019-09-07 09:52:32,533 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:52:32,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:52:32,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:32,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:52:32,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:52:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2019-09-07 09:52:32,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:52:32,791 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:52:32,810 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:54:24,194 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-09-07 09:54:24,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:54:24,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 09:54:24,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:54:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 912 trivial. 0 not checked. [2019-09-07 09:54:24,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:54:24,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-07 09:54:24,301 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 09:54:24,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 09:54:24,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:54:24,301 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand 23 states. [2019-09-07 09:54:24,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:54:24,600 INFO L93 Difference]: Finished difference Result 298 states and 309 transitions. [2019-09-07 09:54:24,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 09:54:24,601 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 152 [2019-09-07 09:54:24,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:54:24,603 INFO L225 Difference]: With dead ends: 298 [2019-09-07 09:54:24,603 INFO L226 Difference]: Without dead ends: 167 [2019-09-07 09:54:24,604 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:54:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-09-07 09:54:24,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2019-09-07 09:54:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-09-07 09:54:24,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2019-09-07 09:54:24,611 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 152 [2019-09-07 09:54:24,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:54:24,611 INFO L475 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2019-09-07 09:54:24,611 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 09:54:24,611 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2019-09-07 09:54:24,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-09-07 09:54:24,613 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:54:24,613 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:54:24,613 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:54:24,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:54:24,614 INFO L82 PathProgramCache]: Analyzing trace with hash 356016054, now seen corresponding path program 19 times [2019-09-07 09:54:24,614 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:54:24,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:54:24,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:24,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:54:24,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2019-09-07 09:54:24,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:54:24,923 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:54:24,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:54:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:25,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 09:54:25,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:54:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2019-09-07 09:54:25,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:54:25,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-09-07 09:54:25,113 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 09:54:25,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 09:54:25,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 09:54:25,114 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 24 states. [2019-09-07 09:54:25,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:54:25,432 INFO L93 Difference]: Finished difference Result 311 states and 322 transitions. [2019-09-07 09:54:25,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 09:54:25,433 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 159 [2019-09-07 09:54:25,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:54:25,434 INFO L225 Difference]: With dead ends: 311 [2019-09-07 09:54:25,434 INFO L226 Difference]: Without dead ends: 174 [2019-09-07 09:54:25,434 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 09:54:25,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-09-07 09:54:25,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2019-09-07 09:54:25,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-09-07 09:54:25,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 175 transitions. [2019-09-07 09:54:25,441 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 175 transitions. Word has length 159 [2019-09-07 09:54:25,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:54:25,441 INFO L475 AbstractCegarLoop]: Abstraction has 171 states and 175 transitions. [2019-09-07 09:54:25,441 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 09:54:25,441 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 175 transitions. [2019-09-07 09:54:25,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-09-07 09:54:25,443 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:54:25,443 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:54:25,444 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:54:25,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:54:25,444 INFO L82 PathProgramCache]: Analyzing trace with hash -83292968, now seen corresponding path program 20 times [2019-09-07 09:54:25,445 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:54:25,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:54:25,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:25,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:54:25,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2019-09-07 09:54:25,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:54:25,802 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:54:25,818 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:54:25,896 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:54:25,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:54:25,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 09:54:25,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:54:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2019-09-07 09:54:25,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:54:25,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-07 09:54:25,932 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 09:54:25,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 09:54:25,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:54:25,932 INFO L87 Difference]: Start difference. First operand 171 states and 175 transitions. Second operand 25 states. [2019-09-07 09:54:26,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:54:26,276 INFO L93 Difference]: Finished difference Result 324 states and 335 transitions. [2019-09-07 09:54:26,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-07 09:54:26,280 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 166 [2019-09-07 09:54:26,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:54:26,281 INFO L225 Difference]: With dead ends: 324 [2019-09-07 09:54:26,282 INFO L226 Difference]: Without dead ends: 181 [2019-09-07 09:54:26,282 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:54:26,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-09-07 09:54:26,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2019-09-07 09:54:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-09-07 09:54:26,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2019-09-07 09:54:26,290 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 166 [2019-09-07 09:54:26,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:54:26,290 INFO L475 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2019-09-07 09:54:26,290 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 09:54:26,290 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2019-09-07 09:54:26,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-09-07 09:54:26,292 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:54:26,292 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:54:26,293 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:54:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:54:26,293 INFO L82 PathProgramCache]: Analyzing trace with hash 28063018, now seen corresponding path program 21 times [2019-09-07 09:54:26,293 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:54:26,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:54:26,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:26,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:54:26,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1452 trivial. 0 not checked. [2019-09-07 09:54:26,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:54:26,722 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:54:26,738 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:55:07,838 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 09:55:07,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:55:07,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-07 09:55:07,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:55:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1452 trivial. 0 not checked. [2019-09-07 09:55:07,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:55:07,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-09-07 09:55:07,917 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 09:55:07,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 09:55:07,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 09:55:07,918 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 26 states. [2019-09-07 09:55:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:55:08,341 INFO L93 Difference]: Finished difference Result 337 states and 348 transitions. [2019-09-07 09:55:08,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 09:55:08,342 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 173 [2019-09-07 09:55:08,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:55:08,343 INFO L225 Difference]: With dead ends: 337 [2019-09-07 09:55:08,344 INFO L226 Difference]: Without dead ends: 188 [2019-09-07 09:55:08,345 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 09:55:08,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-09-07 09:55:08,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2019-09-07 09:55:08,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-09-07 09:55:08,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2019-09-07 09:55:08,355 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 173 [2019-09-07 09:55:08,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:55:08,356 INFO L475 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2019-09-07 09:55:08,356 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 09:55:08,356 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2019-09-07 09:55:08,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-09-07 09:55:08,360 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:55:08,360 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:55:08,361 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:55:08,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:55:08,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1907174068, now seen corresponding path program 22 times [2019-09-07 09:55:08,361 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:55:08,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:55:08,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:55:08,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:55:08,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:55:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:55:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2019-09-07 09:55:08,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:55:08,853 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) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:55:08,866 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:55:08,943 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:55:08,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:55:08,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 09:55:08,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:55:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (23)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:55:08,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:55:08,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-09-07 09:55:08,990 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 09:55:08,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 09:55:08,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 09:55:08,991 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand 27 states. [2019-09-07 09:55:09,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:55:09,319 INFO L93 Difference]: Finished difference Result 350 states and 361 transitions. [2019-09-07 09:55:09,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 09:55:09,321 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 180 [2019-09-07 09:55:09,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:55:09,322 INFO L225 Difference]: With dead ends: 350 [2019-09-07 09:55:09,322 INFO L226 Difference]: Without dead ends: 195 [2019-09-07 09:55:09,323 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 09:55:09,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-09-07 09:55:09,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2019-09-07 09:55:09,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-09-07 09:55:09,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2019-09-07 09:55:09,329 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 180 [2019-09-07 09:55:09,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:55:09,330 INFO L475 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2019-09-07 09:55:09,330 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 09:55:09,330 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2019-09-07 09:55:09,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-09-07 09:55:09,331 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:55:09,331 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:55:09,331 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:55:09,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:55:09,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1575895906, now seen corresponding path program 23 times [2019-09-07 09:55:09,332 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:55:09,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:55:09,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:55:09,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:55:09,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:55:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:55:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1728 trivial. 0 not checked. [2019-09-07 09:55:09,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:55:09,761 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) [2019-09-07 09:55:09,774 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:58:11,292 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-09-07 09:58:11,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:58:11,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 09:58:11,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:58:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1452 trivial. 0 not checked. [2019-09-07 09:58:11,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:58:11,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-09-07 09:58:11,462 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 09:58:11,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 09:58:11,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 09:58:11,463 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand 28 states. [2019-09-07 09:58:11,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:58:11,816 INFO L93 Difference]: Finished difference Result 363 states and 374 transitions. [2019-09-07 09:58:11,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-07 09:58:11,820 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 187 [2019-09-07 09:58:11,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:58:11,821 INFO L225 Difference]: With dead ends: 363 [2019-09-07 09:58:11,822 INFO L226 Difference]: Without dead ends: 202 [2019-09-07 09:58:11,823 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 09:58:11,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-09-07 09:58:11,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2019-09-07 09:58:11,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-09-07 09:58:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 203 transitions. [2019-09-07 09:58:11,829 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 203 transitions. Word has length 187 [2019-09-07 09:58:11,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:58:11,829 INFO L475 AbstractCegarLoop]: Abstraction has 199 states and 203 transitions. [2019-09-07 09:58:11,829 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 09:58:11,830 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 203 transitions. [2019-09-07 09:58:11,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-09-07 09:58:11,831 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:58:11,831 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:58:11,831 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:58:11,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:58:11,832 INFO L82 PathProgramCache]: Analyzing trace with hash -310685760, now seen corresponding path program 24 times [2019-09-07 09:58:11,832 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:58:11,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:58:11,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:58:11,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:58:11,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:58:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:58:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1875 trivial. 0 not checked. [2019-09-07 09:58:12,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:58:12,357 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:58:12,381 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 10:01:26,301 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2019-09-07 10:01:26,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:01:26,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-07 10:01:26,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:01:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1875 trivial. 0 not checked. [2019-09-07 10:01:26,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:01:26,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-09-07 10:01:26,476 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-07 10:01:26,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-07 10:01:26,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 10:01:26,479 INFO L87 Difference]: Start difference. First operand 199 states and 203 transitions. Second operand 29 states. [2019-09-07 10:01:26,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:01:26,880 INFO L93 Difference]: Finished difference Result 376 states and 387 transitions. [2019-09-07 10:01:26,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 10:01:26,881 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 194 [2019-09-07 10:01:26,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:01:26,882 INFO L225 Difference]: With dead ends: 376 [2019-09-07 10:01:26,882 INFO L226 Difference]: Without dead ends: 209 [2019-09-07 10:01:26,883 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 10:01:26,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-09-07 10:01:26,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 206. [2019-09-07 10:01:26,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-09-07 10:01:26,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2019-09-07 10:01:26,892 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 194 [2019-09-07 10:01:26,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:01:26,893 INFO L475 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2019-09-07 10:01:26,893 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-07 10:01:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2019-09-07 10:01:26,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-09-07 10:01:26,894 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:01:26,894 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:01:26,895 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:01:26,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:01:26,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1216481774, now seen corresponding path program 25 times [2019-09-07 10:01:26,895 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:01:26,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:01:26,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:01:26,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:01:26,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:01:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:01:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2019-09-07 10:01:27,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:01:27,387 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:01:27,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:01:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:01:27,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 10:01:27,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:01:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2019-09-07 10:01:27,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:01:27,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-09-07 10:01:27,590 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 10:01:27,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 10:01:27,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 10:01:27,592 INFO L87 Difference]: Start difference. First operand 206 states and 210 transitions. Second operand 30 states. [2019-09-07 10:01:27,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:01:27,992 INFO L93 Difference]: Finished difference Result 389 states and 400 transitions. [2019-09-07 10:01:27,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-07 10:01:27,992 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 201 [2019-09-07 10:01:27,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:01:27,993 INFO L225 Difference]: With dead ends: 389 [2019-09-07 10:01:27,993 INFO L226 Difference]: Without dead ends: 216 [2019-09-07 10:01:27,994 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 10:01:27,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-09-07 10:01:27,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2019-09-07 10:01:27,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-09-07 10:01:28,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2019-09-07 10:01:28,001 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 201 [2019-09-07 10:01:28,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:01:28,001 INFO L475 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2019-09-07 10:01:28,001 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 10:01:28,001 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2019-09-07 10:01:28,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-09-07 10:01:28,002 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:01:28,003 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:01:28,003 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:01:28,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:01:28,004 INFO L82 PathProgramCache]: Analyzing trace with hash -445154252, now seen corresponding path program 26 times [2019-09-07 10:01:28,004 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:01:28,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:01:28,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:01:28,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:01:28,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:01:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:01:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2187 trivial. 0 not checked. [2019-09-07 10:01:28,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:01:28,538 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:01:28,555 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:01:28,653 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:01:28,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:01:28,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 10:01:28,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:01:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2187 trivial. 0 not checked. [2019-09-07 10:01:28,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:01:28,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-09-07 10:01:28,708 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 10:01:28,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 10:01:28,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-09-07 10:01:28,708 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand 31 states. [2019-09-07 10:01:29,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:01:29,135 INFO L93 Difference]: Finished difference Result 402 states and 413 transitions. [2019-09-07 10:01:29,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-07 10:01:29,135 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 208 [2019-09-07 10:01:29,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:01:29,136 INFO L225 Difference]: With dead ends: 402 [2019-09-07 10:01:29,137 INFO L226 Difference]: Without dead ends: 223 [2019-09-07 10:01:29,138 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-09-07 10:01:29,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-09-07 10:01:29,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 220. [2019-09-07 10:01:29,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-09-07 10:01:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 224 transitions. [2019-09-07 10:01:29,145 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 224 transitions. Word has length 208 [2019-09-07 10:01:29,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:01:29,145 INFO L475 AbstractCegarLoop]: Abstraction has 220 states and 224 transitions. [2019-09-07 10:01:29,145 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 10:01:29,145 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 224 transitions. [2019-09-07 10:01:29,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-09-07 10:01:29,147 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:01:29,147 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:01:29,147 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:01:29,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:01:29,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1602609542, now seen corresponding path program 27 times [2019-09-07 10:01:29,148 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:01:29,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:01:29,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:01:29,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:01:29,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:01:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:01:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2019-09-07 10:01:29,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:01:29,722 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:01:29,733 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:02:43,501 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-09-07 10:02:43,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:02:43,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 10:02:43,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:02:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2019-09-07 10:02:43,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:02:43,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-09-07 10:02:43,622 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-07 10:02:43,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-07 10:02:43,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:02:43,623 INFO L87 Difference]: Start difference. First operand 220 states and 224 transitions. Second operand 32 states. [2019-09-07 10:02:44,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:02:44,055 INFO L93 Difference]: Finished difference Result 415 states and 426 transitions. [2019-09-07 10:02:44,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 10:02:44,056 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 215 [2019-09-07 10:02:44,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:02:44,057 INFO L225 Difference]: With dead ends: 415 [2019-09-07 10:02:44,057 INFO L226 Difference]: Without dead ends: 230 [2019-09-07 10:02:44,058 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:02:44,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-09-07 10:02:44,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2019-09-07 10:02:44,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-09-07 10:02:44,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 231 transitions. [2019-09-07 10:02:44,066 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 231 transitions. Word has length 215 [2019-09-07 10:02:44,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:02:44,066 INFO L475 AbstractCegarLoop]: Abstraction has 227 states and 231 transitions. [2019-09-07 10:02:44,066 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-07 10:02:44,066 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 231 transitions. [2019-09-07 10:02:44,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-09-07 10:02:44,068 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:02:44,068 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:02:44,068 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:02:44,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:02:44,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1740397224, now seen corresponding path program 28 times [2019-09-07 10:02:44,068 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:02:44,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:02:44,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:02:44,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:02:44,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:02:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:02:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2523 trivial. 0 not checked. [2019-09-07 10:02:44,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:02:44,709 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:02:44,726 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:02:44,849 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:02:44,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:02:44,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-07 10:02:44,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:02:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 2117 trivial. 0 not checked. [2019-09-07 10:02:44,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:02:44,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-09-07 10:02:44,918 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-07 10:02:44,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-07 10:02:44,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 10:02:44,919 INFO L87 Difference]: Start difference. First operand 227 states and 231 transitions. Second operand 33 states. [2019-09-07 10:02:45,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:02:45,338 INFO L93 Difference]: Finished difference Result 428 states and 439 transitions. [2019-09-07 10:02:45,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-07 10:02:45,340 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 222 [2019-09-07 10:02:45,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:02:45,341 INFO L225 Difference]: With dead ends: 428 [2019-09-07 10:02:45,342 INFO L226 Difference]: Without dead ends: 237 [2019-09-07 10:02:45,343 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 10:02:45,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-09-07 10:02:45,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2019-09-07 10:02:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2019-09-07 10:02:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 238 transitions. [2019-09-07 10:02:45,350 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 238 transitions. Word has length 222 [2019-09-07 10:02:45,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:02:45,351 INFO L475 AbstractCegarLoop]: Abstraction has 234 states and 238 transitions. [2019-09-07 10:02:45,351 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-07 10:02:45,351 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 238 transitions. [2019-09-07 10:02:45,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-09-07 10:02:45,352 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:02:45,353 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:02:45,353 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:02:45,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:02:45,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1413381882, now seen corresponding path program 29 times [2019-09-07 10:02:45,353 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:02:45,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:02:45,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:02:45,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:02:45,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:02:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:02:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3165 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2700 trivial. 0 not checked. [2019-09-07 10:02:45,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:02:45,916 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:02:45,927 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1