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/loops-crafted-1/Mono5_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 12:14:48,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 12:14:48,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 12:14:48,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-05 12:14:48,789 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-05 12:14:48,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-05 12:14:48,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-05 12:14:48,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-05 12:14:48,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-05 12:14:48,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-05 12:14:48,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-05 12:14:48,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-05 12:14:48,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-05 12:14:48,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-05 12:14:48,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-05 12:14:48,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-05 12:14:48,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-05 12:14:48,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-05 12:14:48,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-05 12:14:48,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-05 12:14:48,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-05 12:14:48,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-05 12:14:48,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-05 12:14:48,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-05 12:14:48,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-05 12:14:48,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 12:14:48,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 12:14:48,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 12:14:48,825 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-05 12:14:48,839 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 12:14:48,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 12:14:48,841 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-05 12:14:48,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-05 12:14:48,841 INFO L138 SettingsManager]: * Use SBE=true [2019-09-05 12:14:48,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 12:14:48,842 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 12:14:48,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-05 12:14:48,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 12:14:48,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 12:14:48,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 12:14:48,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 12:14:48,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 12:14:48,843 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 12:14:48,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 12:14:48,843 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-05 12:14:48,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 12:14:48,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 12:14:48,844 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 12:14:48,844 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-05 12:14:48,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-05 12:14:48,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:14:48,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 12:14:48,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 12:14:48,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-05 12:14:48,847 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-05 12:14:48,847 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 12:14:48,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 12:14:48,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-05 12:14:48,877 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 12:14:48,889 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 12:14:48,892 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 12:14:48,894 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 12:14:48,894 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 12:14:48,895 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono5_1.c [2019-09-05 12:14:48,960 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f01edf8ca/9fc27c758f204e918782f86dc3adcc20/FLAG66508a970 [2019-09-05 12:14:49,406 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 12:14:49,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono5_1.c [2019-09-05 12:14:49,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f01edf8ca/9fc27c758f204e918782f86dc3adcc20/FLAG66508a970 [2019-09-05 12:14:49,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f01edf8ca/9fc27c758f204e918782f86dc3adcc20 [2019-09-05 12:14:49,796 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 12:14:49,798 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 12:14:49,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 12:14:49,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 12:14:49,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 12:14:49,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:14:49" (1/1) ... [2019-09-05 12:14:49,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e067075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:14:49, skipping insertion in model container [2019-09-05 12:14:49,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:14:49" (1/1) ... [2019-09-05 12:14:49,815 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 12:14:49,831 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 12:14:49,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:14:49,982 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 12:14:49,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:14:50,013 INFO L192 MainTranslator]: Completed translation [2019-09-05 12:14:50,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:14:50 WrapperNode [2019-09-05 12:14:50,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 12:14:50,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 12:14:50,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 12:14:50,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 12:14:50,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:14:50" (1/1) ... [2019-09-05 12:14:50,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:14:50" (1/1) ... [2019-09-05 12:14:50,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:14:50" (1/1) ... [2019-09-05 12:14:50,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:14:50" (1/1) ... [2019-09-05 12:14:50,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:14:50" (1/1) ... [2019-09-05 12:14:50,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:14:50" (1/1) ... [2019-09-05 12:14:50,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:14:50" (1/1) ... [2019-09-05 12:14:50,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 12:14:50,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 12:14:50,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 12:14:50,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 12:14:50,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:14:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:14:50,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 12:14:50,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 12:14:50,186 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 12:14:50,186 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 12:14:50,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 12:14:50,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 12:14:50,187 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 12:14:50,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 12:14:50,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 12:14:50,354 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 12:14:50,355 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-05 12:14:50,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:14:50 BoogieIcfgContainer [2019-09-05 12:14:50,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 12:14:50,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 12:14:50,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 12:14:50,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 12:14:50,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 12:14:49" (1/3) ... [2019-09-05 12:14:50,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7dbd0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:14:50, skipping insertion in model container [2019-09-05 12:14:50,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:14:50" (2/3) ... [2019-09-05 12:14:50,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7dbd0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:14:50, skipping insertion in model container [2019-09-05 12:14:50,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:14:50" (3/3) ... [2019-09-05 12:14:50,363 INFO L109 eAbstractionObserver]: Analyzing ICFG Mono5_1.c [2019-09-05 12:14:50,373 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 12:14:50,380 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 12:14:50,395 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 12:14:50,422 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-05 12:14:50,423 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 12:14:50,423 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-05 12:14:50,423 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 12:14:50,423 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 12:14:50,423 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 12:14:50,424 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 12:14:50,424 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 12:14:50,424 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 12:14:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-05 12:14:50,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 12:14:50,444 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:50,445 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:50,447 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:50,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:50,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1713253442, now seen corresponding path program 1 times [2019-09-05 12:14:50,452 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:50,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:50,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:50,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:14:50,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:14:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:50,539 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:14:50,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-05 12:14:50,543 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 12:14:50,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 12:14:50,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:14:50,559 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-09-05 12:14:50,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:50,579 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-09-05 12:14:50,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 12:14:50,580 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-05 12:14:50,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:50,586 INFO L225 Difference]: With dead ends: 30 [2019-09-05 12:14:50,586 INFO L226 Difference]: Without dead ends: 13 [2019-09-05 12:14:50,590 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:14:50,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-05 12:14:50,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-05 12:14:50,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-05 12:14:50,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-09-05 12:14:50,621 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-09-05 12:14:50,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:50,622 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-09-05 12:14:50,622 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 12:14:50,622 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-09-05 12:14:50,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 12:14:50,623 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:50,623 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:50,624 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:50,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:50,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1703094711, now seen corresponding path program 1 times [2019-09-05 12:14:50,624 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:50,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:50,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:50,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:14:50,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:14:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:50,794 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:14:50,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-05 12:14:50,797 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 12:14:50,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 12:14:50,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-05 12:14:50,798 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2019-09-05 12:14:50,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:50,857 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-09-05 12:14:50,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 12:14:50,859 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-05 12:14:50,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:50,860 INFO L225 Difference]: With dead ends: 21 [2019-09-05 12:14:50,860 INFO L226 Difference]: Without dead ends: 16 [2019-09-05 12:14:50,861 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:14:50,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-05 12:14:50,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-05 12:14:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-05 12:14:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-05 12:14:50,867 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-09-05 12:14:50,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:50,867 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-05 12:14:50,867 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 12:14:50,867 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-05 12:14:50,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-05 12:14:50,868 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:50,868 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:50,868 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:50,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:50,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1264308876, now seen corresponding path program 1 times [2019-09-05 12:14:50,869 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:50,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:50,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:50,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:14:50,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:14:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:50,978 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:14:50,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-05 12:14:50,979 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-05 12:14:50,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-05 12:14:50,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-05 12:14:50,980 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 3 states. [2019-09-05 12:14:51,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:51,005 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-09-05 12:14:51,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-05 12:14:51,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-09-05 12:14:51,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:51,007 INFO L225 Difference]: With dead ends: 27 [2019-09-05 12:14:51,007 INFO L226 Difference]: Without dead ends: 19 [2019-09-05 12:14:51,008 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-05 12:14:51,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-05 12:14:51,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-09-05 12:14:51,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-05 12:14:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-09-05 12:14:51,013 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-09-05 12:14:51,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:51,013 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-09-05 12:14:51,014 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-05 12:14:51,014 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-09-05 12:14:51,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-05 12:14:51,015 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:51,015 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:51,015 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:51,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:51,016 INFO L82 PathProgramCache]: Analyzing trace with hash -265742635, now seen corresponding path program 1 times [2019-09-05 12:14:51,016 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:51,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:51,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:51,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:14:51,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:14:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:51,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:14:51,115 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:14:51,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:14:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:14:51,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-05 12:14:51,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:51,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:51,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:14:51,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-05 12:14:51,202 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 12:14:51,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 12:14:51,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-05 12:14:51,203 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2019-09-05 12:14:51,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:51,264 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-09-05 12:14:51,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-05 12:14:51,265 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-09-05 12:14:51,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:51,266 INFO L225 Difference]: With dead ends: 30 [2019-09-05 12:14:51,267 INFO L226 Difference]: Without dead ends: 22 [2019-09-05 12:14:51,267 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-05 12:14:51,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-05 12:14:51,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-09-05 12:14:51,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-05 12:14:51,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-09-05 12:14:51,274 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2019-09-05 12:14:51,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:51,275 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-09-05 12:14:51,275 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 12:14:51,275 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-09-05 12:14:51,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-05 12:14:51,276 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:51,276 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:51,276 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:51,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:51,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1077650900, now seen corresponding path program 2 times [2019-09-05 12:14:51,277 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:51,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:51,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:51,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:14:51,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:14:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:51,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:14:51,410 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 12:14:51,436 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:14:51,456 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:14:51,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:51,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-05 12:14:51,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:51,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:51,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:14:51,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-05 12:14:51,499 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-05 12:14:51,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-05 12:14:51,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:14:51,500 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2019-09-05 12:14:51,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:51,569 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-09-05 12:14:51,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 12:14:51,571 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-09-05 12:14:51,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:51,573 INFO L225 Difference]: With dead ends: 33 [2019-09-05 12:14:51,573 INFO L226 Difference]: Without dead ends: 25 [2019-09-05 12:14:51,574 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:14:51,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-05 12:14:51,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-09-05 12:14:51,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-05 12:14:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-09-05 12:14:51,584 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2019-09-05 12:14:51,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:51,585 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-09-05 12:14:51,585 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-05 12:14:51,585 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-09-05 12:14:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-05 12:14:51,587 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:51,588 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:51,588 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:51,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:51,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1609187957, now seen corresponding path program 3 times [2019-09-05 12:14:51,589 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:51,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:51,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:51,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:14:51,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:14:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:51,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:14:51,753 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:14:51,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:14:51,801 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-05 12:14:51,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:51,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-05 12:14:51,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-05 12:14:51,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:14:51,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-09-05 12:14:51,870 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 12:14:51,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 12:14:51,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:14:51,871 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2019-09-05 12:14:52,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:52,057 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2019-09-05 12:14:52,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-05 12:14:52,060 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-09-05 12:14:52,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:52,061 INFO L225 Difference]: With dead ends: 42 [2019-09-05 12:14:52,062 INFO L226 Difference]: Without dead ends: 31 [2019-09-05 12:14:52,062 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:14:52,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-05 12:14:52,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-09-05 12:14:52,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-05 12:14:52,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-09-05 12:14:52,068 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2019-09-05 12:14:52,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:52,069 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-09-05 12:14:52,069 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 12:14:52,069 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-09-05 12:14:52,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-05 12:14:52,070 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:52,070 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:52,070 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:52,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:52,071 INFO L82 PathProgramCache]: Analyzing trace with hash 238113751, now seen corresponding path program 4 times [2019-09-05 12:14:52,071 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:52,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:52,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:52,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:14:52,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:14:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-05 12:14:52,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:14:52,219 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) [2019-09-05 12:14:52,233 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 [2019-09-05 12:14:52,250 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:14:52,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:52,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-05 12:14:52,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-05 12:14:52,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:14:52,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-05 12:14:52,289 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-05 12:14:52,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-05 12:14:52,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:14:52,290 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2019-09-05 12:14:52,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:52,384 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2019-09-05 12:14:52,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 12:14:52,384 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2019-09-05 12:14:52,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:52,385 INFO L225 Difference]: With dead ends: 45 [2019-09-05 12:14:52,386 INFO L226 Difference]: Without dead ends: 34 [2019-09-05 12:14:52,386 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:14:52,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-05 12:14:52,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-09-05 12:14:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-05 12:14:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2019-09-05 12:14:52,392 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 28 [2019-09-05 12:14:52,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:52,392 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2019-09-05 12:14:52,392 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-05 12:14:52,393 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2019-09-05 12:14:52,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-05 12:14:52,393 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:52,394 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:52,394 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:52,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:52,394 INFO L82 PathProgramCache]: Analyzing trace with hash 358767702, now seen corresponding path program 5 times [2019-09-05 12:14:52,394 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:52,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:52,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:52,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:14:52,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:14:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-05 12:14:52,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:14:52,543 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:14:52,558 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:14:54,964 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-09-05 12:14:54,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:55,000 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-05 12:14:55,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:55,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:14:55,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2019-09-05 12:14:55,068 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 12:14:55,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 12:14:55,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:14:55,069 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 10 states. [2019-09-05 12:14:55,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:55,217 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2019-09-05 12:14:55,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 12:14:55,218 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2019-09-05 12:14:55,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:55,219 INFO L225 Difference]: With dead ends: 51 [2019-09-05 12:14:55,219 INFO L226 Difference]: Without dead ends: 40 [2019-09-05 12:14:55,220 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:14:55,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-05 12:14:55,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-09-05 12:14:55,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-05 12:14:55,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2019-09-05 12:14:55,227 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 31 [2019-09-05 12:14:55,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:55,228 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2019-09-05 12:14:55,228 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 12:14:55,228 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2019-09-05 12:14:55,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-05 12:14:55,229 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:55,229 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:55,230 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:55,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:55,230 INFO L82 PathProgramCache]: Analyzing trace with hash -2031059786, now seen corresponding path program 6 times [2019-09-05 12:14:55,230 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:55,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:55,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:55,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:14:55,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:14:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 38 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-05 12:14:55,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:14:55,390 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:14:55,408 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:14:55,448 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-05 12:14:55,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:55,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-05 12:14:55,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-05 12:14:55,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:14:55,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-09-05 12:14:55,541 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-05 12:14:55,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-05 12:14:55,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:14:55,543 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 15 states. [2019-09-05 12:14:55,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:55,948 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2019-09-05 12:14:55,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-05 12:14:55,948 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2019-09-05 12:14:55,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:55,951 INFO L225 Difference]: With dead ends: 60 [2019-09-05 12:14:55,951 INFO L226 Difference]: Without dead ends: 46 [2019-09-05 12:14:55,952 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2019-09-05 12:14:55,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-05 12:14:55,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2019-09-05 12:14:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-05 12:14:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-09-05 12:14:55,966 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 37 [2019-09-05 12:14:55,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:55,966 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-09-05 12:14:55,966 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-05 12:14:55,967 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-09-05 12:14:55,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-05 12:14:55,968 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:55,968 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:55,971 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:55,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:55,972 INFO L82 PathProgramCache]: Analyzing trace with hash -692664300, now seen corresponding path program 7 times [2019-09-05 12:14:55,972 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:55,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:55,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:55,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:14:55,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:14:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 69 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-05 12:14:56,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:14:56,179 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:14:56,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:14:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:14:56,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-05 12:14:56,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:56,248 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 69 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-05 12:14:56,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:14:56,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-05 12:14:56,255 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-05 12:14:56,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-05 12:14:56,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-09-05 12:14:56,256 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 12 states. [2019-09-05 12:14:56,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:56,456 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2019-09-05 12:14:56,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-05 12:14:56,457 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2019-09-05 12:14:56,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:56,458 INFO L225 Difference]: With dead ends: 63 [2019-09-05 12:14:56,458 INFO L226 Difference]: Without dead ends: 49 [2019-09-05 12:14:56,459 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-09-05 12:14:56,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-05 12:14:56,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-09-05 12:14:56,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-05 12:14:56,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2019-09-05 12:14:56,465 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 43 [2019-09-05 12:14:56,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:56,466 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2019-09-05 12:14:56,466 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-05 12:14:56,466 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2019-09-05 12:14:56,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-05 12:14:56,467 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:56,468 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:56,468 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:56,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:56,468 INFO L82 PathProgramCache]: Analyzing trace with hash -575549003, now seen corresponding path program 8 times [2019-09-05 12:14:56,468 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:56,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:56,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:56,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:14:56,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:14:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 77 proven. 126 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-05 12:14:56,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:14:56,668 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:14:56,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:14:56,706 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:14:56,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:56,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-05 12:14:56,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 77 proven. 126 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-05 12:14:56,750 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:14:56,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-05 12:14:56,750 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 12:14:56,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 12:14:56,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:14:56,752 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 13 states. [2019-09-05 12:14:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:56,956 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-09-05 12:14:56,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-05 12:14:56,958 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2019-09-05 12:14:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:56,960 INFO L225 Difference]: With dead ends: 66 [2019-09-05 12:14:56,960 INFO L226 Difference]: Without dead ends: 52 [2019-09-05 12:14:56,961 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:14:56,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-05 12:14:56,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-09-05 12:14:56,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-05 12:14:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-09-05 12:14:56,973 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 46 [2019-09-05 12:14:56,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:56,973 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-09-05 12:14:56,974 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 12:14:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-09-05 12:14:56,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-05 12:14:56,977 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:56,977 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:56,978 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:56,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:56,979 INFO L82 PathProgramCache]: Analyzing trace with hash 892819572, now seen corresponding path program 9 times [2019-09-05 12:14:56,979 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:56,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:56,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:56,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:14:56,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:14:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 85 proven. 155 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-05 12:14:57,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:14:57,189 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:14:57,209 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:14:57,228 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-05 12:14:57,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:57,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-05 12:14:57,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-09-05 12:14:57,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:14:57,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2019-09-05 12:14:57,350 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-05 12:14:57,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-05 12:14:57,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:14:57,351 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 19 states. [2019-09-05 12:14:57,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:57,998 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2019-09-05 12:14:57,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-05 12:14:57,998 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2019-09-05 12:14:57,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:57,999 INFO L225 Difference]: With dead ends: 75 [2019-09-05 12:14:57,999 INFO L226 Difference]: Without dead ends: 58 [2019-09-05 12:14:58,000 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2019-09-05 12:14:58,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-05 12:14:58,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-09-05 12:14:58,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-05 12:14:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2019-09-05 12:14:58,006 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 49 [2019-09-05 12:14:58,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:58,007 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2019-09-05 12:14:58,007 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-05 12:14:58,007 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2019-09-05 12:14:58,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-05 12:14:58,008 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:58,013 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:58,014 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:58,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:58,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1212048662, now seen corresponding path program 10 times [2019-09-05 12:14:58,014 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:58,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:58,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:58,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:14:58,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:14:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 128 proven. 187 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-05 12:14:58,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:14:58,242 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:14:58,258 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:14:58,279 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:14:58,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:58,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-05 12:14:58,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 128 proven. 187 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:14:58,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:14:58,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-05 12:14:58,332 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-05 12:14:58,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-05 12:14:58,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:14:58,334 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 15 states. [2019-09-05 12:14:58,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:58,661 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2019-09-05 12:14:58,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-05 12:14:58,661 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2019-09-05 12:14:58,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:58,663 INFO L225 Difference]: With dead ends: 78 [2019-09-05 12:14:58,663 INFO L226 Difference]: Without dead ends: 61 [2019-09-05 12:14:58,664 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:14:58,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-05 12:14:58,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-09-05 12:14:58,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-05 12:14:58,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2019-09-05 12:14:58,669 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 55 [2019-09-05 12:14:58,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:58,670 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2019-09-05 12:14:58,670 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-05 12:14:58,670 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2019-09-05 12:14:58,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-05 12:14:58,671 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:58,672 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:58,672 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:58,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:58,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1247479095, now seen corresponding path program 11 times [2019-09-05 12:14:58,673 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:58,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:58,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:58,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:14:58,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:14:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 139 proven. 222 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-05 12:14:58,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:14:58,899 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:14:58,912 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:17:59,835 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-09-05 12:17:59,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:18:00,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-05 12:18:00,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:18:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-09-05 12:18:00,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:18:00,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2019-09-05 12:18:00,363 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-05 12:18:00,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-05 12:18:00,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2019-09-05 12:18:00,364 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 22 states. [2019-09-05 12:18:01,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:01,227 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2019-09-05 12:18:01,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-05 12:18:01,227 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2019-09-05 12:18:01,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:01,228 INFO L225 Difference]: With dead ends: 87 [2019-09-05 12:18:01,228 INFO L226 Difference]: Without dead ends: 67 [2019-09-05 12:18:01,229 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2019-09-05 12:18:01,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-05 12:18:01,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-09-05 12:18:01,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-05 12:18:01,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2019-09-05 12:18:01,236 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 58 [2019-09-05 12:18:01,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:01,237 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2019-09-05 12:18:01,237 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-05 12:18:01,237 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2019-09-05 12:18:01,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-05 12:18:01,238 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:01,238 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 13, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:01,238 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:01,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:01,239 INFO L82 PathProgramCache]: Analyzing trace with hash 604431701, now seen corresponding path program 12 times [2019-09-05 12:18:01,239 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:01,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:01,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:01,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:18:01,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 191 proven. 260 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-05 12:18:01,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:18:01,502 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) [2019-09-05 12:18:01,519 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 [2019-09-05 12:18:05,533 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-09-05 12:18:05,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:18:05,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-05 12:18:05,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:18:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-09-05 12:18:05,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:18:05,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 24 [2019-09-05 12:18:05,693 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-05 12:18:05,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-05 12:18:05,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2019-09-05 12:18:05,696 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 24 states. [2019-09-05 12:18:06,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:06,730 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2019-09-05 12:18:06,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-05 12:18:06,731 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 64 [2019-09-05 12:18:06,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:06,733 INFO L225 Difference]: With dead ends: 96 [2019-09-05 12:18:06,733 INFO L226 Difference]: Without dead ends: 73 [2019-09-05 12:18:06,734 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=1338, Unknown=0, NotChecked=0, Total=1482 [2019-09-05 12:18:06,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-05 12:18:06,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-09-05 12:18:06,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-05 12:18:06,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2019-09-05 12:18:06,740 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 64 [2019-09-05 12:18:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:06,741 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2019-09-05 12:18:06,741 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-05 12:18:06,741 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2019-09-05 12:18:06,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-05 12:18:06,742 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:06,742 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 14, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:06,742 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:06,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:06,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1939528631, now seen corresponding path program 13 times [2019-09-05 12:18:06,743 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:06,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:06,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:06,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:18:06,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 249 proven. 301 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-05 12:18:07,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:18:07,039 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) [2019-09-05 12:18:07,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:18:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:07,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-05 12:18:07,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:18:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 249 proven. 301 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-05 12:18:07,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:18:07,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-09-05 12:18:07,121 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-05 12:18:07,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-05 12:18:07,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-09-05 12:18:07,122 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 18 states. [2019-09-05 12:18:07,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:07,621 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2019-09-05 12:18:07,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-05 12:18:07,621 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2019-09-05 12:18:07,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:07,623 INFO L225 Difference]: With dead ends: 99 [2019-09-05 12:18:07,623 INFO L226 Difference]: Without dead ends: 76 [2019-09-05 12:18:07,624 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-09-05 12:18:07,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-05 12:18:07,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-09-05 12:18:07,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-05 12:18:07,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2019-09-05 12:18:07,632 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 70 [2019-09-05 12:18:07,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:07,632 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2019-09-05 12:18:07,632 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-05 12:18:07,633 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2019-09-05 12:18:07,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-05 12:18:07,643 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:07,643 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:07,643 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:07,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:07,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1267214986, now seen corresponding path program 14 times [2019-09-05 12:18:07,644 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:07,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:07,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:07,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:18:07,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 266 proven. 345 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-05 12:18:07,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:18:07,906 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:18:07,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:18:07,960 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:18:07,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:18:07,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-05 12:18:07,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:18:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 266 proven. 345 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-05 12:18:08,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:18:08,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-05 12:18:08,012 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-05 12:18:08,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-05 12:18:08,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:18:08,013 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 19 states. [2019-09-05 12:18:08,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:08,524 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2019-09-05 12:18:08,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-05 12:18:08,525 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2019-09-05 12:18:08,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:08,526 INFO L225 Difference]: With dead ends: 102 [2019-09-05 12:18:08,526 INFO L226 Difference]: Without dead ends: 79 [2019-09-05 12:18:08,527 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:18:08,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-05 12:18:08,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2019-09-05 12:18:08,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-05 12:18:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2019-09-05 12:18:08,533 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 73 [2019-09-05 12:18:08,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:08,533 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2019-09-05 12:18:08,533 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-05 12:18:08,533 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2019-09-05 12:18:08,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-05 12:18:08,534 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:08,534 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 16, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:08,534 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:08,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:08,535 INFO L82 PathProgramCache]: Analyzing trace with hash -408744105, now seen corresponding path program 15 times [2019-09-05 12:18:08,535 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:08,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:08,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:08,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:18:08,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 283 proven. 392 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-05 12:18:08,821 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:18:08,821 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:18:08,831 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:18:08,929 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-05 12:18:08,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:18:08,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-05 12:18:08,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:18:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 323 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-09-05 12:18:09,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:18:09,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2019-09-05 12:18:09,148 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-05 12:18:09,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-05 12:18:09,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2019-09-05 12:18:09,150 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 28 states. [2019-09-05 12:18:10,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:10,555 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2019-09-05 12:18:10,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-05 12:18:10,555 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 76 [2019-09-05 12:18:10,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:10,556 INFO L225 Difference]: With dead ends: 111 [2019-09-05 12:18:10,556 INFO L226 Difference]: Without dead ends: 85 [2019-09-05 12:18:10,558 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=1897, Unknown=0, NotChecked=0, Total=2070 [2019-09-05 12:18:10,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-05 12:18:10,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2019-09-05 12:18:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-05 12:18:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2019-09-05 12:18:10,564 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 76 [2019-09-05 12:18:10,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:10,565 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2019-09-05 12:18:10,565 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-05 12:18:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2019-09-05 12:18:10,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-05 12:18:10,566 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:10,566 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 17, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:10,566 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:10,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:10,567 INFO L82 PathProgramCache]: Analyzing trace with hash 452817141, now seen corresponding path program 16 times [2019-09-05 12:18:10,567 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:10,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:10,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:10,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:18:10,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 353 proven. 442 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-09-05 12:18:10,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:18:10,883 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:18:10,893 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:18:10,925 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:18:10,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:18:10,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-05 12:18:10,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:18:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 353 proven. 442 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-09-05 12:18:10,992 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:18:10,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-09-05 12:18:10,993 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-05 12:18:10,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-05 12:18:10,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:18:10,994 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand 21 states. [2019-09-05 12:18:11,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:11,663 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2019-09-05 12:18:11,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-05 12:18:11,664 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 82 [2019-09-05 12:18:11,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:11,665 INFO L225 Difference]: With dead ends: 114 [2019-09-05 12:18:11,665 INFO L226 Difference]: Without dead ends: 88 [2019-09-05 12:18:11,666 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:18:11,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-05 12:18:11,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2019-09-05 12:18:11,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-05 12:18:11,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2019-09-05 12:18:11,671 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 82 [2019-09-05 12:18:11,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:11,671 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2019-09-05 12:18:11,671 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-05 12:18:11,671 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2019-09-05 12:18:11,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-05 12:18:11,672 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:11,672 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 18, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:11,673 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:11,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1458488372, now seen corresponding path program 17 times [2019-09-05 12:18:11,673 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:11,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:11,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:11,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:18:11,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 373 proven. 495 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-09-05 12:18:12,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:18:12,008 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:18:12,019 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:23:06,142 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2019-09-05 12:23:06,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:23:07,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 41 conjunts are in the unsatisfiable core [2019-09-05 12:23:07,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:23:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 334 proven. 551 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-05 12:23:08,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:23:08,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 23 [2019-09-05 12:23:08,038 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-05 12:23:08,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-05 12:23:08,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:23:08,039 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand 23 states. [2019-09-05 12:23:08,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:23:08,809 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2019-09-05 12:23:08,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-05 12:23:08,809 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2019-09-05 12:23:08,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:23:08,811 INFO L225 Difference]: With dead ends: 120 [2019-09-05 12:23:08,811 INFO L226 Difference]: Without dead ends: 94 [2019-09-05 12:23:08,812 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:23:08,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-05 12:23:08,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-09-05 12:23:08,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-05 12:23:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2019-09-05 12:23:08,817 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 85 [2019-09-05 12:23:08,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:23:08,817 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2019-09-05 12:23:08,817 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-05 12:23:08,817 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2019-09-05 12:23:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-05 12:23:08,818 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:23:08,818 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 20, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:23:08,819 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:23:08,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:23:08,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1548016788, now seen corresponding path program 18 times [2019-09-05 12:23:08,819 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:23:08,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:23:08,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:23:08,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:23:08,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:23:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:23:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 413 proven. 610 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-09-05 12:23:09,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:23:09,183 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:23:09,195 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:25:13,531 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-09-05 12:25:13,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:25:14,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-05 12:25:14,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:25:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 470 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-09-05 12:25:14,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:25:14,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2019-09-05 12:25:14,299 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-05 12:25:14,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-05 12:25:14,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=973, Unknown=0, NotChecked=0, Total=1056 [2019-09-05 12:25:14,308 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand 33 states. [2019-09-05 12:25:16,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:25:16,384 INFO L93 Difference]: Finished difference Result 129 states and 147 transitions. [2019-09-05 12:25:16,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-05 12:25:16,384 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 91 [2019-09-05 12:25:16,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:25:16,386 INFO L225 Difference]: With dead ends: 129 [2019-09-05 12:25:16,386 INFO L226 Difference]: Without dead ends: 100 [2019-09-05 12:25:16,388 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=211, Invalid=2759, Unknown=0, NotChecked=0, Total=2970 [2019-09-05 12:25:16,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-05 12:25:16,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-09-05 12:25:16,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-09-05 12:25:16,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2019-09-05 12:25:16,393 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 91 [2019-09-05 12:25:16,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:25:16,393 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2019-09-05 12:25:16,393 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-05 12:25:16,393 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2019-09-05 12:25:16,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-05 12:25:16,394 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:25:16,394 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 21, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:25:16,395 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:25:16,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:25:16,395 INFO L82 PathProgramCache]: Analyzing trace with hash 324869686, now seen corresponding path program 19 times [2019-09-05 12:25:16,395 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:25:16,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:25:16,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:25:16,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:25:16,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:25:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:25:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 498 proven. 672 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-05 12:25:16,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:25:16,812 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:25:16,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:25:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:25:16,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 45 conjunts are in the unsatisfiable core [2019-09-05 12:25:16,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:25:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 498 proven. 672 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-05 12:25:16,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:25:16,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-05 12:25:16,904 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-05 12:25:16,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-05 12:25:16,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2019-09-05 12:25:16,905 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand 25 states. [2019-09-05 12:25:17,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:25:17,898 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2019-09-05 12:25:17,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-05 12:25:17,902 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2019-09-05 12:25:17,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:25:17,904 INFO L225 Difference]: With dead ends: 132 [2019-09-05 12:25:17,904 INFO L226 Difference]: Without dead ends: 103 [2019-09-05 12:25:17,904 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2019-09-05 12:25:17,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-05 12:25:17,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2019-09-05 12:25:17,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-05 12:25:17,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2019-09-05 12:25:17,909 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 97 [2019-09-05 12:25:17,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:25:17,910 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2019-09-05 12:25:17,910 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-05 12:25:17,910 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2019-09-05 12:25:17,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-05 12:25:17,911 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:25:17,911 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 22, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:25:17,911 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:25:17,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:25:17,911 INFO L82 PathProgramCache]: Analyzing trace with hash 622920983, now seen corresponding path program 20 times [2019-09-05 12:25:17,911 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:25:17,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:25:17,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:25:17,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:25:17,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:25:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:25:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 521 proven. 737 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-05 12:25:18,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:25:18,543 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:25:18,563 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:25:18,599 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:25:18,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:25:18,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-05 12:25:18,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:25:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 521 proven. 737 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-05 12:25:18,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:25:18,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-09-05 12:25:18,693 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-05 12:25:18,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-05 12:25:18,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2019-09-05 12:25:18,694 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 26 states. [2019-09-05 12:25:19,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:25:19,745 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2019-09-05 12:25:19,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-05 12:25:19,746 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 100 [2019-09-05 12:25:19,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:25:19,747 INFO L225 Difference]: With dead ends: 135 [2019-09-05 12:25:19,747 INFO L226 Difference]: Without dead ends: 106 [2019-09-05 12:25:19,748 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2019-09-05 12:25:19,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-09-05 12:25:19,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2019-09-05 12:25:19,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-09-05 12:25:19,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 114 transitions. [2019-09-05 12:25:19,753 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 114 transitions. Word has length 100 [2019-09-05 12:25:19,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:25:19,754 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 114 transitions. [2019-09-05 12:25:19,754 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-05 12:25:19,754 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 114 transitions. [2019-09-05 12:25:19,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-05 12:25:19,754 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:25:19,755 INFO L399 BasicCegarLoop]: trace histogram [31, 31, 23, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:25:19,755 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:25:19,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:25:19,755 INFO L82 PathProgramCache]: Analyzing trace with hash -2123258218, now seen corresponding path program 21 times [2019-09-05 12:25:19,755 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:25:19,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:25:19,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:25:19,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:25:19,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:25:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:25:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 544 proven. 805 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-05 12:25:20,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:25:20,219 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:25:20,231 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:26:44,332 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2019-09-05 12:26:44,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:26:46,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-05 12:26:46,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:26:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 621 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-09-05 12:26:46,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:26:46,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13] total 37 [2019-09-05 12:26:46,426 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-05 12:26:46,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-05 12:26:46,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2019-09-05 12:26:46,427 INFO L87 Difference]: Start difference. First operand 105 states and 114 transitions. Second operand 37 states. [2019-09-05 12:26:49,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:26:49,077 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2019-09-05 12:26:49,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-05 12:26:49,077 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 103 [2019-09-05 12:26:49,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:26:49,078 INFO L225 Difference]: With dead ends: 144 [2019-09-05 12:26:49,078 INFO L226 Difference]: Without dead ends: 112 [2019-09-05 12:26:49,079 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=240, Invalid=3542, Unknown=0, NotChecked=0, Total=3782 [2019-09-05 12:26:49,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-09-05 12:26:49,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2019-09-05 12:26:49,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-09-05 12:26:49,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2019-09-05 12:26:49,084 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 103 [2019-09-05 12:26:49,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:26:49,084 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2019-09-05 12:26:49,084 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-05 12:26:49,085 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2019-09-05 12:26:49,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-05 12:26:49,085 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:26:49,086 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 24, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:26:49,086 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:26:49,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:26:49,086 INFO L82 PathProgramCache]: Analyzing trace with hash 210032244, now seen corresponding path program 22 times [2019-09-05 12:26:49,086 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:26:49,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:26:49,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:26:49,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:26:49,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:26:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:26:49,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 641 proven. 876 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-09-05 12:26:49,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:26:49,656 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 12:26:49,686 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:26:49,718 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:26:49,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:26:49,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-05 12:26:49,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:26:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 641 proven. 876 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-09-05 12:26:49,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:26:49,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-09-05 12:26:49,808 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-05 12:26:49,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-05 12:26:49,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2019-09-05 12:26:49,808 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 28 states. [2019-09-05 12:26:51,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:26:51,105 INFO L93 Difference]: Finished difference Result 147 states and 167 transitions. [2019-09-05 12:26:51,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-05 12:26:51,106 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2019-09-05 12:26:51,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:26:51,107 INFO L225 Difference]: With dead ends: 147 [2019-09-05 12:26:51,107 INFO L226 Difference]: Without dead ends: 115 [2019-09-05 12:26:51,108 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2019-09-05 12:26:51,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-09-05 12:26:51,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-09-05 12:26:51,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-09-05 12:26:51,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2019-09-05 12:26:51,112 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 109 [2019-09-05 12:26:51,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:26:51,113 INFO L475 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2019-09-05 12:26:51,113 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-05 12:26:51,113 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2019-09-05 12:26:51,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-05 12:26:51,114 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:26:51,114 INFO L399 BasicCegarLoop]: trace histogram [34, 34, 25, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:26:51,114 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:26:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:26:51,114 INFO L82 PathProgramCache]: Analyzing trace with hash -355961899, now seen corresponding path program 23 times [2019-09-05 12:26:51,114 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:26:51,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:26:51,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:26:51,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:26:51,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:26:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:26:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 667 proven. 950 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-09-05 12:26:51,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:26:51,894 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:26:51,923 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1