/usr/bin/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/reducercommutativity/max60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:10:37,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:10:37,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:10:37,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:10:37,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:10:37,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:10:37,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:10:37,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:10:37,622 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:10:37,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:10:37,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:10:37,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:10:37,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:10:37,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:10:37,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:10:37,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:10:37,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:10:37,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:10:37,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:10:37,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:10:37,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:10:37,650 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:10:37,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:10:37,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:10:37,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:10:37,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:10:37,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:10:37,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:10:37,668 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 [2019-11-06 22:10:37,702 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:10:37,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:10:37,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:10:37,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:10:37,704 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:10:37,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:10:37,704 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:10:37,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:10:37,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:10:37,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:10:37,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:10:37,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:10:37,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:10:37,705 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:10:37,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:10:37,709 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:10:37,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:10:37,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:10:37,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:10:37,709 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:10:37,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:10:37,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:10:37,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:10:37,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:10:37,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:10:37,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:10:37,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:10:37,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:10:37,711 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:10:38,008 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:10:38,021 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:10:38,025 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:10:38,027 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:10:38,027 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:10:38,028 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max60-2.i [2019-11-06 22:10:38,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a84105d1/9e91ef57b70a470a86a91d008ab61931/FLAG381031d6a [2019-11-06 22:10:38,561 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:10:38,562 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max60-2.i [2019-11-06 22:10:38,569 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a84105d1/9e91ef57b70a470a86a91d008ab61931/FLAG381031d6a [2019-11-06 22:10:38,915 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a84105d1/9e91ef57b70a470a86a91d008ab61931 [2019-11-06 22:10:38,923 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:10:38,924 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:10:38,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:10:38,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:10:38,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:10:38,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:10:38" (1/1) ... [2019-11-06 22:10:38,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c7e3271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:38, skipping insertion in model container [2019-11-06 22:10:38,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:10:38" (1/1) ... [2019-11-06 22:10:38,941 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:10:38,959 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:10:39,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:10:39,196 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:10:39,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:10:39,232 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:10:39,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:39 WrapperNode [2019-11-06 22:10:39,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:10:39,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:10:39,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:10:39,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:10:39,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:39" (1/1) ... [2019-11-06 22:10:39,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:39" (1/1) ... [2019-11-06 22:10:39,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:39" (1/1) ... [2019-11-06 22:10:39,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:39" (1/1) ... [2019-11-06 22:10:39,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:39" (1/1) ... [2019-11-06 22:10:39,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:39" (1/1) ... [2019-11-06 22:10:39,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:39" (1/1) ... [2019-11-06 22:10:39,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:10:39,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:10:39,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:10:39,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:10:39,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:10:39,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:10:39,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:10:39,426 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2019-11-06 22:10:39,426 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:10:39,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:10:39,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:10:39,427 INFO L130 BoogieDeclarations]: Found specification of procedure max [2019-11-06 22:10:39,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 22:10:39,427 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:10:39,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 22:10:39,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 22:10:39,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 22:10:39,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:10:39,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:10:39,750 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:10:39,751 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 22:10:39,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:10:39 BoogieIcfgContainer [2019-11-06 22:10:39,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:10:39,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:10:39,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:10:39,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:10:39,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:10:38" (1/3) ... [2019-11-06 22:10:39,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed851a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:10:39, skipping insertion in model container [2019-11-06 22:10:39,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:39" (2/3) ... [2019-11-06 22:10:39,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed851a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:10:39, skipping insertion in model container [2019-11-06 22:10:39,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:10:39" (3/3) ... [2019-11-06 22:10:39,760 INFO L109 eAbstractionObserver]: Analyzing ICFG max60-2.i [2019-11-06 22:10:39,773 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:10:39,788 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:10:39,799 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:10:39,823 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:10:39,824 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:10:39,824 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:10:39,824 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:10:39,824 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:10:39,824 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:10:39,824 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:10:39,824 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:10:39,843 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-11-06 22:10:39,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 22:10:39,850 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:39,851 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:39,853 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:39,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:39,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1379671032, now seen corresponding path program 1 times [2019-11-06 22:10:39,866 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:39,866 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547581382] [2019-11-06 22:10:39,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,096 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 22:10:40,097 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547581382] [2019-11-06 22:10:40,098 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:10:40,099 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:10:40,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711900824] [2019-11-06 22:10:40,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:10:40,105 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:40,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:10:40,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:10:40,122 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2019-11-06 22:10:40,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:40,274 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2019-11-06 22:10:40,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:10:40,276 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-11-06 22:10:40,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:40,286 INFO L225 Difference]: With dead ends: 60 [2019-11-06 22:10:40,286 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 22:10:40,290 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:10:40,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 22:10:40,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-06 22:10:40,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 22:10:40,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-11-06 22:10:40,332 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 32 [2019-11-06 22:10:40,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:40,333 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-11-06 22:10:40,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:10:40,334 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-11-06 22:10:40,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 22:10:40,336 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:40,336 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:40,337 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:40,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:40,337 INFO L82 PathProgramCache]: Analyzing trace with hash 551744077, now seen corresponding path program 1 times [2019-11-06 22:10:40,338 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:40,338 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811843883] [2019-11-06 22:10:40,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:10:40,471 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811843883] [2019-11-06 22:10:40,472 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965515102] [2019-11-06 22:10:40,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:10:40,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 22:10:40,583 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:10:40,583 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-11-06 22:10:40,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326525063] [2019-11-06 22:10:40,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:10:40,586 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:40,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:10:40,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:10:40,588 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 3 states. [2019-11-06 22:10:40,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:40,615 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2019-11-06 22:10:40,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:10:40,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-06 22:10:40,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:40,624 INFO L225 Difference]: With dead ends: 52 [2019-11-06 22:10:40,624 INFO L226 Difference]: Without dead ends: 33 [2019-11-06 22:10:40,627 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:10:40,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-06 22:10:40,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-11-06 22:10:40,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-06 22:10:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-11-06 22:10:40,648 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 34 [2019-11-06 22:10:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:40,649 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-11-06 22:10:40,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:10:40,649 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-11-06 22:10:40,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 22:10:40,654 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:40,654 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:40,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:40,857 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:40,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:40,858 INFO L82 PathProgramCache]: Analyzing trace with hash 727331048, now seen corresponding path program 1 times [2019-11-06 22:10:40,858 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:40,859 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592932933] [2019-11-06 22:10:40,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 22:10:41,006 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592932933] [2019-11-06 22:10:41,006 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:10:41,006 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:10:41,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439091126] [2019-11-06 22:10:41,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:10:41,007 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:41,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:10:41,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:10:41,008 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 4 states. [2019-11-06 22:10:41,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:41,102 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2019-11-06 22:10:41,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:10:41,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2019-11-06 22:10:41,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:41,104 INFO L225 Difference]: With dead ends: 47 [2019-11-06 22:10:41,104 INFO L226 Difference]: Without dead ends: 32 [2019-11-06 22:10:41,104 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:10:41,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-06 22:10:41,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-11-06 22:10:41,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 22:10:41,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-11-06 22:10:41,111 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 46 [2019-11-06 22:10:41,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:41,113 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-11-06 22:10:41,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:10:41,114 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-11-06 22:10:41,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-06 22:10:41,115 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:41,115 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:41,116 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:41,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:41,116 INFO L82 PathProgramCache]: Analyzing trace with hash -270429754, now seen corresponding path program 1 times [2019-11-06 22:10:41,116 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:41,117 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475083163] [2019-11-06 22:10:41,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 22:10:41,268 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475083163] [2019-11-06 22:10:41,268 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657332227] [2019-11-06 22:10:41,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:41,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:10:41,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 22:10:41,375 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:41,375 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 22:10:41,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631971900] [2019-11-06 22:10:41,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:10:41,377 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:41,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:10:41,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:10:41,377 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 6 states. [2019-11-06 22:10:41,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:41,486 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-11-06 22:10:41,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:10:41,488 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2019-11-06 22:10:41,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:41,489 INFO L225 Difference]: With dead ends: 56 [2019-11-06 22:10:41,489 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 22:10:41,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:10:41,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 22:10:41,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-06 22:10:41,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 22:10:41,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-11-06 22:10:41,501 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 48 [2019-11-06 22:10:41,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:41,502 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-11-06 22:10:41,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:10:41,502 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-11-06 22:10:41,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 22:10:41,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:41,504 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:41,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:41,708 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:41,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:41,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1585951496, now seen corresponding path program 2 times [2019-11-06 22:10:41,710 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:41,710 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567817089] [2019-11-06 22:10:41,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 22:10:41,859 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567817089] [2019-11-06 22:10:41,860 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170493686] [2019-11-06 22:10:41,860 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:41,926 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:10:41,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:41,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:10:41,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 22:10:41,956 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:41,956 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 22:10:41,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374115554] [2019-11-06 22:10:41,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:10:41,958 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:41,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:10:41,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:10:41,960 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 7 states. [2019-11-06 22:10:42,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:42,061 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2019-11-06 22:10:42,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:10:42,062 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-11-06 22:10:42,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:42,063 INFO L225 Difference]: With dead ends: 58 [2019-11-06 22:10:42,064 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 22:10:42,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:10:42,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 22:10:42,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-06 22:10:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 22:10:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-11-06 22:10:42,075 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 50 [2019-11-06 22:10:42,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:42,077 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-11-06 22:10:42,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:10:42,078 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-11-06 22:10:42,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 22:10:42,080 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:42,080 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:42,285 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:42,286 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:42,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:42,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1138062390, now seen corresponding path program 3 times [2019-11-06 22:10:42,288 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:42,288 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17583121] [2019-11-06 22:10:42,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 22:10:42,425 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17583121] [2019-11-06 22:10:42,426 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285778098] [2019-11-06 22:10:42,426 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:42,482 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 22:10:42,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:42,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:10:42,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-06 22:10:42,513 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:42,513 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 22:10:42,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889613928] [2019-11-06 22:10:42,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:10:42,527 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:42,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:10:42,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:10:42,531 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 9 states. [2019-11-06 22:10:42,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:42,685 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2019-11-06 22:10:42,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:10:42,686 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-11-06 22:10:42,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:42,687 INFO L225 Difference]: With dead ends: 67 [2019-11-06 22:10:42,687 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 22:10:42,688 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:10:42,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 22:10:42,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2019-11-06 22:10:42,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 22:10:42,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-11-06 22:10:42,695 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 52 [2019-11-06 22:10:42,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:42,695 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-11-06 22:10:42,695 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:10:42,695 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-11-06 22:10:42,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 22:10:42,696 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:42,697 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:42,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:42,898 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:42,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:42,898 INFO L82 PathProgramCache]: Analyzing trace with hash 454933031, now seen corresponding path program 4 times [2019-11-06 22:10:42,899 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:42,899 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368792313] [2019-11-06 22:10:42,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 22:10:43,006 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368792313] [2019-11-06 22:10:43,006 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855402368] [2019-11-06 22:10:43,006 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:43,073 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:10:43,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:43,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:10:43,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 22:10:43,106 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:43,106 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 22:10:43,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056204186] [2019-11-06 22:10:43,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:10:43,108 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:43,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:10:43,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:10:43,108 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 9 states. [2019-11-06 22:10:43,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:43,217 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2019-11-06 22:10:43,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:10:43,217 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2019-11-06 22:10:43,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:43,218 INFO L225 Difference]: With dead ends: 70 [2019-11-06 22:10:43,218 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 22:10:43,220 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:10:43,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 22:10:43,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-11-06 22:10:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 22:10:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2019-11-06 22:10:43,233 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 66 [2019-11-06 22:10:43,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:43,233 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2019-11-06 22:10:43,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:10:43,233 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2019-11-06 22:10:43,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-06 22:10:43,235 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:43,235 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:43,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:43,437 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:43,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:43,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1758121705, now seen corresponding path program 5 times [2019-11-06 22:10:43,438 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:43,438 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098078216] [2019-11-06 22:10:43,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 22:10:43,551 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098078216] [2019-11-06 22:10:43,552 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583001375] [2019-11-06 22:10:43,555 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:43,658 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-06 22:10:43,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:43,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:10:43,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-06 22:10:43,732 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:43,732 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 22:10:43,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822944579] [2019-11-06 22:10:43,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:10:43,733 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:43,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:10:43,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:10:43,734 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 12 states. [2019-11-06 22:10:43,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:43,917 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2019-11-06 22:10:43,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:10:43,917 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2019-11-06 22:10:43,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:43,918 INFO L225 Difference]: With dead ends: 79 [2019-11-06 22:10:43,918 INFO L226 Difference]: Without dead ends: 53 [2019-11-06 22:10:43,921 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:10:43,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-06 22:10:43,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2019-11-06 22:10:43,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 22:10:43,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2019-11-06 22:10:43,929 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 68 [2019-11-06 22:10:43,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:43,929 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2019-11-06 22:10:43,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:10:43,930 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2019-11-06 22:10:43,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-06 22:10:43,931 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:43,931 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:44,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:44,143 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:44,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:44,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1391411910, now seen corresponding path program 6 times [2019-11-06 22:10:44,144 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:44,144 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078663095] [2019-11-06 22:10:44,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 22:10:44,258 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078663095] [2019-11-06 22:10:44,258 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591685977] [2019-11-06 22:10:44,258 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:44,333 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-06 22:10:44,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:44,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:10:44,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 94 proven. 1 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-11-06 22:10:44,367 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:44,367 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 12 [2019-11-06 22:10:44,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580159945] [2019-11-06 22:10:44,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:10:44,368 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:44,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:10:44,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:10:44,369 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 12 states. [2019-11-06 22:10:44,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:44,488 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2019-11-06 22:10:44,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:10:44,488 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2019-11-06 22:10:44,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:44,489 INFO L225 Difference]: With dead ends: 85 [2019-11-06 22:10:44,489 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 22:10:44,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:10:44,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 22:10:44,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2019-11-06 22:10:44,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 22:10:44,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2019-11-06 22:10:44,496 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 82 [2019-11-06 22:10:44,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:44,497 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2019-11-06 22:10:44,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:10:44,497 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2019-11-06 22:10:44,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-06 22:10:44,498 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:44,498 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:44,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:44,702 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:44,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:44,702 INFO L82 PathProgramCache]: Analyzing trace with hash 197997542, now seen corresponding path program 7 times [2019-11-06 22:10:44,702 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:44,702 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160310371] [2019-11-06 22:10:44,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:44,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-06 22:10:44,850 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160310371] [2019-11-06 22:10:44,850 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022998186] [2019-11-06 22:10:44,850 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:44,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:10:44,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-06 22:10:44,960 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:44,960 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 22:10:44,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777172589] [2019-11-06 22:10:44,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:10:44,961 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:44,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:10:44,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:10:44,962 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 12 states. [2019-11-06 22:10:45,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:45,074 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2019-11-06 22:10:45,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:10:45,075 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2019-11-06 22:10:45,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:45,076 INFO L225 Difference]: With dead ends: 88 [2019-11-06 22:10:45,076 INFO L226 Difference]: Without dead ends: 56 [2019-11-06 22:10:45,077 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:10:45,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-06 22:10:45,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-11-06 22:10:45,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-06 22:10:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2019-11-06 22:10:45,084 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 86 [2019-11-06 22:10:45,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:45,085 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2019-11-06 22:10:45,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:10:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2019-11-06 22:10:45,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-06 22:10:45,086 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:45,086 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:45,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:45,287 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:45,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:45,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1074942888, now seen corresponding path program 8 times [2019-11-06 22:10:45,288 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:45,288 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98310954] [2019-11-06 22:10:45,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-06 22:10:45,418 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98310954] [2019-11-06 22:10:45,418 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004494059] [2019-11-06 22:10:45,418 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:45,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:10:45,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:45,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:10:45,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-06 22:10:45,545 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:45,545 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 22:10:45,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29169741] [2019-11-06 22:10:45,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:10:45,547 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:45,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:10:45,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:10:45,548 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 13 states. [2019-11-06 22:10:45,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:45,661 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2019-11-06 22:10:45,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:10:45,661 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 88 [2019-11-06 22:10:45,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:45,662 INFO L225 Difference]: With dead ends: 90 [2019-11-06 22:10:45,663 INFO L226 Difference]: Without dead ends: 58 [2019-11-06 22:10:45,664 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:10:45,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-06 22:10:45,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-11-06 22:10:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 22:10:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2019-11-06 22:10:45,672 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 88 [2019-11-06 22:10:45,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:45,673 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2019-11-06 22:10:45,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:10:45,673 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2019-11-06 22:10:45,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 22:10:45,674 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:45,674 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:45,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:45,877 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:45,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:45,878 INFO L82 PathProgramCache]: Analyzing trace with hash 2005830378, now seen corresponding path program 9 times [2019-11-06 22:10:45,878 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:45,878 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264386884] [2019-11-06 22:10:45,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-06 22:10:46,058 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264386884] [2019-11-06 22:10:46,059 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565609867] [2019-11-06 22:10:46,059 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:46,124 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 22:10:46,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:46,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:10:46,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 94 proven. 4 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2019-11-06 22:10:46,162 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:46,162 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-11-06 22:10:46,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572739425] [2019-11-06 22:10:46,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 22:10:46,163 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:46,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 22:10:46,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:10:46,164 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 16 states. [2019-11-06 22:10:46,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:46,357 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2019-11-06 22:10:46,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 22:10:46,358 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2019-11-06 22:10:46,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:46,358 INFO L225 Difference]: With dead ends: 95 [2019-11-06 22:10:46,359 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 22:10:46,359 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:10:46,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 22:10:46,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-11-06 22:10:46,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 22:10:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2019-11-06 22:10:46,365 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 90 [2019-11-06 22:10:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:46,366 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2019-11-06 22:10:46,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 22:10:46,366 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2019-11-06 22:10:46,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-06 22:10:46,367 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:46,367 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:46,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:46,578 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:46,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:46,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1656201482, now seen corresponding path program 10 times [2019-11-06 22:10:46,579 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:46,579 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763777020] [2019-11-06 22:10:46,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-11-06 22:10:46,728 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763777020] [2019-11-06 22:10:46,728 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033038804] [2019-11-06 22:10:46,728 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:46,815 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:10:46,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:46,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 22:10:46,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-11-06 22:10:46,862 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:46,862 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-06 22:10:46,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486277253] [2019-11-06 22:10:46,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 22:10:46,865 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:46,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 22:10:46,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:10:46,866 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 15 states. [2019-11-06 22:10:47,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:47,027 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2019-11-06 22:10:47,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 22:10:47,028 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 94 [2019-11-06 22:10:47,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:47,029 INFO L225 Difference]: With dead ends: 98 [2019-11-06 22:10:47,029 INFO L226 Difference]: Without dead ends: 64 [2019-11-06 22:10:47,030 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:10:47,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-06 22:10:47,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-11-06 22:10:47,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-06 22:10:47,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2019-11-06 22:10:47,038 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 94 [2019-11-06 22:10:47,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:47,040 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2019-11-06 22:10:47,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 22:10:47,041 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2019-11-06 22:10:47,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-06 22:10:47,042 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:47,042 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:47,242 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:47,243 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:47,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:47,243 INFO L82 PathProgramCache]: Analyzing trace with hash 659152588, now seen corresponding path program 11 times [2019-11-06 22:10:47,244 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:47,244 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551759487] [2019-11-06 22:10:47,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-11-06 22:10:47,535 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551759487] [2019-11-06 22:10:47,535 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995194900] [2019-11-06 22:10:47,535 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:47,806 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-11-06 22:10:47,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:47,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:10:47,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:47,866 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 88 proven. 15 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2019-11-06 22:10:47,866 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:47,866 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6] total 19 [2019-11-06 22:10:47,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114310795] [2019-11-06 22:10:47,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 22:10:47,867 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:47,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 22:10:47,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2019-11-06 22:10:47,868 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 19 states. [2019-11-06 22:10:48,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:48,071 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2019-11-06 22:10:48,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 22:10:48,071 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 96 [2019-11-06 22:10:48,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:48,072 INFO L225 Difference]: With dead ends: 107 [2019-11-06 22:10:48,072 INFO L226 Difference]: Without dead ends: 73 [2019-11-06 22:10:48,074 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2019-11-06 22:10:48,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-06 22:10:48,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2019-11-06 22:10:48,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-06 22:10:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2019-11-06 22:10:48,079 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 96 [2019-11-06 22:10:48,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:48,080 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2019-11-06 22:10:48,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 22:10:48,080 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2019-11-06 22:10:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 22:10:48,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:48,081 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:48,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:48,286 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:48,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:48,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1708395305, now seen corresponding path program 12 times [2019-11-06 22:10:48,287 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:48,287 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686763509] [2019-11-06 22:10:48,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-06 22:10:48,511 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686763509] [2019-11-06 22:10:48,512 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301411153] [2019-11-06 22:10:48,512 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:48,651 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-06 22:10:48,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:48,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:10:48,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 154 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2019-11-06 22:10:48,709 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:48,709 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-11-06 22:10:48,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421289205] [2019-11-06 22:10:48,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 22:10:48,710 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:48,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 22:10:48,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 22:10:48,711 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 20 states. [2019-11-06 22:10:48,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:48,903 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2019-11-06 22:10:48,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 22:10:48,903 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 110 [2019-11-06 22:10:48,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:48,904 INFO L225 Difference]: With dead ends: 113 [2019-11-06 22:10:48,905 INFO L226 Difference]: Without dead ends: 75 [2019-11-06 22:10:48,906 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 22:10:48,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-06 22:10:48,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2019-11-06 22:10:48,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-06 22:10:48,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2019-11-06 22:10:48,912 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 110 [2019-11-06 22:10:48,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:48,913 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2019-11-06 22:10:48,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 22:10:48,913 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2019-11-06 22:10:48,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-06 22:10:48,914 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:48,914 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:49,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:49,119 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:49,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:49,119 INFO L82 PathProgramCache]: Analyzing trace with hash -356697015, now seen corresponding path program 13 times [2019-11-06 22:10:49,120 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:49,120 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889589647] [2019-11-06 22:10:49,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:49,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-11-06 22:10:49,316 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889589647] [2019-11-06 22:10:49,316 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077177113] [2019-11-06 22:10:49,316 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:49,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 22:10:49,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-11-06 22:10:49,434 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:49,434 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 22:10:49,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027560170] [2019-11-06 22:10:49,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 22:10:49,435 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:49,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 22:10:49,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 22:10:49,436 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand 18 states. [2019-11-06 22:10:49,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:49,613 INFO L93 Difference]: Finished difference Result 116 states and 132 transitions. [2019-11-06 22:10:49,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 22:10:49,614 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 114 [2019-11-06 22:10:49,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:49,615 INFO L225 Difference]: With dead ends: 116 [2019-11-06 22:10:49,615 INFO L226 Difference]: Without dead ends: 76 [2019-11-06 22:10:49,616 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 22:10:49,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-06 22:10:49,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-11-06 22:10:49,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-06 22:10:49,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2019-11-06 22:10:49,621 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 114 [2019-11-06 22:10:49,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:49,621 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2019-11-06 22:10:49,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 22:10:49,622 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2019-11-06 22:10:49,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-06 22:10:49,622 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:49,623 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:49,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:49,823 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:49,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:49,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1330051829, now seen corresponding path program 14 times [2019-11-06 22:10:49,824 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:49,825 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421095092] [2019-11-06 22:10:49,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-11-06 22:10:50,035 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421095092] [2019-11-06 22:10:50,035 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968305188] [2019-11-06 22:10:50,035 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:50,131 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:10:50,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:50,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 22:10:50,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-11-06 22:10:50,165 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:50,165 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 22:10:50,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711444339] [2019-11-06 22:10:50,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 22:10:50,166 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:50,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 22:10:50,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 22:10:50,167 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand 19 states. [2019-11-06 22:10:50,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:50,304 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2019-11-06 22:10:50,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 22:10:50,304 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 116 [2019-11-06 22:10:50,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:50,305 INFO L225 Difference]: With dead ends: 118 [2019-11-06 22:10:50,305 INFO L226 Difference]: Without dead ends: 78 [2019-11-06 22:10:50,306 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 22:10:50,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-06 22:10:50,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-11-06 22:10:50,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 22:10:50,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2019-11-06 22:10:50,310 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 116 [2019-11-06 22:10:50,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:50,311 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2019-11-06 22:10:50,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 22:10:50,311 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2019-11-06 22:10:50,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-06 22:10:50,312 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:50,312 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:50,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:50,515 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:50,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:50,516 INFO L82 PathProgramCache]: Analyzing trace with hash -421157555, now seen corresponding path program 15 times [2019-11-06 22:10:50,516 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:50,516 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050470208] [2019-11-06 22:10:50,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-11-06 22:10:50,826 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050470208] [2019-11-06 22:10:50,826 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971028401] [2019-11-06 22:10:50,826 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:50,951 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-06 22:10:50,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:50,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:10:50,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 152 proven. 28 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-11-06 22:10:51,079 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:51,079 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-11-06 22:10:51,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147003023] [2019-11-06 22:10:51,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 22:10:51,081 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:51,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 22:10:51,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 22:10:51,082 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 24 states. [2019-11-06 22:10:51,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:51,416 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2019-11-06 22:10:51,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 22:10:51,416 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 118 [2019-11-06 22:10:51,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:51,417 INFO L225 Difference]: With dead ends: 127 [2019-11-06 22:10:51,417 INFO L226 Difference]: Without dead ends: 87 [2019-11-06 22:10:51,418 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2019-11-06 22:10:51,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-06 22:10:51,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2019-11-06 22:10:51,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-06 22:10:51,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2019-11-06 22:10:51,423 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 118 [2019-11-06 22:10:51,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:51,424 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2019-11-06 22:10:51,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 22:10:51,424 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2019-11-06 22:10:51,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 22:10:51,425 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:51,425 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:51,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:51,626 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:51,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:51,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1792802646, now seen corresponding path program 16 times [2019-11-06 22:10:51,627 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:51,627 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130546023] [2019-11-06 22:10:51,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:51,869 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-11-06 22:10:51,869 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130546023] [2019-11-06 22:10:51,869 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548855] [2019-11-06 22:10:51,869 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:51,984 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:10:51,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:51,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 22:10:51,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-11-06 22:10:52,012 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:52,012 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 22:10:52,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10288921] [2019-11-06 22:10:52,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 22:10:52,013 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:52,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 22:10:52,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 22:10:52,014 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand 21 states. [2019-11-06 22:10:52,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:52,220 INFO L93 Difference]: Finished difference Result 130 states and 148 transitions. [2019-11-06 22:10:52,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 22:10:52,220 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 132 [2019-11-06 22:10:52,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:52,221 INFO L225 Difference]: With dead ends: 130 [2019-11-06 22:10:52,221 INFO L226 Difference]: Without dead ends: 86 [2019-11-06 22:10:52,222 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 22:10:52,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-06 22:10:52,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-11-06 22:10:52,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-06 22:10:52,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2019-11-06 22:10:52,229 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 132 [2019-11-06 22:10:52,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:52,229 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2019-11-06 22:10:52,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 22:10:52,230 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2019-11-06 22:10:52,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 22:10:52,231 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:52,231 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:52,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:52,432 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:52,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:52,433 INFO L82 PathProgramCache]: Analyzing trace with hash -371467028, now seen corresponding path program 17 times [2019-11-06 22:10:52,433 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:52,433 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531838248] [2019-11-06 22:10:52,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-11-06 22:10:52,681 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531838248] [2019-11-06 22:10:52,681 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371763308] [2019-11-06 22:10:52,681 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:53,192 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-06 22:10:53,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:53,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:10:53,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 224 proven. 45 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2019-11-06 22:10:53,285 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:53,286 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 27 [2019-11-06 22:10:53,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137798127] [2019-11-06 22:10:53,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 22:10:53,287 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:53,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 22:10:53,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2019-11-06 22:10:53,288 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 27 states. [2019-11-06 22:10:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:53,709 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2019-11-06 22:10:53,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 22:10:53,709 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 134 [2019-11-06 22:10:53,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:53,711 INFO L225 Difference]: With dead ends: 139 [2019-11-06 22:10:53,711 INFO L226 Difference]: Without dead ends: 95 [2019-11-06 22:10:53,712 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 22:10:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-06 22:10:53,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2019-11-06 22:10:53,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-06 22:10:53,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2019-11-06 22:10:53,718 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 134 [2019-11-06 22:10:53,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:53,718 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2019-11-06 22:10:53,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 22:10:53,718 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2019-11-06 22:10:53,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-06 22:10:53,719 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:53,719 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:53,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:53,925 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:53,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:53,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1660813879, now seen corresponding path program 18 times [2019-11-06 22:10:53,927 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:53,927 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065523796] [2019-11-06 22:10:53,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2019-11-06 22:10:54,192 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065523796] [2019-11-06 22:10:54,192 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472529424] [2019-11-06 22:10:54,193 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:54,689 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-06 22:10:54,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:54,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:10:54,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 322 proven. 16 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2019-11-06 22:10:54,836 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:54,837 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 27 [2019-11-06 22:10:54,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143049790] [2019-11-06 22:10:54,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 22:10:54,838 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:54,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 22:10:54,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-11-06 22:10:54,839 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand 27 states. [2019-11-06 22:10:55,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:55,070 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2019-11-06 22:10:55,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 22:10:55,071 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 148 [2019-11-06 22:10:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:55,072 INFO L225 Difference]: With dead ends: 145 [2019-11-06 22:10:55,072 INFO L226 Difference]: Without dead ends: 97 [2019-11-06 22:10:55,073 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-11-06 22:10:55,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-06 22:10:55,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-11-06 22:10:55,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-06 22:10:55,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2019-11-06 22:10:55,077 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 148 [2019-11-06 22:10:55,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:55,078 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2019-11-06 22:10:55,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 22:10:55,078 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2019-11-06 22:10:55,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-06 22:10:55,079 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:55,080 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:55,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:55,281 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:55,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:55,281 INFO L82 PathProgramCache]: Analyzing trace with hash -462803735, now seen corresponding path program 19 times [2019-11-06 22:10:55,282 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:55,282 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729400533] [2019-11-06 22:10:55,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2019-11-06 22:10:55,572 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729400533] [2019-11-06 22:10:55,572 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696899189] [2019-11-06 22:10:55,572 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:55,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 22:10:55,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2019-11-06 22:10:55,720 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:55,720 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-11-06 22:10:55,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524435313] [2019-11-06 22:10:55,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 22:10:55,721 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:55,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 22:10:55,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 22:10:55,722 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 24 states. [2019-11-06 22:10:55,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:55,872 INFO L93 Difference]: Finished difference Result 148 states and 168 transitions. [2019-11-06 22:10:55,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 22:10:55,874 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 152 [2019-11-06 22:10:55,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:55,875 INFO L225 Difference]: With dead ends: 148 [2019-11-06 22:10:55,875 INFO L226 Difference]: Without dead ends: 98 [2019-11-06 22:10:55,875 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 22:10:55,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-06 22:10:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-11-06 22:10:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-06 22:10:55,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2019-11-06 22:10:55,880 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 152 [2019-11-06 22:10:55,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:55,880 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2019-11-06 22:10:55,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 22:10:55,880 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2019-11-06 22:10:55,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-06 22:10:55,881 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:55,881 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:56,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:56,083 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:56,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:56,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1779127339, now seen corresponding path program 20 times [2019-11-06 22:10:56,084 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:56,084 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714561115] [2019-11-06 22:10:56,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:56,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2019-11-06 22:10:56,510 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714561115] [2019-11-06 22:10:56,510 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683363356] [2019-11-06 22:10:56,510 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:56,615 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:10:56,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:56,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 22:10:56,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2019-11-06 22:10:56,658 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:56,658 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-11-06 22:10:56,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598264332] [2019-11-06 22:10:56,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 22:10:56,660 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:56,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 22:10:56,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 22:10:56,662 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand 25 states. [2019-11-06 22:10:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:56,901 INFO L93 Difference]: Finished difference Result 150 states and 170 transitions. [2019-11-06 22:10:56,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 22:10:56,901 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 154 [2019-11-06 22:10:56,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:56,902 INFO L225 Difference]: With dead ends: 150 [2019-11-06 22:10:56,902 INFO L226 Difference]: Without dead ends: 100 [2019-11-06 22:10:56,903 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 22:10:56,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-06 22:10:56,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-11-06 22:10:56,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-06 22:10:56,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2019-11-06 22:10:56,909 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 154 [2019-11-06 22:10:56,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:56,909 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2019-11-06 22:10:56,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 22:10:56,909 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2019-11-06 22:10:56,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-06 22:10:56,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:56,911 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:57,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:57,115 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:57,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:57,116 INFO L82 PathProgramCache]: Analyzing trace with hash 201306861, now seen corresponding path program 21 times [2019-11-06 22:10:57,116 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:57,116 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870620447] [2019-11-06 22:10:57,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1147 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2019-11-06 22:10:57,442 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870620447] [2019-11-06 22:10:57,446 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843951274] [2019-11-06 22:10:57,446 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:57,606 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-06 22:10:57,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:57,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:10:57,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1147 backedges. 322 proven. 25 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2019-11-06 22:10:57,714 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:57,714 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8] total 31 [2019-11-06 22:10:57,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297570679] [2019-11-06 22:10:57,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-06 22:10:57,715 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:57,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-06 22:10:57,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=625, Unknown=0, NotChecked=0, Total=930 [2019-11-06 22:10:57,716 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 31 states. [2019-11-06 22:10:57,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:57,994 INFO L93 Difference]: Finished difference Result 155 states and 176 transitions. [2019-11-06 22:10:57,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-06 22:10:57,995 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 156 [2019-11-06 22:10:57,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:57,996 INFO L225 Difference]: With dead ends: 155 [2019-11-06 22:10:57,997 INFO L226 Difference]: Without dead ends: 105 [2019-11-06 22:10:57,998 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=305, Invalid=625, Unknown=0, NotChecked=0, Total=930 [2019-11-06 22:10:57,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-06 22:10:58,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2019-11-06 22:10:58,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-06 22:10:58,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2019-11-06 22:10:58,003 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 156 [2019-11-06 22:10:58,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:58,004 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2019-11-06 22:10:58,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-06 22:10:58,004 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2019-11-06 22:10:58,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-06 22:10:58,005 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:58,005 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 18, 18, 18, 18, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:58,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:58,209 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:58,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:58,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1557379315, now seen corresponding path program 22 times [2019-11-06 22:10:58,210 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:58,210 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53607743] [2019-11-06 22:10:58,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2019-11-06 22:10:58,620 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53607743] [2019-11-06 22:10:58,621 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075536528] [2019-11-06 22:10:58,621 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:58,737 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:10:58,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:58,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 22:10:58,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2019-11-06 22:10:58,817 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:58,817 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-11-06 22:10:58,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918991686] [2019-11-06 22:10:58,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 22:10:58,818 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:58,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 22:10:58,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 22:10:58,819 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand 27 states. [2019-11-06 22:10:59,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:59,116 INFO L93 Difference]: Finished difference Result 158 states and 178 transitions. [2019-11-06 22:10:59,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 22:10:59,117 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 160 [2019-11-06 22:10:59,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:59,118 INFO L225 Difference]: With dead ends: 158 [2019-11-06 22:10:59,118 INFO L226 Difference]: Without dead ends: 106 [2019-11-06 22:10:59,119 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 22:10:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-06 22:10:59,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2019-11-06 22:10:59,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-06 22:10:59,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2019-11-06 22:10:59,125 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 160 [2019-11-06 22:10:59,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:59,125 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2019-11-06 22:10:59,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 22:10:59,125 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2019-11-06 22:10:59,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-06 22:10:59,127 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:59,127 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 18, 18, 18, 18, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:59,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:59,333 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:59,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:59,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1638200241, now seen corresponding path program 23 times [2019-11-06 22:10:59,333 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:59,333 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580015100] [2019-11-06 22:10:59,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2019-11-06 22:10:59,772 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580015100] [2019-11-06 22:10:59,772 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294834986] [2019-11-06 22:10:59,772 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:01,309 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-11-06 22:11:01,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:01,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:11:01,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2019-11-06 22:11:01,448 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:01,448 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9] total 34 [2019-11-06 22:11:01,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781771991] [2019-11-06 22:11:01,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-06 22:11:01,449 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:01,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-06 22:11:01,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=760, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 22:11:01,450 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand 34 states. [2019-11-06 22:11:01,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:01,946 INFO L93 Difference]: Finished difference Result 167 states and 193 transitions. [2019-11-06 22:11:01,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-06 22:11:01,947 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 162 [2019-11-06 22:11:01,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:01,948 INFO L225 Difference]: With dead ends: 167 [2019-11-06 22:11:01,948 INFO L226 Difference]: Without dead ends: 115 [2019-11-06 22:11:01,950 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=432, Invalid=1208, Unknown=0, NotChecked=0, Total=1640 [2019-11-06 22:11:01,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-06 22:11:01,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2019-11-06 22:11:01,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-06 22:11:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2019-11-06 22:11:01,955 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 162 [2019-11-06 22:11:01,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:01,955 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2019-11-06 22:11:01,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-06 22:11:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2019-11-06 22:11:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-11-06 22:11:01,957 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:01,957 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 21, 21, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:02,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:02,162 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:02,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:02,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1915017812, now seen corresponding path program 24 times [2019-11-06 22:11:02,163 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:02,164 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124863834] [2019-11-06 22:11:02,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2019-11-06 22:11:02,551 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124863834] [2019-11-06 22:11:02,551 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749832230] [2019-11-06 22:11:02,552 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:03,606 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-06 22:11:03,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:03,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:11:03,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 430 proven. 36 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2019-11-06 22:11:03,729 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:03,729 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9] total 35 [2019-11-06 22:11:03,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330663421] [2019-11-06 22:11:03,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-06 22:11:03,730 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:03,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-06 22:11:03,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 22:11:03,731 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand 35 states. [2019-11-06 22:11:04,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:04,140 INFO L93 Difference]: Finished difference Result 173 states and 196 transitions. [2019-11-06 22:11:04,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-06 22:11:04,140 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 176 [2019-11-06 22:11:04,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:04,142 INFO L225 Difference]: With dead ends: 173 [2019-11-06 22:11:04,142 INFO L226 Difference]: Without dead ends: 117 [2019-11-06 22:11:04,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 22:11:04,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-06 22:11:04,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2019-11-06 22:11:04,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-11-06 22:11:04,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2019-11-06 22:11:04,149 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 176 [2019-11-06 22:11:04,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:04,150 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2019-11-06 22:11:04,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-06 22:11:04,150 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2019-11-06 22:11:04,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-06 22:11:04,151 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:04,151 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 21, 21, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:04,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:04,356 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:04,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:04,357 INFO L82 PathProgramCache]: Analyzing trace with hash -664873780, now seen corresponding path program 25 times [2019-11-06 22:11:04,357 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:04,357 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026782197] [2019-11-06 22:11:04,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:04,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1592 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 967 trivial. 0 not checked. [2019-11-06 22:11:04,727 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026782197] [2019-11-06 22:11:04,727 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105989543] [2019-11-06 22:11:04,727 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:04,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-06 22:11:04,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1592 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 967 trivial. 0 not checked. [2019-11-06 22:11:04,909 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:04,909 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-11-06 22:11:04,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183718926] [2019-11-06 22:11:04,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-06 22:11:04,910 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:04,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-06 22:11:04,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 22:11:04,911 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand 30 states. [2019-11-06 22:11:05,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:05,181 INFO L93 Difference]: Finished difference Result 176 states and 198 transitions. [2019-11-06 22:11:05,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-06 22:11:05,182 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 180 [2019-11-06 22:11:05,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:05,183 INFO L225 Difference]: With dead ends: 176 [2019-11-06 22:11:05,183 INFO L226 Difference]: Without dead ends: 118 [2019-11-06 22:11:05,184 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 22:11:05,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-06 22:11:05,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2019-11-06 22:11:05,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-06 22:11:05,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 128 transitions. [2019-11-06 22:11:05,189 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 128 transitions. Word has length 180 [2019-11-06 22:11:05,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:05,190 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 128 transitions. [2019-11-06 22:11:05,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-06 22:11:05,190 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 128 transitions. [2019-11-06 22:11:05,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-11-06 22:11:05,191 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:05,191 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 21, 21, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:05,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:05,395 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:05,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:05,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1692951822, now seen corresponding path program 26 times [2019-11-06 22:11:05,396 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:05,396 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889271503] [2019-11-06 22:11:05,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1643 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 967 trivial. 0 not checked. [2019-11-06 22:11:05,782 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889271503] [2019-11-06 22:11:05,783 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124059205] [2019-11-06 22:11:05,783 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:05,915 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:11:05,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:05,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-06 22:11:05,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1643 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 967 trivial. 0 not checked. [2019-11-06 22:11:05,958 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:05,958 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-11-06 22:11:05,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521390783] [2019-11-06 22:11:05,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-06 22:11:05,959 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:05,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-06 22:11:05,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 22:11:05,961 INFO L87 Difference]: Start difference. First operand 117 states and 128 transitions. Second operand 31 states. [2019-11-06 22:11:06,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:06,240 INFO L93 Difference]: Finished difference Result 178 states and 200 transitions. [2019-11-06 22:11:06,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 22:11:06,240 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 182 [2019-11-06 22:11:06,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:06,241 INFO L225 Difference]: With dead ends: 178 [2019-11-06 22:11:06,241 INFO L226 Difference]: Without dead ends: 120 [2019-11-06 22:11:06,243 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 22:11:06,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-11-06 22:11:06,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2019-11-06 22:11:06,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-11-06 22:11:06,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2019-11-06 22:11:06,248 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 182 [2019-11-06 22:11:06,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:06,248 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2019-11-06 22:11:06,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-06 22:11:06,248 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2019-11-06 22:11:06,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-11-06 22:11:06,249 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:06,250 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 21, 21, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:06,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:06,453 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:06,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:06,454 INFO L82 PathProgramCache]: Analyzing trace with hash -179376944, now seen corresponding path program 27 times [2019-11-06 22:11:06,454 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:06,454 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197375965] [2019-11-06 22:11:06,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1696 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 967 trivial. 0 not checked. [2019-11-06 22:11:06,886 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197375965] [2019-11-06 22:11:06,887 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651963070] [2019-11-06 22:11:06,887 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:07,077 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-06 22:11:07,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:07,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:11:07,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1696 backedges. 428 proven. 91 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2019-11-06 22:11:07,260 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:07,260 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 10] total 39 [2019-11-06 22:11:07,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061270366] [2019-11-06 22:11:07,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-06 22:11:07,261 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:07,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-06 22:11:07,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1001, Unknown=0, NotChecked=0, Total=1482 [2019-11-06 22:11:07,262 INFO L87 Difference]: Start difference. First operand 119 states and 130 transitions. Second operand 39 states. [2019-11-06 22:11:07,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:07,836 INFO L93 Difference]: Finished difference Result 187 states and 215 transitions. [2019-11-06 22:11:07,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-06 22:11:07,836 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 184 [2019-11-06 22:11:07,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:07,837 INFO L225 Difference]: With dead ends: 187 [2019-11-06 22:11:07,837 INFO L226 Difference]: Without dead ends: 129 [2019-11-06 22:11:07,839 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=569, Invalid=1593, Unknown=0, NotChecked=0, Total=2162 [2019-11-06 22:11:07,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-06 22:11:07,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2019-11-06 22:11:07,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-06 22:11:07,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2019-11-06 22:11:07,845 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 184 [2019-11-06 22:11:07,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:07,845 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2019-11-06 22:11:07,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-06 22:11:07,845 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2019-11-06 22:11:07,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-11-06 22:11:07,846 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:07,847 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 24, 24, 24, 24, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:08,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:08,049 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:08,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:08,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1322478291, now seen corresponding path program 28 times [2019-11-06 22:11:08,050 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:08,050 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722162168] [2019-11-06 22:11:08,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2019-11-06 22:11:08,489 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722162168] [2019-11-06 22:11:08,489 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869337177] [2019-11-06 22:11:08,489 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:08,638 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:11:08,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:08,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-06 22:11:08,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2019-11-06 22:11:08,681 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:08,681 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-11-06 22:11:08,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890173876] [2019-11-06 22:11:08,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-06 22:11:08,682 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:08,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-06 22:11:08,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 22:11:08,683 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand 33 states. [2019-11-06 22:11:08,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:08,979 INFO L93 Difference]: Finished difference Result 190 states and 214 transitions. [2019-11-06 22:11:08,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 22:11:08,980 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 198 [2019-11-06 22:11:08,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:08,981 INFO L225 Difference]: With dead ends: 190 [2019-11-06 22:11:08,981 INFO L226 Difference]: Without dead ends: 128 [2019-11-06 22:11:08,983 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 22:11:08,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-06 22:11:08,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2019-11-06 22:11:08,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-11-06 22:11:08,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 139 transitions. [2019-11-06 22:11:08,987 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 139 transitions. Word has length 198 [2019-11-06 22:11:08,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:08,987 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 139 transitions. [2019-11-06 22:11:08,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-06 22:11:08,988 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 139 transitions. [2019-11-06 22:11:08,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-11-06 22:11:08,989 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:08,989 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 24, 24, 24, 24, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:09,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:09,193 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:09,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:09,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1784633583, now seen corresponding path program 29 times [2019-11-06 22:11:09,194 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:09,194 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56114705] [2019-11-06 22:11:09,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2019-11-06 22:11:09,749 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56114705] [2019-11-06 22:11:09,749 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571657846] [2019-11-06 22:11:09,749 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:20,201 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2019-11-06 22:11:20,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:20,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:11:20,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 548 proven. 120 refuted. 0 times theorem prover too weak. 1413 trivial. 0 not checked. [2019-11-06 22:11:20,407 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:20,407 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 11] total 42 [2019-11-06 22:11:20,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645465556] [2019-11-06 22:11:20,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-06 22:11:20,408 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:20,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-06 22:11:20,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=1170, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 22:11:20,409 INFO L87 Difference]: Start difference. First operand 127 states and 139 transitions. Second operand 42 states. [2019-11-06 22:11:20,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:20,984 INFO L93 Difference]: Finished difference Result 199 states and 229 transitions. [2019-11-06 22:11:20,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-06 22:11:20,985 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 200 [2019-11-06 22:11:20,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:20,986 INFO L225 Difference]: With dead ends: 199 [2019-11-06 22:11:20,987 INFO L226 Difference]: Without dead ends: 137 [2019-11-06 22:11:20,989 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=660, Invalid=1890, Unknown=0, NotChecked=0, Total=2550 [2019-11-06 22:11:20,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-06 22:11:20,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2019-11-06 22:11:20,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-11-06 22:11:20,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 146 transitions. [2019-11-06 22:11:20,994 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 146 transitions. Word has length 200 [2019-11-06 22:11:20,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:20,994 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 146 transitions. [2019-11-06 22:11:20,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-06 22:11:20,994 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 146 transitions. [2019-11-06 22:11:20,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-06 22:11:20,995 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:20,998 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 27, 27, 27, 27, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:21,207 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:21,207 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:21,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:21,208 INFO L82 PathProgramCache]: Analyzing trace with hash 537609932, now seen corresponding path program 30 times [2019-11-06 22:11:21,208 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:21,208 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364876214] [2019-11-06 22:11:21,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat