/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/avg40-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:09:53,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:09:53,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:09:53,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:09:53,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:09:53,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:09:53,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:09:53,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:09:53,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:09:53,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:09:53,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:09:53,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:09:53,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:09:53,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:09:53,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:09:53,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:09:53,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:09:53,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:09:53,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:09:53,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:09:53,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:09:53,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:09:53,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:09:53,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:09:53,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:09:53,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:09:53,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:09:53,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:09:53,229 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 22:09:53,243 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:09:53,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:09:53,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:09:53,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:09:53,245 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:09:53,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:09:53,245 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:09:53,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:09:53,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:09:53,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:09:53,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:09:53,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:09:53,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:09:53,246 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:09:53,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:09:53,247 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:09:53,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:09:53,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:09:53,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:09:53,247 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:09:53,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:09:53,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:09:53,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:09:53,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:09:53,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:09:53,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:09:53,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:09:53,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:09:53,249 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:09:53,511 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:09:53,530 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:09:53,535 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:09:53,537 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:09:53,537 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:09:53,538 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg40-2.i [2019-11-06 22:09:53,615 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96b7aab19/14bf85a7472e4a99beb2052b532b9568/FLAGdd5e5c3ac [2019-11-06 22:09:54,096 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:09:54,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg40-2.i [2019-11-06 22:09:54,105 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96b7aab19/14bf85a7472e4a99beb2052b532b9568/FLAGdd5e5c3ac [2019-11-06 22:09:54,498 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96b7aab19/14bf85a7472e4a99beb2052b532b9568 [2019-11-06 22:09:54,508 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:09:54,510 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:09:54,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:09:54,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:09:54,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:09:54,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:09:54" (1/1) ... [2019-11-06 22:09:54,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128aa138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:54, skipping insertion in model container [2019-11-06 22:09:54,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:09:54" (1/1) ... [2019-11-06 22:09:54,525 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:09:54,546 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:09:54,751 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:09:54,760 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:09:54,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:09:54,795 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:09:54,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:54 WrapperNode [2019-11-06 22:09:54,795 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:09:54,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:09:54,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:09:54,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:09:54,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:54" (1/1) ... [2019-11-06 22:09:54,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:54" (1/1) ... [2019-11-06 22:09:54,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:54" (1/1) ... [2019-11-06 22:09:54,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:54" (1/1) ... [2019-11-06 22:09:54,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:54" (1/1) ... [2019-11-06 22:09:54,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:54" (1/1) ... [2019-11-06 22:09:54,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:54" (1/1) ... [2019-11-06 22:09:54,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:09:54,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:09:54,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:09:54,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:09:54,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:54" (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 22:09:55,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:09:55,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:09:55,009 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2019-11-06 22:09:55,009 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:09:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:09:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:09:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2019-11-06 22:09:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 22:09:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:09:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 22:09:55,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 22:09:55,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 22:09:55,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:09:55,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:09:55,329 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:09:55,329 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 22:09:55,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:09:55 BoogieIcfgContainer [2019-11-06 22:09:55,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:09:55,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:09:55,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:09:55,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:09:55,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:09:54" (1/3) ... [2019-11-06 22:09:55,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c27bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:09:55, skipping insertion in model container [2019-11-06 22:09:55,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:54" (2/3) ... [2019-11-06 22:09:55,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c27bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:09:55, skipping insertion in model container [2019-11-06 22:09:55,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:09:55" (3/3) ... [2019-11-06 22:09:55,340 INFO L109 eAbstractionObserver]: Analyzing ICFG avg40-2.i [2019-11-06 22:09:55,348 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:09:55,356 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:09:55,367 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:09:55,389 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:09:55,389 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:09:55,389 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:09:55,390 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:09:55,390 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:09:55,390 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:09:55,390 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:09:55,390 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:09:55,406 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-06 22:09:55,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 22:09:55,412 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:55,413 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 22:09:55,415 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:55,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:55,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1283808693, now seen corresponding path program 1 times [2019-11-06 22:09:55,426 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:55,426 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186227056] [2019-11-06 22:09:55,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:55,660 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 22:09:55,661 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186227056] [2019-11-06 22:09:55,662 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:09:55,662 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:09:55,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716103459] [2019-11-06 22:09:55,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:09:55,669 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:55,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:09:55,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:09:55,691 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-11-06 22:09:55,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:55,845 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-11-06 22:09:55,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:09:55,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 22:09:55,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:55,865 INFO L225 Difference]: With dead ends: 54 [2019-11-06 22:09:55,866 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 22:09:55,872 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:09:55,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 22:09:55,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 22:09:55,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 22:09:55,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-06 22:09:55,934 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-11-06 22:09:55,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:55,935 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-06 22:09:55,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:09:55,935 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-06 22:09:55,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 22:09:55,940 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:55,940 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 22:09:55,941 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:55,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:55,941 INFO L82 PathProgramCache]: Analyzing trace with hash 721846027, now seen corresponding path program 1 times [2019-11-06 22:09:55,941 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:55,942 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132788572] [2019-11-06 22:09:55,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 22:09:56,135 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132788572] [2019-11-06 22:09:56,135 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413756493] [2019-11-06 22:09:56,137 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 22:09:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:56,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:09:56,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:56,242 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 22:09:56,242 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:09:56,242 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 22:09:56,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834004596] [2019-11-06 22:09:56,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:09:56,245 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:56,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:09:56,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:09:56,246 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-11-06 22:09:56,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:56,262 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-06 22:09:56,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:09:56,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 22:09:56,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:56,264 INFO L225 Difference]: With dead ends: 46 [2019-11-06 22:09:56,264 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 22:09:56,266 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:09:56,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 22:09:56,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-06 22:09:56,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 22:09:56,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-06 22:09:56,273 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-11-06 22:09:56,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:56,274 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-06 22:09:56,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:09:56,274 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-06 22:09:56,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 22:09:56,275 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:56,276 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 22:09:56,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:56,481 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:56,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:56,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1487444845, now seen corresponding path program 1 times [2019-11-06 22:09:56,482 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:56,483 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72424045] [2019-11-06 22:09:56,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:56,614 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 22:09:56,614 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72424045] [2019-11-06 22:09:56,622 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674346291] [2019-11-06 22:09:56,622 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 22:09:56,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:56,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:09:56,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:56,712 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 22:09:56,713 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:09:56,713 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-11-06 22:09:56,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051368424] [2019-11-06 22:09:56,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:09:56,714 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:56,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:09:56,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:09:56,716 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-06 22:09:56,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:56,739 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-11-06 22:09:56,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:09:56,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-06 22:09:56,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:56,741 INFO L225 Difference]: With dead ends: 46 [2019-11-06 22:09:56,741 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 22:09:56,742 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 22:09:56,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 22:09:56,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-06 22:09:56,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 22:09:56,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-06 22:09:56,754 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-11-06 22:09:56,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:56,754 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-06 22:09:56,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:09:56,754 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-06 22:09:56,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 22:09:56,757 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:56,757 INFO L410 BasicCegarLoop]: trace histogram [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 22:09:56,961 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:56,962 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:56,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:56,962 INFO L82 PathProgramCache]: Analyzing trace with hash 2063023467, now seen corresponding path program 1 times [2019-11-06 22:09:56,962 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:56,963 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989338003] [2019-11-06 22:09:56,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 22:09:57,139 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989338003] [2019-11-06 22:09:57,139 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421471106] [2019-11-06 22:09:57,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:09:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:57,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:09:57,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 22:09:57,248 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:09:57,248 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 22:09:57,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000213617] [2019-11-06 22:09:57,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:09:57,249 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:57,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:09:57,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:09:57,250 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-11-06 22:09:57,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:57,265 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-11-06 22:09:57,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:09:57,267 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-11-06 22:09:57,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:57,268 INFO L225 Difference]: With dead ends: 43 [2019-11-06 22:09:57,268 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 22:09:57,270 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:09:57,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 22:09:57,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-06 22:09:57,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 22:09:57,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-06 22:09:57,281 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-11-06 22:09:57,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:57,286 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-06 22:09:57,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:09:57,286 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-06 22:09:57,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 22:09:57,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:57,290 INFO L410 BasicCegarLoop]: trace histogram [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 22:09:57,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:57,494 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:57,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:57,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1550668567, now seen corresponding path program 1 times [2019-11-06 22:09:57,496 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:57,496 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894914270] [2019-11-06 22:09:57,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 22:09:57,636 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894914270] [2019-11-06 22:09:57,636 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458013570] [2019-11-06 22:09:57,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:09:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:57,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:09:57,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-06 22:09:57,715 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:57,716 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-11-06 22:09:57,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840015751] [2019-11-06 22:09:57,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 22:09:57,717 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:57,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 22:09:57,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:09:57,717 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-11-06 22:09:57,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:57,849 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-11-06 22:09:57,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:09:57,850 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-11-06 22:09:57,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:57,851 INFO L225 Difference]: With dead ends: 55 [2019-11-06 22:09:57,851 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 22:09:57,852 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:09:57,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 22:09:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-06 22:09:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 22:09:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-06 22:09:57,858 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-11-06 22:09:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:57,858 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-06 22:09:57,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 22:09:57,859 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-06 22:09:57,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 22:09:57,860 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:57,860 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 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 22:09:58,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:58,064 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:58,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:58,065 INFO L82 PathProgramCache]: Analyzing trace with hash 948091209, now seen corresponding path program 2 times [2019-11-06 22:09:58,065 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:58,066 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696253832] [2019-11-06 22:09:58,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:58,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:58,170 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 22:09:58,170 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696253832] [2019-11-06 22:09:58,171 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40899611] [2019-11-06 22:09:58,171 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 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 22:09:58,249 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:09:58,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:09:58,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:09:58,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 22:09:58,278 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:58,278 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 22:09:58,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543156351] [2019-11-06 22:09:58,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:09:58,279 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:58,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:09:58,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:09:58,280 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-11-06 22:09:58,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:58,367 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-06 22:09:58,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:09:58,367 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-11-06 22:09:58,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:58,368 INFO L225 Difference]: With dead ends: 58 [2019-11-06 22:09:58,369 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 22:09:58,369 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 22:09:58,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 22:09:58,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-06 22:09:58,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 22:09:58,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-11-06 22:09:58,381 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-11-06 22:09:58,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:58,382 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-11-06 22:09:58,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:09:58,382 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-11-06 22:09:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 22:09:58,383 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:58,383 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 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 22:09:58,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:58,595 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:58,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:58,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1603223851, now seen corresponding path program 3 times [2019-11-06 22:09:58,597 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:58,599 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973359424] [2019-11-06 22:09:58,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 22:09:58,733 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973359424] [2019-11-06 22:09:58,734 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494873468] [2019-11-06 22:09:58,734 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 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 22:09:58,809 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 22:09:58,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:09:58,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:09:58,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-06 22:09:58,869 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:58,869 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 22:09:58,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400913781] [2019-11-06 22:09:58,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:09:58,870 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:58,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:09:58,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:09:58,871 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-11-06 22:09:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:58,993 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-11-06 22:09:58,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:09:58,994 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-11-06 22:09:58,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:58,995 INFO L225 Difference]: With dead ends: 63 [2019-11-06 22:09:58,995 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 22:09:58,996 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:09:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 22:09:59,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-06 22:09:59,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 22:09:59,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-06 22:09:59,010 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-11-06 22:09:59,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:59,010 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-06 22:09:59,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:09:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-06 22:09:59,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 22:09:59,011 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:59,012 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 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 22:09:59,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:59,212 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:59,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:59,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1402505333, now seen corresponding path program 4 times [2019-11-06 22:09:59,213 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:59,214 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495521124] [2019-11-06 22:09:59,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 22:09:59,321 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495521124] [2019-11-06 22:09:59,321 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47910582] [2019-11-06 22:09:59,321 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 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 22:09:59,387 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:09:59,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:09:59,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:09:59,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 22:09:59,422 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:59,422 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 22:09:59,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791365323] [2019-11-06 22:09:59,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:09:59,423 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:59,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:09:59,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:09:59,424 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-11-06 22:09:59,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:59,530 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-11-06 22:09:59,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:09:59,531 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-11-06 22:09:59,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:59,532 INFO L225 Difference]: With dead ends: 66 [2019-11-06 22:09:59,532 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 22:09:59,532 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 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 22:09:59,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 22:09:59,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-06 22:09:59,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 22:09:59,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-11-06 22:09:59,538 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-11-06 22:09:59,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:59,539 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-11-06 22:09:59,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:09:59,539 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-11-06 22:09:59,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 22:09:59,540 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:59,540 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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 22:09:59,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:59,744 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:59,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:59,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1995640301, now seen corresponding path program 5 times [2019-11-06 22:09:59,745 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:59,746 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752906566] [2019-11-06 22:09:59,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 22:09:59,877 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752906566] [2019-11-06 22:09:59,877 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014093625] [2019-11-06 22:09:59,878 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 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 22:09:59,998 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 22:09:59,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:09:59,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:10:00,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-06 22:10:00,042 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:00,042 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 22:10:00,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168292929] [2019-11-06 22:10:00,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:10:00,043 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:00,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:10:00,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:10:00,044 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-11-06 22:10:00,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:00,201 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-11-06 22:10:00,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:10:00,201 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-11-06 22:10:00,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:00,202 INFO L225 Difference]: With dead ends: 71 [2019-11-06 22:10:00,202 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 22:10:00,203 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 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 22:10:00,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 22:10:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-11-06 22:10:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-06 22:10:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-11-06 22:10:00,212 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-11-06 22:10:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:00,212 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-11-06 22:10:00,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:10:00,212 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-11-06 22:10:00,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 22:10:00,215 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:00,215 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 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 22:10:00,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:00,420 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:00,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:00,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1611767219, now seen corresponding path program 6 times [2019-11-06 22:10:00,420 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:00,420 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252138776] [2019-11-06 22:10:00,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-06 22:10:00,532 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252138776] [2019-11-06 22:10:00,532 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556564182] [2019-11-06 22:10:00,532 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 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 22:10:00,609 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 22:10:00,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:00,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:10:00,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-06 22:10:00,664 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:00,664 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-11-06 22:10:00,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057962770] [2019-11-06 22:10:00,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 22:10:00,665 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:00,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 22:10:00,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:10:00,666 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-11-06 22:10:00,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:00,836 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-11-06 22:10:00,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 22:10:00,837 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-11-06 22:10:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:00,837 INFO L225 Difference]: With dead ends: 77 [2019-11-06 22:10:00,837 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 22:10:00,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-11-06 22:10:00,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 22:10:00,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-11-06 22:10:00,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 22:10:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-11-06 22:10:00,843 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-11-06 22:10:00,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:00,843 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-11-06 22:10:00,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 22:10:00,843 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-11-06 22:10:00,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-06 22:10:00,844 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:00,845 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 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 22:10:01,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:01,049 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:01,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:01,050 INFO L82 PathProgramCache]: Analyzing trace with hash -133387091, now seen corresponding path program 7 times [2019-11-06 22:10:01,050 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:01,052 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186497020] [2019-11-06 22:10:01,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 22:10:01,202 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186497020] [2019-11-06 22:10:01,202 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312454235] [2019-11-06 22:10:01,202 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 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 22:10:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:01,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:10:01,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 22:10:01,298 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:01,298 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 22:10:01,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434298087] [2019-11-06 22:10:01,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:10:01,299 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:01,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:10:01,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:10:01,300 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-11-06 22:10:01,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:01,422 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-11-06 22:10:01,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:10:01,423 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-11-06 22:10:01,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:01,424 INFO L225 Difference]: With dead ends: 80 [2019-11-06 22:10:01,424 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 22:10:01,425 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 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 22:10:01,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 22:10:01,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-11-06 22:10:01,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 22:10:01,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-11-06 22:10:01,430 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-11-06 22:10:01,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:01,431 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-11-06 22:10:01,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:10:01,431 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-11-06 22:10:01,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-06 22:10:01,432 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:01,432 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 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 22:10:01,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:01,642 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:01,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:01,642 INFO L82 PathProgramCache]: Analyzing trace with hash -430428529, now seen corresponding path program 8 times [2019-11-06 22:10:01,642 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:01,643 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726295979] [2019-11-06 22:10:01,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 22:10:01,793 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726295979] [2019-11-06 22:10:01,793 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270944023] [2019-11-06 22:10:01,793 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 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 22:10:01,862 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:10:01,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:01,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:10:01,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 22:10:01,891 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:01,891 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 22:10:01,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252203227] [2019-11-06 22:10:01,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:10:01,892 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:01,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:10:01,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:10:01,894 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-11-06 22:10:02,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:02,003 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-11-06 22:10:02,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:10:02,003 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-11-06 22:10:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:02,005 INFO L225 Difference]: With dead ends: 82 [2019-11-06 22:10:02,006 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 22:10:02,007 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 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 22:10:02,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 22:10:02,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-06 22:10:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 22:10:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-11-06 22:10:02,015 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-11-06 22:10:02,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:02,015 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-11-06 22:10:02,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:10:02,015 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-11-06 22:10:02,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-06 22:10:02,019 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:02,019 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 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 22:10:02,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:02,220 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:02,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:02,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1875558385, now seen corresponding path program 9 times [2019-11-06 22:10:02,220 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:02,221 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335308458] [2019-11-06 22:10:02,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 22:10:02,375 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335308458] [2019-11-06 22:10:02,376 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110196443] [2019-11-06 22:10:02,376 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 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 22:10:02,449 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 22:10:02,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:02,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:10:02,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-11-06 22:10:02,515 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:02,515 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-11-06 22:10:02,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536198169] [2019-11-06 22:10:02,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 22:10:02,517 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:02,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 22:10:02,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:10:02,518 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-11-06 22:10:02,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:02,665 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-11-06 22:10:02,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 22:10:02,666 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-11-06 22:10:02,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:02,667 INFO L225 Difference]: With dead ends: 87 [2019-11-06 22:10:02,667 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 22:10:02,668 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 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 22:10:02,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 22:10:02,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-11-06 22:10:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 22:10:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-11-06 22:10:02,674 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-11-06 22:10:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:02,674 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-11-06 22:10:02,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 22:10:02,674 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-11-06 22:10:02,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-06 22:10:02,675 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:02,675 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 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 22:10:02,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:02,879 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:02,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:02,879 INFO L82 PathProgramCache]: Analyzing trace with hash 237602385, now seen corresponding path program 10 times [2019-11-06 22:10:02,879 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:02,880 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497831475] [2019-11-06 22:10:02,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 22:10:03,033 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497831475] [2019-11-06 22:10:03,034 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318875776] [2019-11-06 22:10:03,034 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 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 22:10:03,110 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:10:03,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:03,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:10:03,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-11-06 22:10:03,199 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:03,199 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-06 22:10:03,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916027245] [2019-11-06 22:10:03,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 22:10:03,200 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:03,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 22:10:03,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-11-06 22:10:03,201 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-11-06 22:10:03,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:03,458 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-11-06 22:10:03,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 22:10:03,459 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-11-06 22:10:03,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:03,460 INFO L225 Difference]: With dead ends: 93 [2019-11-06 22:10:03,460 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 22:10:03,461 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-11-06 22:10:03,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 22:10:03,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-11-06 22:10:03,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 22:10:03,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-11-06 22:10:03,467 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-11-06 22:10:03,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:03,467 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-11-06 22:10:03,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 22:10:03,467 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-11-06 22:10:03,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 22:10:03,468 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:03,468 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 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 22:10:03,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:03,673 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:03,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:03,673 INFO L82 PathProgramCache]: Analyzing trace with hash 537663665, now seen corresponding path program 11 times [2019-11-06 22:10:03,674 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:03,674 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065018239] [2019-11-06 22:10:03,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-11-06 22:10:03,870 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065018239] [2019-11-06 22:10:03,870 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158766735] [2019-11-06 22:10:03,870 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 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 22:10:04,047 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-06 22:10:04,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:04,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:10:04,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-11-06 22:10:04,129 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:04,129 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-11-06 22:10:04,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936153272] [2019-11-06 22:10:04,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 22:10:04,130 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:04,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 22:10:04,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-11-06 22:10:04,131 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-11-06 22:10:04,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:04,434 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-11-06 22:10:04,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 22:10:04,435 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-11-06 22:10:04,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:04,437 INFO L225 Difference]: With dead ends: 99 [2019-11-06 22:10:04,437 INFO L226 Difference]: Without dead ends: 67 [2019-11-06 22:10:04,438 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-11-06 22:10:04,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-06 22:10:04,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-11-06 22:10:04,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-06 22:10:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-11-06 22:10:04,445 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-11-06 22:10:04,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:04,445 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-11-06 22:10:04,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 22:10:04,446 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-11-06 22:10:04,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 22:10:04,447 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:04,447 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 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 22:10:04,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:04,664 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:04,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:04,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1797792017, now seen corresponding path program 12 times [2019-11-06 22:10:04,665 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:04,665 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828921363] [2019-11-06 22:10:04,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-11-06 22:10:04,872 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828921363] [2019-11-06 22:10:04,872 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738316191] [2019-11-06 22:10:04,872 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 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 22:10:04,980 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-06 22:10:04,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:04,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:10:04,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-11-06 22:10:05,047 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:05,047 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-11-06 22:10:05,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424745354] [2019-11-06 22:10:05,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 22:10:05,048 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:05,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 22:10:05,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 22:10:05,049 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-11-06 22:10:05,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:05,262 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-11-06 22:10:05,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 22:10:05,262 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-11-06 22:10:05,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:05,263 INFO L225 Difference]: With dead ends: 105 [2019-11-06 22:10:05,263 INFO L226 Difference]: Without dead ends: 71 [2019-11-06 22:10:05,264 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 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 22:10:05,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-06 22:10:05,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-11-06 22:10:05,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-06 22:10:05,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-11-06 22:10:05,269 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-11-06 22:10:05,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:05,270 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-11-06 22:10:05,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 22:10:05,270 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-11-06 22:10:05,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-06 22:10:05,271 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:05,271 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 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 22:10:05,475 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:05,476 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:05,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:05,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1464793713, now seen corresponding path program 13 times [2019-11-06 22:10:05,476 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:05,476 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882269214] [2019-11-06 22:10:05,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 22:10:05,680 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882269214] [2019-11-06 22:10:05,680 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150211056] [2019-11-06 22:10:05,681 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 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 22:10:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:05,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 22:10:05,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 22:10:05,821 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:05,821 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 22:10:05,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886235311] [2019-11-06 22:10:05,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 22:10:05,822 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:05,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 22:10:05,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 22:10:05,823 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-11-06 22:10:05,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:05,944 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-11-06 22:10:05,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 22:10:05,945 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-11-06 22:10:05,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:05,946 INFO L225 Difference]: With dead ends: 108 [2019-11-06 22:10:05,946 INFO L226 Difference]: Without dead ends: 72 [2019-11-06 22:10:05,946 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 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 22:10:05,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-06 22:10:05,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-11-06 22:10:05,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-06 22:10:05,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-11-06 22:10:05,956 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-11-06 22:10:05,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:05,956 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-11-06 22:10:05,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 22:10:05,957 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-11-06 22:10:05,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-06 22:10:05,958 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:05,959 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 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 22:10:06,163 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:06,163 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:06,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:06,163 INFO L82 PathProgramCache]: Analyzing trace with hash -238635693, now seen corresponding path program 14 times [2019-11-06 22:10:06,164 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:06,164 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748689043] [2019-11-06 22:10:06,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 22:10:06,385 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748689043] [2019-11-06 22:10:06,385 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842727643] [2019-11-06 22:10:06,385 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 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 22:10:06,466 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:10:06,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:06,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 22:10:06,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 22:10:06,489 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:06,489 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 22:10:06,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542489315] [2019-11-06 22:10:06,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 22:10:06,490 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:06,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 22:10:06,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 22:10:06,490 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-11-06 22:10:06,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:06,607 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-06 22:10:06,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 22:10:06,607 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-11-06 22:10:06,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:06,608 INFO L225 Difference]: With dead ends: 110 [2019-11-06 22:10:06,608 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 22:10:06,609 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 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 22:10:06,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 22:10:06,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-11-06 22:10:06,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-06 22:10:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-11-06 22:10:06,619 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-11-06 22:10:06,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:06,619 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-11-06 22:10:06,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 22:10:06,620 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-11-06 22:10:06,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-06 22:10:06,621 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:06,621 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 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 22:10:06,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:06,822 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:06,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:06,822 INFO L82 PathProgramCache]: Analyzing trace with hash -851755083, now seen corresponding path program 15 times [2019-11-06 22:10:06,823 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:06,823 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701399456] [2019-11-06 22:10:06,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 22:10:07,063 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701399456] [2019-11-06 22:10:07,063 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707988862] [2019-11-06 22:10:07,064 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 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 22:10:07,166 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 22:10:07,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:07,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:10:07,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-11-06 22:10:07,285 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:07,285 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-11-06 22:10:07,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778173705] [2019-11-06 22:10:07,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 22:10:07,288 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:07,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 22:10:07,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 22:10:07,288 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-11-06 22:10:07,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:07,515 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-11-06 22:10:07,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 22:10:07,515 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-11-06 22:10:07,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:07,516 INFO L225 Difference]: With dead ends: 115 [2019-11-06 22:10:07,516 INFO L226 Difference]: Without dead ends: 79 [2019-11-06 22:10:07,517 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 22:10:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-06 22:10:07,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-11-06 22:10:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 22:10:07,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-11-06 22:10:07,521 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-11-06 22:10:07,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:07,522 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-11-06 22:10:07,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 22:10:07,522 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-11-06 22:10:07,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 22:10:07,523 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:07,523 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 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 22:10:07,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:07,724 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:07,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:07,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1460436501, now seen corresponding path program 16 times [2019-11-06 22:10:07,725 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:07,726 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450136113] [2019-11-06 22:10:07,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 22:10:07,964 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450136113] [2019-11-06 22:10:07,964 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840760] [2019-11-06 22:10:07,965 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 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 22:10:08,063 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:10:08,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:08,065 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 22:10:08,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:08,109 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 22:10:08,110 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:08,110 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 22:10:08,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025480370] [2019-11-06 22:10:08,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 22:10:08,111 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:08,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 22:10:08,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 22:10:08,112 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-11-06 22:10:08,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:08,295 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-11-06 22:10:08,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 22:10:08,296 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-11-06 22:10:08,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:08,297 INFO L225 Difference]: With dead ends: 118 [2019-11-06 22:10:08,297 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 22:10:08,298 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 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 22:10:08,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 22:10:08,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-06 22:10:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-06 22:10:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-11-06 22:10:08,302 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-11-06 22:10:08,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:08,303 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-11-06 22:10:08,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 22:10:08,303 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-11-06 22:10:08,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 22:10:08,304 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:08,305 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 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 22:10:08,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:08,510 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:08,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:08,511 INFO L82 PathProgramCache]: Analyzing trace with hash 664024823, now seen corresponding path program 17 times [2019-11-06 22:10:08,511 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:08,512 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204112949] [2019-11-06 22:10:08,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 22:10:08,743 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204112949] [2019-11-06 22:10:08,743 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246101392] [2019-11-06 22:10:08,744 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 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 22:10:10,492 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-06 22:10:10,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:10,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:10:10,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-11-06 22:10:10,597 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:10,597 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-06 22:10:10,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330861639] [2019-11-06 22:10:10,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 22:10:10,598 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:10,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 22:10:10,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-11-06 22:10:10,598 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-11-06 22:10:10,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:10,987 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-11-06 22:10:10,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 22:10:10,988 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-11-06 22:10:10,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:10,989 INFO L225 Difference]: With dead ends: 123 [2019-11-06 22:10:10,990 INFO L226 Difference]: Without dead ends: 85 [2019-11-06 22:10:10,991 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 22:10:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-06 22:10:10,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-11-06 22:10:10,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-06 22:10:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-11-06 22:10:10,996 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-11-06 22:10:10,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:10,996 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-11-06 22:10:10,996 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 22:10:10,996 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-11-06 22:10:10,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-06 22:10:10,997 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:10,998 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 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 22:10:11,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:11,212 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:11,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:11,213 INFO L82 PathProgramCache]: Analyzing trace with hash -683189417, now seen corresponding path program 18 times [2019-11-06 22:10:11,213 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:11,213 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403707463] [2019-11-06 22:10:11,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:11,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-06 22:10:11,575 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403707463] [2019-11-06 22:10:11,575 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520144167] [2019-11-06 22:10:11,575 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 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 22:10:11,953 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 22:10:11,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:11,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 22:10:11,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 234 proven. 25 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-11-06 22:10:12,065 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:12,065 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2019-11-06 22:10:12,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323875385] [2019-11-06 22:10:12,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 22:10:12,066 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:12,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 22:10:12,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-11-06 22:10:12,067 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 28 states. [2019-11-06 22:10:12,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:12,353 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-11-06 22:10:12,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 22:10:12,356 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 120 [2019-11-06 22:10:12,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:12,356 INFO L225 Difference]: With dead ends: 129 [2019-11-06 22:10:12,357 INFO L226 Difference]: Without dead ends: 89 [2019-11-06 22:10:12,357 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-11-06 22:10:12,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-06 22:10:12,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-11-06 22:10:12,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-06 22:10:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-11-06 22:10:12,363 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 120 [2019-11-06 22:10:12,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:12,363 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-11-06 22:10:12,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 22:10:12,363 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-11-06 22:10:12,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 22:10:12,364 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:12,365 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 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 22:10:12,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:12,569 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:12,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:12,570 INFO L82 PathProgramCache]: Analyzing trace with hash 272373175, now seen corresponding path program 19 times [2019-11-06 22:10:12,570 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:12,571 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257217381] [2019-11-06 22:10:12,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:12,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 22:10:12,906 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257217381] [2019-11-06 22:10:12,906 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966638834] [2019-11-06 22:10:12,906 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 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 22:10:13,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:13,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 22:10:13,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 22:10:13,056 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:13,056 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-11-06 22:10:13,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061964151] [2019-11-06 22:10:13,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 22:10:13,057 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:13,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 22:10:13,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 22:10:13,058 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 24 states. [2019-11-06 22:10:13,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:13,222 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2019-11-06 22:10:13,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 22:10:13,223 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 124 [2019-11-06 22:10:13,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:13,224 INFO L225 Difference]: With dead ends: 132 [2019-11-06 22:10:13,224 INFO L226 Difference]: Without dead ends: 90 [2019-11-06 22:10:13,225 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 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 22:10:13,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-06 22:10:13,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-11-06 22:10:13,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-06 22:10:13,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-11-06 22:10:13,230 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 124 [2019-11-06 22:10:13,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:13,230 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-11-06 22:10:13,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 22:10:13,230 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-11-06 22:10:13,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 22:10:13,231 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:13,231 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 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 22:10:13,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:13,433 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:13,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:13,434 INFO L82 PathProgramCache]: Analyzing trace with hash -258630887, now seen corresponding path program 20 times [2019-11-06 22:10:13,434 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:13,435 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313722597] [2019-11-06 22:10:13,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 22:10:13,747 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313722597] [2019-11-06 22:10:13,748 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687569192] [2019-11-06 22:10:13,748 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 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 22:10:13,880 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:10:13,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:13,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 22:10:13,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 22:10:13,937 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:13,938 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-11-06 22:10:13,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963782363] [2019-11-06 22:10:13,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 22:10:13,939 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:13,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 22:10:13,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 22:10:13,940 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 25 states. [2019-11-06 22:10:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:14,222 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-11-06 22:10:14,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 22:10:14,223 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-11-06 22:10:14,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:14,224 INFO L225 Difference]: With dead ends: 134 [2019-11-06 22:10:14,225 INFO L226 Difference]: Without dead ends: 92 [2019-11-06 22:10:14,226 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 22:10:14,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-06 22:10:14,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-11-06 22:10:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-06 22:10:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-11-06 22:10:14,232 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-11-06 22:10:14,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:14,233 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-11-06 22:10:14,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 22:10:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-11-06 22:10:14,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-06 22:10:14,236 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:14,236 INFO L410 BasicCegarLoop]: trace histogram [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 22:10:14,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:14,437 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:14,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:14,438 INFO L82 PathProgramCache]: Analyzing trace with hash 547573755, now seen corresponding path program 21 times [2019-11-06 22:10:14,438 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:14,439 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318599491] [2019-11-06 22:10:14,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 22:10:14,982 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318599491] [2019-11-06 22:10:14,982 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590046896] [2019-11-06 22:10:14,982 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 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 22:10:15,181 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-06 22:10:15,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:15,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:10:15,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-11-06 22:10:15,336 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:15,336 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2019-11-06 22:10:15,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942689392] [2019-11-06 22:10:15,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-06 22:10:15,337 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:15,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-06 22:10:15,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-11-06 22:10:15,338 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 32 states. [2019-11-06 22:10:15,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:15,682 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-06 22:10:15,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 22:10:15,683 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2019-11-06 22:10:15,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:15,684 INFO L225 Difference]: With dead ends: 139 [2019-11-06 22:10:15,684 INFO L226 Difference]: Without dead ends: 97 [2019-11-06 22:10:15,685 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-11-06 22:10:15,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-06 22:10:15,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-11-06 22:10:15,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-06 22:10:15,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2019-11-06 22:10:15,691 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 128 [2019-11-06 22:10:15,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:15,691 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2019-11-06 22:10:15,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-06 22:10:15,692 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2019-11-06 22:10:15,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 22:10:15,693 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:15,693 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 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 22:10:15,896 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:15,897 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:15,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:15,897 INFO L82 PathProgramCache]: Analyzing trace with hash -829264037, now seen corresponding path program 22 times [2019-11-06 22:10:15,897 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:15,897 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079632909] [2019-11-06 22:10:15,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 22:10:16,198 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079632909] [2019-11-06 22:10:16,198 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422143163] [2019-11-06 22:10:16,198 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 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 22:10:16,313 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:10:16,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:16,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 22:10:16,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 22:10:16,354 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:16,354 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-11-06 22:10:16,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590692694] [2019-11-06 22:10:16,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 22:10:16,355 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:16,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 22:10:16,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 22:10:16,356 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 27 states. [2019-11-06 22:10:16,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:16,579 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-06 22:10:16,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 22:10:16,580 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2019-11-06 22:10:16,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:16,580 INFO L225 Difference]: With dead ends: 142 [2019-11-06 22:10:16,580 INFO L226 Difference]: Without dead ends: 98 [2019-11-06 22:10:16,581 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 22:10:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-06 22:10:16,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-11-06 22:10:16,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-06 22:10:16,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-11-06 22:10:16,589 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 132 [2019-11-06 22:10:16,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:16,589 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-11-06 22:10:16,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 22:10:16,590 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-11-06 22:10:16,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 22:10:16,590 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:16,591 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 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 22:10:16,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:16,794 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:16,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:16,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1781960003, now seen corresponding path program 23 times [2019-11-06 22:10:16,795 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:16,795 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072036753] [2019-11-06 22:10:16,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 22:10:17,323 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072036753] [2019-11-06 22:10:17,323 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796030969] [2019-11-06 22:10:17,323 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 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 22:10:20,772 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-11-06 22:10:20,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:20,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:10:20,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2019-11-06 22:10:20,907 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:20,907 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-11-06 22:10:20,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144985533] [2019-11-06 22:10:20,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-06 22:10:20,908 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:20,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-06 22:10:20,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=819, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 22:10:20,909 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 35 states. [2019-11-06 22:10:21,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:21,346 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2019-11-06 22:10:21,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-06 22:10:21,347 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2019-11-06 22:10:21,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:21,348 INFO L225 Difference]: With dead ends: 147 [2019-11-06 22:10:21,348 INFO L226 Difference]: Without dead ends: 103 [2019-11-06 22:10:21,350 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=1347, Unknown=0, NotChecked=0, Total=1806 [2019-11-06 22:10:21,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-06 22:10:21,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-11-06 22:10:21,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-06 22:10:21,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-11-06 22:10:21,355 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 134 [2019-11-06 22:10:21,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:21,355 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-11-06 22:10:21,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-06 22:10:21,355 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-11-06 22:10:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-06 22:10:21,356 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:21,357 INFO L410 BasicCegarLoop]: trace histogram [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 22:10:21,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:21,560 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:21,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:21,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1049703197, now seen corresponding path program 24 times [2019-11-06 22:10:21,560 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:21,561 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773829911] [2019-11-06 22:10:21,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-11-06 22:10:22,134 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773829911] [2019-11-06 22:10:22,135 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669525951] [2019-11-06 22:10:22,135 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 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 22:10:24,322 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-06 22:10:24,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:24,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 22:10:24,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 298 proven. 49 refuted. 0 times theorem prover too weak. 917 trivial. 0 not checked. [2019-11-06 22:10:24,466 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:24,466 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-11-06 22:10:24,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925136349] [2019-11-06 22:10:24,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-06 22:10:24,467 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:24,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-06 22:10:24,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 22:10:24,468 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 36 states. [2019-11-06 22:10:24,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:24,764 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2019-11-06 22:10:24,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-06 22:10:24,765 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 142 [2019-11-06 22:10:24,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:24,766 INFO L225 Difference]: With dead ends: 153 [2019-11-06 22:10:24,766 INFO L226 Difference]: Without dead ends: 107 [2019-11-06 22:10:24,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 22:10:24,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-06 22:10:24,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-11-06 22:10:24,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-06 22:10:24,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-11-06 22:10:24,773 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 142 [2019-11-06 22:10:24,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:24,773 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-11-06 22:10:24,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-06 22:10:24,773 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-11-06 22:10:24,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-06 22:10:24,774 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:24,775 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 8, 8, 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 22:10:24,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:24,980 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:24,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:24,981 INFO L82 PathProgramCache]: Analyzing trace with hash -932737411, now seen corresponding path program 25 times [2019-11-06 22:10:24,981 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:24,982 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917935601] [2019-11-06 22:10:24,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 22:10:25,419 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917935601] [2019-11-06 22:10:25,419 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550666174] [2019-11-06 22:10:25,420 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 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 22:10:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:25,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-06 22:10:25,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 22:10:25,576 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:25,576 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-11-06 22:10:25,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927415738] [2019-11-06 22:10:25,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-06 22:10:25,577 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:25,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-06 22:10:25,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 22:10:25,578 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 30 states. [2019-11-06 22:10:25,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:25,813 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2019-11-06 22:10:25,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-06 22:10:25,814 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 146 [2019-11-06 22:10:25,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:25,815 INFO L225 Difference]: With dead ends: 156 [2019-11-06 22:10:25,815 INFO L226 Difference]: Without dead ends: 108 [2019-11-06 22:10:25,817 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 22:10:25,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-06 22:10:25,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-11-06 22:10:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-06 22:10:25,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-11-06 22:10:25,821 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 146 [2019-11-06 22:10:25,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:25,821 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-11-06 22:10:25,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-06 22:10:25,821 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-11-06 22:10:25,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-06 22:10:25,822 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:25,822 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 8, 8, 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 22:10:26,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:26,023 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:26,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:26,024 INFO L82 PathProgramCache]: Analyzing trace with hash 463208031, now seen corresponding path program 26 times [2019-11-06 22:10:26,024 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:26,024 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872023831] [2019-11-06 22:10:26,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 22:10:26,538 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872023831] [2019-11-06 22:10:26,538 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389388968] [2019-11-06 22:10:26,538 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 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 22:10:26,720 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:10:26,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:26,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-06 22:10:26,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 22:10:26,768 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:26,768 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-11-06 22:10:26,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850140392] [2019-11-06 22:10:26,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-06 22:10:26,769 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:26,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-06 22:10:26,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 22:10:26,770 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 31 states. [2019-11-06 22:10:26,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:26,963 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-11-06 22:10:26,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 22:10:26,963 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 148 [2019-11-06 22:10:26,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:26,965 INFO L225 Difference]: With dead ends: 158 [2019-11-06 22:10:26,965 INFO L226 Difference]: Without dead ends: 110 [2019-11-06 22:10:26,966 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 22:10:26,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-06 22:10:26,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-11-06 22:10:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-06 22:10:26,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-11-06 22:10:26,972 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 148 [2019-11-06 22:10:26,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:26,972 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-11-06 22:10:26,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-06 22:10:26,972 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-11-06 22:10:26,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-06 22:10:26,974 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:26,974 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 8, 8, 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 22:10:27,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:27,180 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:27,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:27,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1936981441, now seen corresponding path program 27 times [2019-11-06 22:10:27,180 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:27,181 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706068472] [2019-11-06 22:10:27,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 22:10:27,640 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706068472] [2019-11-06 22:10:27,640 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439869529] [2019-11-06 22:10:27,641 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 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 22:10:27,868 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-06 22:10:27,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:27,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:10:27,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2019-11-06 22:10:28,143 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:28,144 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2019-11-06 22:10:28,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204514240] [2019-11-06 22:10:28,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-06 22:10:28,145 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:28,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-06 22:10:28,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1069, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 22:10:28,146 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 40 states. [2019-11-06 22:10:28,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:28,705 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2019-11-06 22:10:28,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-06 22:10:28,705 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 150 [2019-11-06 22:10:28,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:28,706 INFO L225 Difference]: With dead ends: 163 [2019-11-06 22:10:28,706 INFO L226 Difference]: Without dead ends: 115 [2019-11-06 22:10:28,708 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=599, Invalid=1753, Unknown=0, NotChecked=0, Total=2352 [2019-11-06 22:10:28,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-06 22:10:28,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-11-06 22:10:28,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-06 22:10:28,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-11-06 22:10:28,713 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 150 [2019-11-06 22:10:28,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:28,714 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-11-06 22:10:28,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-06 22:10:28,714 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-11-06 22:10:28,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-06 22:10:28,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:28,715 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 8, 8, 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 22:10:28,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:28,923 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:28,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:28,923 INFO L82 PathProgramCache]: Analyzing trace with hash 495191585, now seen corresponding path program 28 times [2019-11-06 22:10:28,924 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:28,924 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872131392] [2019-11-06 22:10:28,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2019-11-06 22:10:29,452 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872131392] [2019-11-06 22:10:29,452 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269586823] [2019-11-06 22:10:29,453 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:29,589 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:10:29,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:29,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:10:29,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2019-11-06 22:10:29,836 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:29,836 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-11-06 22:10:29,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131804014] [2019-11-06 22:10:29,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-06 22:10:29,837 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:29,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-06 22:10:29,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1190, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 22:10:29,838 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 42 states. [2019-11-06 22:10:30,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:30,295 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2019-11-06 22:10:30,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-06 22:10:30,295 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2019-11-06 22:10:30,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:30,296 INFO L225 Difference]: With dead ends: 169 [2019-11-06 22:10:30,296 INFO L226 Difference]: Without dead ends: 119 [2019-11-06 22:10:30,297 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2019-11-06 22:10:30,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-06 22:10:30,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2019-11-06 22:10:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-06 22:10:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2019-11-06 22:10:30,303 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 158 [2019-11-06 22:10:30,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:30,303 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2019-11-06 22:10:30,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-06 22:10:30,303 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2019-11-06 22:10:30,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-06 22:10:30,304 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:30,305 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 8, 8, 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 22:10:30,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:30,509 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:30,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:30,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1033632639, now seen corresponding path program 29 times [2019-11-06 22:10:30,510 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:30,511 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251072888] [2019-11-06 22:10:30,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-11-06 22:10:30,978 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251072888] [2019-11-06 22:10:30,978 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271120664] [2019-11-06 22:10:30,978 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true