java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/mapsum1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 12:02:58,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 12:02:58,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 12:02:58,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 12:02:58,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 12:02:58,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 12:02:58,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 12:02:58,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 12:02:58,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 12:02:58,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 12:02:58,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 12:02:58,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 12:02:58,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 12:02:58,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 12:02:58,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 12:02:58,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 12:02:58,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 12:02:58,530 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 12:02:58,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 12:02:58,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 12:02:58,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 12:02:58,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 12:02:58,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 12:02:58,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 12:02:58,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 12:02:58,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 12:02:58,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 12:02:58,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 12:02:58,551 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-07 12:02:58,566 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 12:02:58,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 12:02:58,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 12:02:58,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 12:02:58,568 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 12:02:58,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 12:02:58,568 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 12:02:58,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 12:02:58,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 12:02:58,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 12:02:58,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 12:02:58,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 12:02:58,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 12:02:58,569 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 12:02:58,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 12:02:58,570 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 12:02:58,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 12:02:58,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 12:02:58,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 12:02:58,571 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 12:02:58,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 12:02:58,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 12:02:58,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 12:02:58,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 12:02:58,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 12:02:58,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 12:02:58,572 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 12:02:58,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 12:02:58,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 12:02:58,601 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 12:02:58,613 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 12:02:58,617 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 12:02:58,619 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 12:02:58,619 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 12:02:58,620 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapsum1.i [2019-09-07 12:02:58,684 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9061dbe4b/58d7c67b75b347adb8ae7edf3c67c9cb/FLAG33f9d91b0 [2019-09-07 12:02:59,202 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 12:02:59,204 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapsum1.i [2019-09-07 12:02:59,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9061dbe4b/58d7c67b75b347adb8ae7edf3c67c9cb/FLAG33f9d91b0 [2019-09-07 12:02:59,594 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9061dbe4b/58d7c67b75b347adb8ae7edf3c67c9cb [2019-09-07 12:02:59,605 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 12:02:59,607 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 12:02:59,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 12:02:59,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 12:02:59,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 12:02:59,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 12:02:59" (1/1) ... [2019-09-07 12:02:59,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f002b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:02:59, skipping insertion in model container [2019-09-07 12:02:59,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 12:02:59" (1/1) ... [2019-09-07 12:02:59,623 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 12:02:59,646 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 12:02:59,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 12:02:59,868 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 12:02:59,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 12:02:59,905 INFO L192 MainTranslator]: Completed translation [2019-09-07 12:02:59,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:02:59 WrapperNode [2019-09-07 12:02:59,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 12:02:59,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 12:02:59,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 12:02:59,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 12:03:00,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:02:59" (1/1) ... [2019-09-07 12:03:00,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:02:59" (1/1) ... [2019-09-07 12:03:00,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:02:59" (1/1) ... [2019-09-07 12:03:00,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:02:59" (1/1) ... [2019-09-07 12:03:00,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:02:59" (1/1) ... [2019-09-07 12:03:00,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:02:59" (1/1) ... [2019-09-07 12:03:00,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:02:59" (1/1) ... [2019-09-07 12:03:00,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 12:03:00,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 12:03:00,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 12:03:00,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 12:03:00,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:02:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 12:03:00,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 12:03:00,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 12:03:00,095 INFO L138 BoogieDeclarations]: Found implementation of procedure mapsum [2019-09-07 12:03:00,096 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 12:03:00,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 12:03:00,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 12:03:00,096 INFO L130 BoogieDeclarations]: Found specification of procedure mapsum [2019-09-07 12:03:00,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 12:03:00,096 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 12:03:00,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 12:03:00,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 12:03:00,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 12:03:00,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 12:03:00,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 12:03:00,428 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 12:03:00,429 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-07 12:03:00,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 12:03:00 BoogieIcfgContainer [2019-09-07 12:03:00,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 12:03:00,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 12:03:00,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 12:03:00,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 12:03:00,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 12:02:59" (1/3) ... [2019-09-07 12:03:00,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9d0e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 12:03:00, skipping insertion in model container [2019-09-07 12:03:00,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:02:59" (2/3) ... [2019-09-07 12:03:00,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9d0e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 12:03:00, skipping insertion in model container [2019-09-07 12:03:00,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 12:03:00" (3/3) ... [2019-09-07 12:03:00,439 INFO L109 eAbstractionObserver]: Analyzing ICFG mapsum1.i [2019-09-07 12:03:00,447 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 12:03:00,453 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 12:03:00,470 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 12:03:00,502 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 12:03:00,502 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 12:03:00,503 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 12:03:00,503 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 12:03:00,503 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 12:03:00,503 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 12:03:00,503 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 12:03:00,503 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 12:03:00,503 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 12:03:00,521 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-09-07 12:03:00,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 12:03:00,529 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:00,530 INFO L399 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] [2019-09-07 12:03:00,532 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:00,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:00,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1283808693, now seen corresponding path program 1 times [2019-09-07 12:03:00,540 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:00,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:00,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:00,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:03:00,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-07 12:03:00,703 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:03:00,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 12:03:00,707 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 12:03:00,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 12:03:00,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 12:03:00,726 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2019-09-07 12:03:00,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:00,755 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-09-07 12:03:00,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 12:03:00,757 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2019-09-07 12:03:00,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:00,767 INFO L225 Difference]: With dead ends: 54 [2019-09-07 12:03:00,768 INFO L226 Difference]: Without dead ends: 26 [2019-09-07 12:03:00,772 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 12:03:00,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-07 12:03:00,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-09-07 12:03:00,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-07 12:03:00,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-09-07 12:03:00,825 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-09-07 12:03:00,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:00,826 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-09-07 12:03:00,826 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 12:03:00,826 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-09-07 12:03:00,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 12:03:00,829 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:00,829 INFO L399 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] [2019-09-07 12:03:00,830 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:00,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:00,832 INFO L82 PathProgramCache]: Analyzing trace with hash 721846027, now seen corresponding path program 1 times [2019-09-07 12:03:00,833 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:00,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:00,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:00,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:03:00,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-07 12:03:01,002 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:03:01,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 12:03:01,006 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 12:03:01,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 12:03:01,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 12:03:01,009 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-09-07 12:03:01,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:01,048 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-09-07 12:03:01,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 12:03:01,053 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-09-07 12:03:01,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:01,054 INFO L225 Difference]: With dead ends: 46 [2019-09-07 12:03:01,054 INFO L226 Difference]: Without dead ends: 28 [2019-09-07 12:03:01,056 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 12:03:01,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-07 12:03:01,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-09-07 12:03:01,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-07 12:03:01,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-09-07 12:03:01,075 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-09-07 12:03:01,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:01,076 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-09-07 12:03:01,076 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 12:03:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-09-07 12:03:01,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-07 12:03:01,079 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:01,081 INFO L399 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] [2019-09-07 12:03:01,082 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:01,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:01,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1487444845, now seen corresponding path program 1 times [2019-09-07 12:03:01,083 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:01,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:01,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:01,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:03:01,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-07 12:03:01,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:01,205 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:01,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:03:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:01,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-09-07 12:03:01,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-07 12:03:01,355 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:03:01,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-09-07 12:03:01,358 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 12:03:01,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 12:03:01,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:03:01,367 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 4 states. [2019-09-07 12:03:01,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:01,400 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-09-07 12:03:01,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 12:03:01,401 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-09-07 12:03:01,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:01,403 INFO L225 Difference]: With dead ends: 46 [2019-09-07 12:03:01,403 INFO L226 Difference]: Without dead ends: 29 [2019-09-07 12:03:01,404 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:03:01,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-07 12:03:01,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-09-07 12:03:01,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-07 12:03:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-09-07 12:03:01,411 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-09-07 12:03:01,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:01,411 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-09-07 12:03:01,411 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 12:03:01,412 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-09-07 12:03:01,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-07 12:03:01,413 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:01,413 INFO L399 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] [2019-09-07 12:03:01,414 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:01,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:01,414 INFO L82 PathProgramCache]: Analyzing trace with hash 2063023467, now seen corresponding path program 1 times [2019-09-07 12:03:01,414 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:01,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:01,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:01,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:03:01,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 12:03:01,513 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:03:01,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 12:03:01,514 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 12:03:01,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 12:03:01,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 12:03:01,515 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-09-07 12:03:01,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:01,536 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-09-07 12:03:01,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 12:03:01,537 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-09-07 12:03:01,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:01,538 INFO L225 Difference]: With dead ends: 43 [2019-09-07 12:03:01,538 INFO L226 Difference]: Without dead ends: 30 [2019-09-07 12:03:01,539 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 12:03:01,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-07 12:03:01,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-09-07 12:03:01,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-07 12:03:01,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-09-07 12:03:01,546 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-09-07 12:03:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:01,548 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-09-07 12:03:01,548 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 12:03:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-09-07 12:03:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-07 12:03:01,550 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:01,550 INFO L399 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] [2019-09-07 12:03:01,551 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:01,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:01,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1550668567, now seen corresponding path program 1 times [2019-09-07 12:03:01,551 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:01,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:01,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:01,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:03:01,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 12:03:01,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:01,631 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:03:01,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:01,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 12:03:01,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 12:03:01,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:01,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 12:03:01,746 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 12:03:01,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 12:03:01,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:03:01,747 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2019-09-07 12:03:01,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:01,778 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2019-09-07 12:03:01,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 12:03:01,780 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-09-07 12:03:01,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:01,781 INFO L225 Difference]: With dead ends: 52 [2019-09-07 12:03:01,781 INFO L226 Difference]: Without dead ends: 32 [2019-09-07 12:03:01,782 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:03:01,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-07 12:03:01,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-09-07 12:03:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-07 12:03:01,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-09-07 12:03:01,795 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 42 [2019-09-07 12:03:01,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:01,796 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-09-07 12:03:01,796 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 12:03:01,796 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-09-07 12:03:01,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-07 12:03:01,798 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:01,798 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:03:01,799 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:01,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:01,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1311885621, now seen corresponding path program 2 times [2019-09-07 12:03:01,799 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:01,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:01,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:01,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:03:01,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 12:03:01,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:01,939 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:01,960 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:03:02,007 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:03:02,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:02,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 12:03:02,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (4)] Exception during sending of exit command (exit): Stream closed [2019-09-07 12:03:02,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:02,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-07 12:03:02,045 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 12:03:02,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 12:03:02,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:03:02,046 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2019-09-07 12:03:02,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:02,095 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-09-07 12:03:02,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 12:03:02,096 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2019-09-07 12:03:02,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:02,097 INFO L225 Difference]: With dead ends: 54 [2019-09-07 12:03:02,097 INFO L226 Difference]: Without dead ends: 34 [2019-09-07 12:03:02,100 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:03:02,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-07 12:03:02,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-09-07 12:03:02,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-07 12:03:02,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-09-07 12:03:02,115 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 44 [2019-09-07 12:03:02,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:02,116 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-09-07 12:03:02,116 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 12:03:02,116 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-09-07 12:03:02,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-07 12:03:02,118 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:02,118 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:03:02,121 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:02,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:02,122 INFO L82 PathProgramCache]: Analyzing trace with hash 525258797, now seen corresponding path program 3 times [2019-09-07 12:03:02,122 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:02,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:02,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:02,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:02,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-09-07 12:03:02,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:02,199 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:02,219 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:03:02,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-07 12:03:02,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:02,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 12:03:02,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-09-07 12:03:02,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:02,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-09-07 12:03:02,280 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 12:03:02,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 12:03:02,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:03:02,281 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2019-09-07 12:03:02,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:02,325 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2019-09-07 12:03:02,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 12:03:02,327 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2019-09-07 12:03:02,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:02,328 INFO L225 Difference]: With dead ends: 58 [2019-09-07 12:03:02,328 INFO L226 Difference]: Without dead ends: 39 [2019-09-07 12:03:02,329 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:03:02,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-07 12:03:02,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-09-07 12:03:02,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-07 12:03:02,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-09-07 12:03:02,335 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 46 [2019-09-07 12:03:02,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:02,336 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-09-07 12:03:02,336 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 12:03:02,336 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-09-07 12:03:02,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-07 12:03:02,337 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:02,337 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:03:02,338 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:02,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:02,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1887809705, now seen corresponding path program 4 times [2019-09-07 12:03:02,338 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:02,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:02,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:02,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:02,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-09-07 12:03:02,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:02,418 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:02,438 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:03:02,482 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:03:02,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:02,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 12:03:02,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-09-07 12:03:02,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:02,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 12:03:02,527 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 12:03:02,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 12:03:02,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 12:03:02,528 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 7 states. [2019-09-07 12:03:02,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:02,568 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2019-09-07 12:03:02,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 12:03:02,569 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2019-09-07 12:03:02,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:02,570 INFO L225 Difference]: With dead ends: 64 [2019-09-07 12:03:02,570 INFO L226 Difference]: Without dead ends: 40 [2019-09-07 12:03:02,571 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 12:03:02,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-07 12:03:02,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-09-07 12:03:02,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-07 12:03:02,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-09-07 12:03:02,583 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 54 [2019-09-07 12:03:02,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:02,583 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-09-07 12:03:02,583 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 12:03:02,583 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-09-07 12:03:02,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-07 12:03:02,587 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:02,587 INFO L399 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] [2019-09-07 12:03:02,587 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:02,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:02,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1402505333, now seen corresponding path program 5 times [2019-09-07 12:03:02,588 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:02,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:02,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:02,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:02,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-09-07 12:03:02,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:02,690 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:03:02,715 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:02,776 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-07 12:03:02,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:02,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 12:03:02,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-09-07 12:03:02,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:02,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-07 12:03:02,827 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 12:03:02,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 12:03:02,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 12:03:02,828 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 8 states. [2019-09-07 12:03:02,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:02,889 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2019-09-07 12:03:02,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 12:03:02,889 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2019-09-07 12:03:02,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:02,891 INFO L225 Difference]: With dead ends: 68 [2019-09-07 12:03:02,891 INFO L226 Difference]: Without dead ends: 45 [2019-09-07 12:03:02,892 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 12:03:02,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-07 12:03:02,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2019-09-07 12:03:02,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-07 12:03:02,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-09-07 12:03:02,898 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 56 [2019-09-07 12:03:02,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:02,899 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-09-07 12:03:02,899 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 12:03:02,899 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-09-07 12:03:02,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-07 12:03:02,901 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:02,901 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 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] [2019-09-07 12:03:02,902 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:02,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:02,902 INFO L82 PathProgramCache]: Analyzing trace with hash 546662663, now seen corresponding path program 6 times [2019-09-07 12:03:02,902 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:02,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:02,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:02,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:02,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:02,985 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-09-07 12:03:02,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:02,986 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:03:03,030 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:03,094 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-07 12:03:03,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:03,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 12:03:03,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-09-07 12:03:03,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:03,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-09-07 12:03:03,152 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 12:03:03,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 12:03:03,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-09-07 12:03:03,153 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 11 states. [2019-09-07 12:03:03,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:03,223 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-09-07 12:03:03,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 12:03:03,224 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2019-09-07 12:03:03,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:03,225 INFO L225 Difference]: With dead ends: 77 [2019-09-07 12:03:03,225 INFO L226 Difference]: Without dead ends: 49 [2019-09-07 12:03:03,226 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-09-07 12:03:03,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-07 12:03:03,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2019-09-07 12:03:03,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-07 12:03:03,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-09-07 12:03:03,239 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 64 [2019-09-07 12:03:03,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:03,239 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-09-07 12:03:03,240 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 12:03:03,240 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-09-07 12:03:03,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-07 12:03:03,243 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:03,246 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 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] [2019-09-07 12:03:03,246 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:03,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:03,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1619660647, now seen corresponding path program 7 times [2019-09-07 12:03:03,247 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:03,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:03,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:03,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:03,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2019-09-07 12:03:03,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:03,346 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:03:03,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:03,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 12:03:03,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-09-07 12:03:03,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:03,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2019-09-07 12:03:03,545 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 12:03:03,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 12:03:03,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-09-07 12:03:03,546 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 12 states. [2019-09-07 12:03:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:03,619 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2019-09-07 12:03:03,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 12:03:03,620 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2019-09-07 12:03:03,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:03,621 INFO L225 Difference]: With dead ends: 83 [2019-09-07 12:03:03,621 INFO L226 Difference]: Without dead ends: 53 [2019-09-07 12:03:03,622 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-09-07 12:03:03,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-07 12:03:03,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2019-09-07 12:03:03,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-07 12:03:03,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-09-07 12:03:03,639 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 72 [2019-09-07 12:03:03,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:03,640 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-09-07 12:03:03,640 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 12:03:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-09-07 12:03:03,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-07 12:03:03,641 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:03,641 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:03:03,641 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:03,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:03,642 INFO L82 PathProgramCache]: Analyzing trace with hash 964116935, now seen corresponding path program 8 times [2019-09-07 12:03:03,642 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:03,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:03,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:03,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:03:03,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-09-07 12:03:03,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:03,746 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:03:03,764 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:03,814 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:03:03,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:03,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 12:03:03,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-09-07 12:03:03,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:03,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2019-09-07 12:03:03,949 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 12:03:03,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 12:03:03,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-09-07 12:03:03,950 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 14 states. [2019-09-07 12:03:04,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:04,039 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2019-09-07 12:03:04,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 12:03:04,042 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2019-09-07 12:03:04,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:04,043 INFO L225 Difference]: With dead ends: 89 [2019-09-07 12:03:04,044 INFO L226 Difference]: Without dead ends: 57 [2019-09-07 12:03:04,047 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-09-07 12:03:04,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-07 12:03:04,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2019-09-07 12:03:04,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-07 12:03:04,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2019-09-07 12:03:04,057 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 76 [2019-09-07 12:03:04,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:04,057 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2019-09-07 12:03:04,057 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 12:03:04,058 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2019-09-07 12:03:04,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-07 12:03:04,063 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:04,063 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 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] [2019-09-07 12:03:04,064 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:04,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:04,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1800824025, now seen corresponding path program 9 times [2019-09-07 12:03:04,065 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:04,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:04,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:04,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:04,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2019-09-07 12:03:04,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:04,214 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:04,237 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:03:04,291 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-07 12:03:04,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:04,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 12:03:04,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:03:04,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:04,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-09-07 12:03:04,363 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 12:03:04,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 12:03:04,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-09-07 12:03:04,364 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 13 states. [2019-09-07 12:03:04,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:04,441 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2019-09-07 12:03:04,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 12:03:04,442 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2019-09-07 12:03:04,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:04,443 INFO L225 Difference]: With dead ends: 94 [2019-09-07 12:03:04,443 INFO L226 Difference]: Without dead ends: 61 [2019-09-07 12:03:04,443 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-09-07 12:03:04,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-07 12:03:04,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2019-09-07 12:03:04,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-07 12:03:04,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2019-09-07 12:03:04,456 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 80 [2019-09-07 12:03:04,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:04,456 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2019-09-07 12:03:04,456 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 12:03:04,457 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2019-09-07 12:03:04,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-07 12:03:04,457 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:04,458 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 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] [2019-09-07 12:03:04,458 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:04,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:04,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1091736157, now seen corresponding path program 10 times [2019-09-07 12:03:04,458 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:04,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:04,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:04,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:04,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2019-09-07 12:03:04,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:04,560 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:03:04,580 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:04,635 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:03:04,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:04,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 12:03:04,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 128 proven. 25 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2019-09-07 12:03:04,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:04,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2019-09-07 12:03:04,715 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 12:03:04,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 12:03:04,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-09-07 12:03:04,716 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 16 states. [2019-09-07 12:03:04,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:04,788 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2019-09-07 12:03:04,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 12:03:04,789 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 88 [2019-09-07 12:03:04,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:04,790 INFO L225 Difference]: With dead ends: 103 [2019-09-07 12:03:04,790 INFO L226 Difference]: Without dead ends: 65 [2019-09-07 12:03:04,791 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-09-07 12:03:04,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-07 12:03:04,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2019-09-07 12:03:04,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-07 12:03:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2019-09-07 12:03:04,797 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 88 [2019-09-07 12:03:04,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:04,797 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2019-09-07 12:03:04,797 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 12:03:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2019-09-07 12:03:04,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-07 12:03:04,798 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:04,798 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 8, 8, 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] [2019-09-07 12:03:04,799 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:04,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:04,799 INFO L82 PathProgramCache]: Analyzing trace with hash 959940099, now seen corresponding path program 11 times [2019-09-07 12:03:04,799 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:04,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:04,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:04,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:04,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2019-09-07 12:03:04,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:04,892 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:04,918 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:03:05,281 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-09-07 12:03:05,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:05,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 12:03:05,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (13)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:03:05,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:05,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-09-07 12:03:05,400 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 12:03:05,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 12:03:05,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-09-07 12:03:05,401 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 16 states. [2019-09-07 12:03:05,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:05,491 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2019-09-07 12:03:05,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 12:03:05,492 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 96 [2019-09-07 12:03:05,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:05,493 INFO L225 Difference]: With dead ends: 108 [2019-09-07 12:03:05,494 INFO L226 Difference]: Without dead ends: 69 [2019-09-07 12:03:05,496 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-09-07 12:03:05,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-07 12:03:05,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2019-09-07 12:03:05,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-09-07 12:03:05,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2019-09-07 12:03:05,504 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 96 [2019-09-07 12:03:05,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:05,504 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2019-09-07 12:03:05,505 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 12:03:05,505 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2019-09-07 12:03:05,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-07 12:03:05,506 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:05,506 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 8, 8, 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] [2019-09-07 12:03:05,506 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:05,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:05,507 INFO L82 PathProgramCache]: Analyzing trace with hash 754858879, now seen corresponding path program 12 times [2019-09-07 12:03:05,507 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:05,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:05,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:05,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:05,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-09-07 12:03:05,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:05,624 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:05,634 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:03:05,806 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-09-07 12:03:05,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:05,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 12:03:05,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 232 proven. 49 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-09-07 12:03:05,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:05,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-09-07 12:03:05,941 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 12:03:05,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 12:03:05,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-09-07 12:03:05,941 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 19 states. [2019-09-07 12:03:06,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:06,039 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2019-09-07 12:03:06,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 12:03:06,041 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-09-07 12:03:06,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:06,042 INFO L225 Difference]: With dead ends: 117 [2019-09-07 12:03:06,042 INFO L226 Difference]: Without dead ends: 73 [2019-09-07 12:03:06,043 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-09-07 12:03:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-07 12:03:06,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2019-09-07 12:03:06,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-07 12:03:06,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-09-07 12:03:06,051 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 104 [2019-09-07 12:03:06,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:06,051 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-09-07 12:03:06,051 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 12:03:06,051 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-09-07 12:03:06,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-07 12:03:06,053 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:06,053 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 9, 9, 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] [2019-09-07 12:03:06,053 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:06,054 INFO L82 PathProgramCache]: Analyzing trace with hash 878320095, now seen corresponding path program 13 times [2019-09-07 12:03:06,054 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:06,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:06,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:06,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:06,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2019-09-07 12:03:06,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:06,159 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:06,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:03:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:06,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 12:03:06,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-09-07 12:03:06,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:06,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2019-09-07 12:03:06,456 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 12:03:06,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 12:03:06,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-09-07 12:03:06,457 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 20 states. [2019-09-07 12:03:06,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:06,598 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2019-09-07 12:03:06,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 12:03:06,598 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 112 [2019-09-07 12:03:06,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:06,599 INFO L225 Difference]: With dead ends: 123 [2019-09-07 12:03:06,599 INFO L226 Difference]: Without dead ends: 77 [2019-09-07 12:03:06,600 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-09-07 12:03:06,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-09-07 12:03:06,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2019-09-07 12:03:06,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-07 12:03:06,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2019-09-07 12:03:06,605 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 112 [2019-09-07 12:03:06,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:06,605 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2019-09-07 12:03:06,605 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 12:03:06,605 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2019-09-07 12:03:06,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-09-07 12:03:06,607 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:06,607 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 10, 10, 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] [2019-09-07 12:03:06,607 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:06,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:06,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1308312639, now seen corresponding path program 14 times [2019-09-07 12:03:06,608 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:06,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:06,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:06,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:03:06,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 739 trivial. 0 not checked. [2019-09-07 12:03:06,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:06,789 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:06,800 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:03:06,880 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:03:06,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:06,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 12:03:06,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:07,068 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-09-07 12:03:07,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:07,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2019-09-07 12:03:07,073 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 12:03:07,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 12:03:07,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-09-07 12:03:07,074 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 22 states. [2019-09-07 12:03:07,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:07,175 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-09-07 12:03:07,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 12:03:07,175 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 116 [2019-09-07 12:03:07,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:07,176 INFO L225 Difference]: With dead ends: 129 [2019-09-07 12:03:07,177 INFO L226 Difference]: Without dead ends: 81 [2019-09-07 12:03:07,177 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-09-07 12:03:07,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-07 12:03:07,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2019-09-07 12:03:07,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-07 12:03:07,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-09-07 12:03:07,184 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 116 [2019-09-07 12:03:07,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:07,185 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-09-07 12:03:07,185 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 12:03:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-09-07 12:03:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-09-07 12:03:07,186 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:07,186 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 11, 11, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:03:07,187 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:07,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:07,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1890019937, now seen corresponding path program 15 times [2019-09-07 12:03:07,187 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:07,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:07,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:07,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:07,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2019-09-07 12:03:07,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:07,326 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:07,352 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:03:07,532 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-07 12:03:07,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:07,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 12:03:07,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-09-07 12:03:07,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:07,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2019-09-07 12:03:07,712 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 12:03:07,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 12:03:07,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 12:03:07,713 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 21 states. [2019-09-07 12:03:07,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:07,804 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2019-09-07 12:03:07,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 12:03:07,805 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 120 [2019-09-07 12:03:07,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:07,806 INFO L225 Difference]: With dead ends: 134 [2019-09-07 12:03:07,806 INFO L226 Difference]: Without dead ends: 85 [2019-09-07 12:03:07,807 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 12:03:07,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-07 12:03:07,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-09-07 12:03:07,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-07 12:03:07,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-09-07 12:03:07,811 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 120 [2019-09-07 12:03:07,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:07,812 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-09-07 12:03:07,812 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 12:03:07,812 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-09-07 12:03:07,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-07 12:03:07,813 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:07,813 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 11, 11, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:03:07,813 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:07,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:07,814 INFO L82 PathProgramCache]: Analyzing trace with hash -703058917, now seen corresponding path program 16 times [2019-09-07 12:03:07,814 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:07,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:07,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:07,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:07,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2019-09-07 12:03:08,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:08,091 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:08,128 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:03:08,216 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:03:08,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:08,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 12:03:08,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2019-09-07 12:03:08,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:08,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 12:03:08,265 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 12:03:08,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 12:03:08,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 12:03:08,266 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 15 states. [2019-09-07 12:03:08,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:08,317 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2019-09-07 12:03:08,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 12:03:08,318 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 128 [2019-09-07 12:03:08,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:08,319 INFO L225 Difference]: With dead ends: 140 [2019-09-07 12:03:08,319 INFO L226 Difference]: Without dead ends: 86 [2019-09-07 12:03:08,320 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 12:03:08,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-07 12:03:08,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-09-07 12:03:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-09-07 12:03:08,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2019-09-07 12:03:08,326 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 128 [2019-09-07 12:03:08,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:08,327 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2019-09-07 12:03:08,327 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 12:03:08,327 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2019-09-07 12:03:08,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-09-07 12:03:08,328 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:08,328 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 12, 12, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:03:08,329 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:08,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:08,329 INFO L82 PathProgramCache]: Analyzing trace with hash 965488765, now seen corresponding path program 17 times [2019-09-07 12:03:08,329 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:08,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:08,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:08,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:08,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2019-09-07 12:03:08,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:08,493 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:08,525 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:03:10,683 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-09-07 12:03:10,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:10,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 12:03:10,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 364 proven. 81 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2019-09-07 12:03:10,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:10,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2019-09-07 12:03:10,891 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 12:03:10,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 12:03:10,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 12:03:10,892 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 23 states. [2019-09-07 12:03:10,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:10,991 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2019-09-07 12:03:10,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 12:03:10,991 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 130 [2019-09-07 12:03:10,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:10,992 INFO L225 Difference]: With dead ends: 144 [2019-09-07 12:03:10,992 INFO L226 Difference]: Without dead ends: 91 [2019-09-07 12:03:10,993 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 12:03:10,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-07 12:03:10,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2019-09-07 12:03:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-07 12:03:10,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-09-07 12:03:10,998 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 130 [2019-09-07 12:03:10,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:10,998 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-09-07 12:03:10,998 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 12:03:10,998 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-09-07 12:03:10,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-09-07 12:03:11,000 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:11,000 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 12, 12, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:03:11,000 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:11,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:11,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1776408569, now seen corresponding path program 18 times [2019-09-07 12:03:11,001 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:11,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:11,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:11,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:11,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1096 trivial. 0 not checked. [2019-09-07 12:03:11,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:11,221 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:03:11,247 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:11,614 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-09-07 12:03:11,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:11,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 12:03:11,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 448 proven. 100 refuted. 0 times theorem prover too weak. 692 trivial. 0 not checked. [2019-09-07 12:03:11,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:11,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2019-09-07 12:03:11,819 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 12:03:11,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 12:03:11,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2019-09-07 12:03:11,820 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 26 states. [2019-09-07 12:03:11,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:11,947 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2019-09-07 12:03:11,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 12:03:11,948 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 138 [2019-09-07 12:03:11,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:11,949 INFO L225 Difference]: With dead ends: 153 [2019-09-07 12:03:11,949 INFO L226 Difference]: Without dead ends: 95 [2019-09-07 12:03:11,950 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2019-09-07 12:03:11,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-09-07 12:03:11,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2019-09-07 12:03:11,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-07 12:03:11,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2019-09-07 12:03:11,954 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 138 [2019-09-07 12:03:11,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:11,954 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2019-09-07 12:03:11,955 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 12:03:11,955 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2019-09-07 12:03:11,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-09-07 12:03:11,956 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:11,956 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 13, 13, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:03:11,956 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:11,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:11,956 INFO L82 PathProgramCache]: Analyzing trace with hash -159648167, now seen corresponding path program 19 times [2019-09-07 12:03:11,957 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:11,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:11,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:11,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:11,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2019-09-07 12:03:12,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:12,131 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:12,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:03:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:12,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 12:03:12,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1291 trivial. 0 not checked. [2019-09-07 12:03:12,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:12,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2019-09-07 12:03:12,522 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 12:03:12,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 12:03:12,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 12:03:12,523 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 28 states. [2019-09-07 12:03:12,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:12,659 INFO L93 Difference]: Finished difference Result 159 states and 168 transitions. [2019-09-07 12:03:12,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 12:03:12,660 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 146 [2019-09-07 12:03:12,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:12,661 INFO L225 Difference]: With dead ends: 159 [2019-09-07 12:03:12,661 INFO L226 Difference]: Without dead ends: 99 [2019-09-07 12:03:12,662 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 12:03:12,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-07 12:03:12,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2019-09-07 12:03:12,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-09-07 12:03:12,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-09-07 12:03:12,667 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 146 [2019-09-07 12:03:12,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:12,668 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-09-07 12:03:12,668 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 12:03:12,668 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-09-07 12:03:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-09-07 12:03:12,669 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:12,669 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 14, 14, 12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:03:12,669 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:12,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:12,670 INFO L82 PathProgramCache]: Analyzing trace with hash 920273337, now seen corresponding path program 20 times [2019-09-07 12:03:12,670 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:12,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:12,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:12,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:03:12,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2019-09-07 12:03:12,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:12,859 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:12,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:03:12,951 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:03:12,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:12,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 12:03:12,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1314 trivial. 0 not checked. [2019-09-07 12:03:13,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:13,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2019-09-07 12:03:13,229 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 12:03:13,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 12:03:13,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2019-09-07 12:03:13,230 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 30 states. [2019-09-07 12:03:13,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:13,379 INFO L93 Difference]: Finished difference Result 165 states and 174 transitions. [2019-09-07 12:03:13,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-07 12:03:13,380 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 150 [2019-09-07 12:03:13,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:13,381 INFO L225 Difference]: With dead ends: 165 [2019-09-07 12:03:13,381 INFO L226 Difference]: Without dead ends: 103 [2019-09-07 12:03:13,382 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2019-09-07 12:03:13,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-07 12:03:13,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-09-07 12:03:13,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-07 12:03:13,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-09-07 12:03:13,387 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 150 [2019-09-07 12:03:13,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:13,387 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-09-07 12:03:13,387 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 12:03:13,387 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-09-07 12:03:13,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-09-07 12:03:13,388 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:13,388 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 15, 15, 13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:03:13,389 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:13,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:13,389 INFO L82 PathProgramCache]: Analyzing trace with hash 606123033, now seen corresponding path program 21 times [2019-09-07 12:03:13,389 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:13,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:13,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:13,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:13,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2019-09-07 12:03:13,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:13,685 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:03:13,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:14,232 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 12:03:14,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:14,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 12:03:14,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 536 proven. 121 refuted. 0 times theorem prover too weak. 907 trivial. 0 not checked. [2019-09-07 12:03:14,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:14,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2019-09-07 12:03:14,490 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 12:03:14,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 12:03:14,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 12:03:14,491 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 28 states. [2019-09-07 12:03:14,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:14,615 INFO L93 Difference]: Finished difference Result 170 states and 181 transitions. [2019-09-07 12:03:14,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 12:03:14,616 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2019-09-07 12:03:14,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:14,617 INFO L225 Difference]: With dead ends: 170 [2019-09-07 12:03:14,617 INFO L226 Difference]: Without dead ends: 107 [2019-09-07 12:03:14,618 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 12:03:14,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-09-07 12:03:14,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-09-07 12:03:14,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-09-07 12:03:14,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-09-07 12:03:14,623 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 154 [2019-09-07 12:03:14,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:14,623 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-09-07 12:03:14,623 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 12:03:14,623 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-09-07 12:03:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-09-07 12:03:14,624 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:14,625 INFO L399 BasicCegarLoop]: trace histogram [36, 36, 15, 15, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:03:14,625 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:14,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:14,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1060846741, now seen corresponding path program 22 times [2019-09-07 12:03:14,625 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:14,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:14,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:14,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:14,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1804 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1579 trivial. 0 not checked. [2019-09-07 12:03:14,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:14,857 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:14,869 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:03:14,961 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:03:14,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:14,964 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 12:03:14,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1804 backedges. 632 proven. 144 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2019-09-07 12:03:15,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:15,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2019-09-07 12:03:15,206 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 12:03:15,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 12:03:15,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2019-09-07 12:03:15,208 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 31 states. [2019-09-07 12:03:15,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:15,329 INFO L93 Difference]: Finished difference Result 179 states and 191 transitions. [2019-09-07 12:03:15,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 12:03:15,329 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 162 [2019-09-07 12:03:15,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:15,331 INFO L225 Difference]: With dead ends: 179 [2019-09-07 12:03:15,331 INFO L226 Difference]: Without dead ends: 111 [2019-09-07 12:03:15,332 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2019-09-07 12:03:15,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-09-07 12:03:15,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2019-09-07 12:03:15,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-09-07 12:03:15,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-09-07 12:03:15,338 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 162 [2019-09-07 12:03:15,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:15,338 INFO L475 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-09-07 12:03:15,338 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 12:03:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-09-07 12:03:15,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-09-07 12:03:15,342 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:15,342 INFO L399 BasicCegarLoop]: trace histogram [39, 39, 16, 16, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:03:15,342 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:15,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:15,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1948693259, now seen corresponding path program 23 times [2019-09-07 12:03:15,343 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:15,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:15,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:15,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:15,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2066 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2019-09-07 12:03:15,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:15,599 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:03:15,615 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:25,641 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-09-07 12:03:25,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:25,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 12:03:25,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2066 backedges. 732 proven. 169 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2019-09-07 12:03:25,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:25,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2019-09-07 12:03:25,933 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 12:03:25,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 12:03:25,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 12:03:25,934 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 31 states. [2019-09-07 12:03:26,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:26,052 INFO L93 Difference]: Finished difference Result 184 states and 195 transitions. [2019-09-07 12:03:26,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 12:03:26,053 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 170 [2019-09-07 12:03:26,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:26,054 INFO L225 Difference]: With dead ends: 184 [2019-09-07 12:03:26,054 INFO L226 Difference]: Without dead ends: 115 [2019-09-07 12:03:26,055 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 12:03:26,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-09-07 12:03:26,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-09-07 12:03:26,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-09-07 12:03:26,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-09-07 12:03:26,060 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 170 [2019-09-07 12:03:26,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:26,060 INFO L475 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-09-07 12:03:26,060 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 12:03:26,060 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-09-07 12:03:26,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-09-07 12:03:26,061 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:26,062 INFO L399 BasicCegarLoop]: trace histogram [42, 42, 16, 16, 15, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:03:26,062 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:26,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:26,062 INFO L82 PathProgramCache]: Analyzing trace with hash -3950479, now seen corresponding path program 24 times [2019-09-07 12:03:26,062 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:26,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:26,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:26,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:26,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2344 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2019-09-07 12:03:26,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:26,329 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:26,340 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:03:27,351 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2019-09-07 12:03:27,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:27,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 12:03:27,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:27,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2344 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (26)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:03:27,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:27,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2019-09-07 12:03:27,827 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-07 12:03:27,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-07 12:03:27,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 12:03:27,828 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 34 states. [2019-09-07 12:03:27,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:27,964 INFO L93 Difference]: Finished difference Result 193 states and 205 transitions. [2019-09-07 12:03:27,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-07 12:03:27,964 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 178 [2019-09-07 12:03:27,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:27,965 INFO L225 Difference]: With dead ends: 193 [2019-09-07 12:03:27,966 INFO L226 Difference]: Without dead ends: 119 [2019-09-07 12:03:27,966 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 12:03:27,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-09-07 12:03:27,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2019-09-07 12:03:27,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-09-07 12:03:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2019-09-07 12:03:27,972 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 178 [2019-09-07 12:03:27,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:27,973 INFO L475 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2019-09-07 12:03:27,973 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-07 12:03:27,973 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2019-09-07 12:03:27,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-09-07 12:03:27,976 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:27,976 INFO L399 BasicCegarLoop]: trace histogram [45, 45, 17, 17, 15, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:03:27,976 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:27,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:27,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1877930287, now seen corresponding path program 25 times [2019-09-07 12:03:27,977 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:27,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:27,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:27,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:27,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2644 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2419 trivial. 0 not checked. [2019-09-07 12:03:28,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:28,306 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:03:28,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:28,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 12:03:28,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2644 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2355 trivial. 0 not checked. [2019-09-07 12:03:28,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:28,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 36 [2019-09-07 12:03:28,817 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-07 12:03:28,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-07 12:03:28,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 12:03:28,818 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 36 states. [2019-09-07 12:03:28,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:28,960 INFO L93 Difference]: Finished difference Result 199 states and 208 transitions. [2019-09-07 12:03:28,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 12:03:28,960 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 186 [2019-09-07 12:03:28,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:28,961 INFO L225 Difference]: With dead ends: 199 [2019-09-07 12:03:28,962 INFO L226 Difference]: Without dead ends: 123 [2019-09-07 12:03:28,963 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 12:03:28,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-09-07 12:03:28,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2019-09-07 12:03:28,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-09-07 12:03:28,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2019-09-07 12:03:28,972 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 186 [2019-09-07 12:03:28,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:28,972 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2019-09-07 12:03:28,972 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-07 12:03:28,972 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2019-09-07 12:03:28,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-09-07 12:03:28,973 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:28,974 INFO L399 BasicCegarLoop]: trace histogram [45, 45, 18, 18, 16, 16, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:03:28,974 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:28,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:28,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1503416881, now seen corresponding path program 26 times [2019-09-07 12:03:28,974 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:28,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:28,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:28,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:03:28,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2454 trivial. 0 not checked. [2019-09-07 12:03:29,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:29,244 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:29,255 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:03:29,356 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:03:29,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:29,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 12:03:29,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2386 trivial. 0 not checked. [2019-09-07 12:03:29,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:29,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2019-09-07 12:03:29,786 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-07 12:03:29,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-07 12:03:29,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 12:03:29,787 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand 38 states. [2019-09-07 12:03:29,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:29,963 INFO L93 Difference]: Finished difference Result 205 states and 214 transitions. [2019-09-07 12:03:29,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-07 12:03:29,964 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 190 [2019-09-07 12:03:29,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:29,965 INFO L225 Difference]: With dead ends: 205 [2019-09-07 12:03:29,965 INFO L226 Difference]: Without dead ends: 127 [2019-09-07 12:03:29,968 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 12:03:29,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-09-07 12:03:29,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2019-09-07 12:03:29,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-09-07 12:03:29,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2019-09-07 12:03:29,975 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 190 [2019-09-07 12:03:29,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:29,975 INFO L475 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2019-09-07 12:03:29,975 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-07 12:03:29,975 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2019-09-07 12:03:29,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-09-07 12:03:29,977 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:29,977 INFO L399 BasicCegarLoop]: trace histogram [45, 45, 19, 19, 17, 17, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:03:29,978 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:29,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:29,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1660502895, now seen corresponding path program 27 times [2019-09-07 12:03:29,979 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:29,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:29,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:29,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:29,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2780 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2491 trivial. 0 not checked. [2019-09-07 12:03:30,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:30,293 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:30,303 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:03:31,406 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-07 12:03:31,406 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:31,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 12:03:31,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2780 backedges. 968 proven. 225 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2019-09-07 12:03:31,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:31,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2019-09-07 12:03:31,789 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-07 12:03:31,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-07 12:03:31,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 12:03:31,790 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand 36 states. [2019-09-07 12:03:31,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:31,985 INFO L93 Difference]: Finished difference Result 210 states and 221 transitions. [2019-09-07 12:03:31,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 12:03:31,987 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 194 [2019-09-07 12:03:31,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:31,989 INFO L225 Difference]: With dead ends: 210 [2019-09-07 12:03:31,989 INFO L226 Difference]: Without dead ends: 131 [2019-09-07 12:03:31,990 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 12:03:31,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-09-07 12:03:31,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2019-09-07 12:03:31,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-09-07 12:03:31,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2019-09-07 12:03:31,997 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 194 [2019-09-07 12:03:31,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:31,998 INFO L475 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2019-09-07 12:03:31,998 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-07 12:03:31,998 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2019-09-07 12:03:31,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-09-07 12:03:31,999 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:31,999 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 19, 19, 18, 18, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:03:32,000 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:32,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:32,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1088878323, now seen corresponding path program 28 times [2019-09-07 12:03:32,001 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:32,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:32,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:32,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:32,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3100 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2739 trivial. 0 not checked. [2019-09-07 12:03:32,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:32,349 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:03:32,369 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:32,472 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:03:32,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:32,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 12:03:32,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3100 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2739 trivial. 0 not checked. [2019-09-07 12:03:32,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:32,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-07 12:03:32,535 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 12:03:32,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 12:03:32,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 12:03:32,536 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand 23 states. [2019-09-07 12:03:32,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:32,612 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2019-09-07 12:03:32,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 12:03:32,612 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 202 [2019-09-07 12:03:32,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:32,614 INFO L225 Difference]: With dead ends: 216 [2019-09-07 12:03:32,614 INFO L226 Difference]: Without dead ends: 132 [2019-09-07 12:03:32,617 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 12:03:32,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-09-07 12:03:32,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2019-09-07 12:03:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-09-07 12:03:32,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2019-09-07 12:03:32,629 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 202 [2019-09-07 12:03:32,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:32,630 INFO L475 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2019-09-07 12:03:32,630 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 12:03:32,630 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2019-09-07 12:03:32,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-09-07 12:03:32,631 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:32,632 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 20, 20, 18, 18, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:03:32,632 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:32,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:32,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1122265839, now seen corresponding path program 29 times [2019-09-07 12:03:32,633 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:32,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:32,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:32,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:32,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3139 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2815 trivial. 0 not checked. [2019-09-07 12:03:33,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:33,034 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:33,067 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:04:15,562 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2019-09-07 12:04:15,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:15,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 12:04:15,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3139 backedges. 1092 proven. 256 refuted. 0 times theorem prover too weak. 1791 trivial. 0 not checked. [2019-09-07 12:04:15,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:15,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2019-09-07 12:04:15,977 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-07 12:04:15,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-07 12:04:15,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 12:04:15,978 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand 38 states. [2019-09-07 12:04:16,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:16,173 INFO L93 Difference]: Finished difference Result 220 states and 231 transitions. [2019-09-07 12:04:16,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-07 12:04:16,173 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 204 [2019-09-07 12:04:16,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:16,175 INFO L225 Difference]: With dead ends: 220 [2019-09-07 12:04:16,175 INFO L226 Difference]: Without dead ends: 137 [2019-09-07 12:04:16,176 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 12:04:16,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-09-07 12:04:16,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2019-09-07 12:04:16,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-09-07 12:04:16,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2019-09-07 12:04:16,185 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 204 [2019-09-07 12:04:16,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:16,185 INFO L475 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2019-09-07 12:04:16,185 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-07 12:04:16,186 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2019-09-07 12:04:16,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-09-07 12:04:16,187 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:16,187 INFO L399 BasicCegarLoop]: trace histogram [51, 51, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:16,187 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:16,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:16,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1066125419, now seen corresponding path program 30 times [2019-09-07 12:04:16,188 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:16,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:16,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:16,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:16,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3479 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 3079 trivial. 0 not checked. [2019-09-07 12:04:16,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:16,520 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:04:16,531 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:04:18,262 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2019-09-07 12:04:18,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:18,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 12:04:18,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3479 backedges. 1232 proven. 289 refuted. 0 times theorem prover too weak. 1958 trivial. 0 not checked. [2019-09-07 12:04:19,059 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:19,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2019-09-07 12:04:19,061 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-07 12:04:19,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-07 12:04:19,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1198, Unknown=0, NotChecked=0, Total=1640 [2019-09-07 12:04:19,063 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand 41 states. [2019-09-07 12:04:19,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:19,262 INFO L93 Difference]: Finished difference Result 229 states and 241 transitions. [2019-09-07 12:04:19,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-09-07 12:04:19,264 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 212 [2019-09-07 12:04:19,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:19,265 INFO L225 Difference]: With dead ends: 229 [2019-09-07 12:04:19,265 INFO L226 Difference]: Without dead ends: 141 [2019-09-07 12:04:19,266 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=442, Invalid=1198, Unknown=0, NotChecked=0, Total=1640 [2019-09-07 12:04:19,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-09-07 12:04:19,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2019-09-07 12:04:19,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-09-07 12:04:19,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 143 transitions. [2019-09-07 12:04:19,273 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 143 transitions. Word has length 212 [2019-09-07 12:04:19,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:19,274 INFO L475 AbstractCegarLoop]: Abstraction has 139 states and 143 transitions. [2019-09-07 12:04:19,274 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-07 12:04:19,274 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 143 transitions. [2019-09-07 12:04:19,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-09-07 12:04:19,278 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:19,278 INFO L399 BasicCegarLoop]: trace histogram [54, 54, 21, 21, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:19,278 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:19,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:19,279 INFO L82 PathProgramCache]: Analyzing trace with hash 2057887435, now seen corresponding path program 31 times [2019-09-07 12:04:19,279 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:19,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:19,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:19,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:19,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3841 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 3480 trivial. 0 not checked. [2019-09-07 12:04:19,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:19,629 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:04:19,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:04:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:19,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 12:04:19,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:20,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3841 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 3400 trivial. 0 not checked. [2019-09-07 12:04:20,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:20,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2019-09-07 12:04:20,289 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-07 12:04:20,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-07 12:04:20,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=1386, Unknown=0, NotChecked=0, Total=1892 [2019-09-07 12:04:20,291 INFO L87 Difference]: Start difference. First operand 139 states and 143 transitions. Second operand 44 states. [2019-09-07 12:04:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:20,496 INFO L93 Difference]: Finished difference Result 235 states and 244 transitions. [2019-09-07 12:04:20,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-07 12:04:20,497 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 220 [2019-09-07 12:04:20,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:20,499 INFO L225 Difference]: With dead ends: 235 [2019-09-07 12:04:20,499 INFO L226 Difference]: Without dead ends: 145 [2019-09-07 12:04:20,501 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=506, Invalid=1386, Unknown=0, NotChecked=0, Total=1892 [2019-09-07 12:04:20,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-09-07 12:04:20,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2019-09-07 12:04:20,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-09-07 12:04:20,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2019-09-07 12:04:20,506 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 220 [2019-09-07 12:04:20,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:20,506 INFO L475 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2019-09-07 12:04:20,506 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-07 12:04:20,506 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2019-09-07 12:04:20,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-09-07 12:04:20,508 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:20,508 INFO L399 BasicCegarLoop]: trace histogram [54, 54, 22, 22, 20, 20, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:20,508 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:20,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:20,509 INFO L82 PathProgramCache]: Analyzing trace with hash -218692821, now seen corresponding path program 32 times [2019-09-07 12:04:20,509 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:20,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:20,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:20,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:04:20,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 3523 trivial. 0 not checked. [2019-09-07 12:04:20,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:20,871 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:04:20,881 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:04:21,000 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:04:21,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:21,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 12:04:21,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3439 trivial. 0 not checked. [2019-09-07 12:04:21,567 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:21,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 46 [2019-09-07 12:04:21,568 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-09-07 12:04:21,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-09-07 12:04:21,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=1518, Unknown=0, NotChecked=0, Total=2070 [2019-09-07 12:04:21,569 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand 46 states. [2019-09-07 12:04:21,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:21,764 INFO L93 Difference]: Finished difference Result 241 states and 250 transitions. [2019-09-07 12:04:21,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-07 12:04:21,765 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 224 [2019-09-07 12:04:21,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:21,766 INFO L225 Difference]: With dead ends: 241 [2019-09-07 12:04:21,767 INFO L226 Difference]: Without dead ends: 149 [2019-09-07 12:04:21,768 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=552, Invalid=1518, Unknown=0, NotChecked=0, Total=2070 [2019-09-07 12:04:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-09-07 12:04:21,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2019-09-07 12:04:21,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-09-07 12:04:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2019-09-07 12:04:21,774 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 224 [2019-09-07 12:04:21,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:21,774 INFO L475 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2019-09-07 12:04:21,774 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-09-07 12:04:21,774 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2019-09-07 12:04:21,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-09-07 12:04:21,776 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:21,776 INFO L399 BasicCegarLoop]: trace histogram [54, 54, 23, 23, 21, 21, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:21,776 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:21,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:21,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1586515595, now seen corresponding path program 33 times [2019-09-07 12:04:21,777 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:21,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:21,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:21,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:21,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4009 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 3568 trivial. 0 not checked. [2019-09-07 12:04:22,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:22,241 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:04:22,269 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:04:25,080 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-09-07 12:04:25,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:25,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 12:04:25,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4009 backedges. 1376 proven. 324 refuted. 0 times theorem prover too weak. 2309 trivial. 0 not checked. [2019-09-07 12:04:25,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:25,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 43 [2019-09-07 12:04:25,596 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-07 12:04:25,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-07 12:04:25,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1321, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 12:04:25,596 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand 43 states. [2019-09-07 12:04:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:25,801 INFO L93 Difference]: Finished difference Result 246 states and 257 transitions. [2019-09-07 12:04:25,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-07 12:04:25,801 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 228 [2019-09-07 12:04:25,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:25,803 INFO L225 Difference]: With dead ends: 246 [2019-09-07 12:04:25,803 INFO L226 Difference]: Without dead ends: 153 [2019-09-07 12:04:25,804 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=485, Invalid=1321, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 12:04:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-09-07 12:04:25,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2019-09-07 12:04:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-09-07 12:04:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 155 transitions. [2019-09-07 12:04:25,810 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 155 transitions. Word has length 228 [2019-09-07 12:04:25,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:25,810 INFO L475 AbstractCegarLoop]: Abstraction has 151 states and 155 transitions. [2019-09-07 12:04:25,810 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-07 12:04:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 155 transitions. [2019-09-07 12:04:25,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2019-09-07 12:04:25,812 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:25,812 INFO L399 BasicCegarLoop]: trace histogram [57, 57, 23, 23, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:25,813 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:25,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:25,813 INFO L82 PathProgramCache]: Analyzing trace with hash 483101959, now seen corresponding path program 34 times [2019-09-07 12:04:25,813 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:25,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:25,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:25,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:25,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4391 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3862 trivial. 0 not checked. [2019-09-07 12:04:26,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:26,234 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:04:26,253 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:04:26,380 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:04:26,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:26,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 12:04:26,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4391 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3862 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (36)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:04:26,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:26,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-09-07 12:04:26,429 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 12:04:26,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 12:04:26,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 12:04:26,430 INFO L87 Difference]: Start difference. First operand 151 states and 155 transitions. Second operand 27 states. [2019-09-07 12:04:26,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:26,525 INFO L93 Difference]: Finished difference Result 252 states and 260 transitions. [2019-09-07 12:04:26,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 12:04:26,526 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 236 [2019-09-07 12:04:26,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:26,527 INFO L225 Difference]: With dead ends: 252 [2019-09-07 12:04:26,527 INFO L226 Difference]: Without dead ends: 154 [2019-09-07 12:04:26,528 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 12:04:26,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-09-07 12:04:26,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2019-09-07 12:04:26,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-09-07 12:04:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2019-09-07 12:04:26,534 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 236 [2019-09-07 12:04:26,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:26,534 INFO L475 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2019-09-07 12:04:26,534 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 12:04:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2019-09-07 12:04:26,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-09-07 12:04:26,536 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:26,536 INFO L399 BasicCegarLoop]: trace histogram [57, 57, 24, 24, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:26,537 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:26,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:26,537 INFO L82 PathProgramCache]: Analyzing trace with hash -640158103, now seen corresponding path program 35 times [2019-09-07 12:04:26,537 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:26,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:26,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:26,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:26,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4438 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3954 trivial. 0 not checked. [2019-09-07 12:04:26,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:26,995 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:04:27,005 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:06:03,602 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2019-09-07 12:06:03,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:03,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 12:06:03,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4438 backedges. 1524 proven. 361 refuted. 0 times theorem prover too weak. 2553 trivial. 0 not checked. [2019-09-07 12:06:04,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:04,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 45 [2019-09-07 12:06:04,211 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-07 12:06:04,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-07 12:06:04,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1450, Unknown=0, NotChecked=0, Total=1980 [2019-09-07 12:06:04,212 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand 45 states. [2019-09-07 12:06:04,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:04,403 INFO L93 Difference]: Finished difference Result 256 states and 267 transitions. [2019-09-07 12:06:04,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-09-07 12:06:04,404 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 238 [2019-09-07 12:06:04,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:04,405 INFO L225 Difference]: With dead ends: 256 [2019-09-07 12:06:04,406 INFO L226 Difference]: Without dead ends: 159 [2019-09-07 12:06:04,407 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=1450, Unknown=0, NotChecked=0, Total=1980 [2019-09-07 12:06:04,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-09-07 12:06:04,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2019-09-07 12:06:04,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-09-07 12:06:04,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2019-09-07 12:06:04,414 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 238 [2019-09-07 12:06:04,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:04,414 INFO L475 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2019-09-07 12:06:04,415 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-07 12:06:04,415 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2019-09-07 12:06:04,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-09-07 12:06:04,416 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:04,416 INFO L399 BasicCegarLoop]: trace histogram [60, 60, 24, 24, 23, 23, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:04,417 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:04,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:04,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1199719909, now seen corresponding path program 36 times [2019-09-07 12:06:04,417 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:04,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:04,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:04,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:04,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4840 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4264 trivial. 0 not checked. [2019-09-07 12:06:04,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:04,901 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:04,911 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:06:12,481 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2019-09-07 12:06:12,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:12,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 12:06:12,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:13,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4840 backedges. 1688 proven. 400 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2019-09-07 12:06:13,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:13,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23] total 48 [2019-09-07 12:06:13,022 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-09-07 12:06:13,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-09-07 12:06:13,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=1653, Unknown=0, NotChecked=0, Total=2256 [2019-09-07 12:06:13,023 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand 48 states. [2019-09-07 12:06:13,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:13,237 INFO L93 Difference]: Finished difference Result 265 states and 277 transitions. [2019-09-07 12:06:13,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-09-07 12:06:13,242 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 246 [2019-09-07 12:06:13,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:13,243 INFO L225 Difference]: With dead ends: 265 [2019-09-07 12:06:13,243 INFO L226 Difference]: Without dead ends: 163 [2019-09-07 12:06:13,244 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=603, Invalid=1653, Unknown=0, NotChecked=0, Total=2256 [2019-09-07 12:06:13,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-09-07 12:06:13,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2019-09-07 12:06:13,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-09-07 12:06:13,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2019-09-07 12:06:13,250 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 246 [2019-09-07 12:06:13,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:13,250 INFO L475 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2019-09-07 12:06:13,250 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-09-07 12:06:13,250 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2019-09-07 12:06:13,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2019-09-07 12:06:13,252 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:13,252 INFO L399 BasicCegarLoop]: trace histogram [63, 63, 25, 25, 23, 23, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:13,252 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:13,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:13,253 INFO L82 PathProgramCache]: Analyzing trace with hash 963943493, now seen corresponding path program 37 times [2019-09-07 12:06:13,253 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:13,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:13,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:13,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:13,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5264 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 4735 trivial. 0 not checked. [2019-09-07 12:06:13,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:13,766 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:06:13,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:13,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 12:06:13,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5264 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 4639 trivial. 0 not checked. [2019-09-07 12:06:14,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:14,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 52 [2019-09-07 12:06:14,710 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-09-07 12:06:14,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-09-07 12:06:14,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=1950, Unknown=0, NotChecked=0, Total=2652 [2019-09-07 12:06:14,711 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand 52 states. [2019-09-07 12:06:14,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:14,982 INFO L93 Difference]: Finished difference Result 271 states and 280 transitions. [2019-09-07 12:06:14,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-09-07 12:06:14,982 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 254 [2019-09-07 12:06:14,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:14,984 INFO L225 Difference]: With dead ends: 271 [2019-09-07 12:06:14,984 INFO L226 Difference]: Without dead ends: 167 [2019-09-07 12:06:14,985 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=702, Invalid=1950, Unknown=0, NotChecked=0, Total=2652 [2019-09-07 12:06:14,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-09-07 12:06:14,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2019-09-07 12:06:14,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-09-07 12:06:14,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2019-09-07 12:06:14,992 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 254 [2019-09-07 12:06:14,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:14,992 INFO L475 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2019-09-07 12:06:14,992 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-09-07 12:06:14,992 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2019-09-07 12:06:14,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-09-07 12:06:14,994 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:14,994 INFO L399 BasicCegarLoop]: trace histogram [63, 63, 26, 26, 24, 24, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:14,994 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:14,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:14,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1383752101, now seen corresponding path program 38 times [2019-09-07 12:06:14,995 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:14,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:14,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:14,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:06:14,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5362 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4786 trivial. 0 not checked. [2019-09-07 12:06:15,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:15,474 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:15,487 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:06:15,625 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:06:15,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:15,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 12:06:15,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5362 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 4686 trivial. 0 not checked. [2019-09-07 12:06:16,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:16,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29] total 54 [2019-09-07 12:06:16,411 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-09-07 12:06:16,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-09-07 12:06:16,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=2106, Unknown=0, NotChecked=0, Total=2862 [2019-09-07 12:06:16,413 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand 54 states. [2019-09-07 12:06:16,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:16,679 INFO L93 Difference]: Finished difference Result 277 states and 286 transitions. [2019-09-07 12:06:16,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-09-07 12:06:16,680 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 258 [2019-09-07 12:06:16,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:16,681 INFO L225 Difference]: With dead ends: 277 [2019-09-07 12:06:16,681 INFO L226 Difference]: Without dead ends: 171 [2019-09-07 12:06:16,684 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=756, Invalid=2106, Unknown=0, NotChecked=0, Total=2862 [2019-09-07 12:06:16,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-09-07 12:06:16,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2019-09-07 12:06:16,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-09-07 12:06:16,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 173 transitions. [2019-09-07 12:06:16,692 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 173 transitions. Word has length 258 [2019-09-07 12:06:16,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:16,692 INFO L475 AbstractCegarLoop]: Abstraction has 169 states and 173 transitions. [2019-09-07 12:06:16,692 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-09-07 12:06:16,692 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 173 transitions. [2019-09-07 12:06:16,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-09-07 12:06:16,694 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:16,694 INFO L399 BasicCegarLoop]: trace histogram [63, 63, 27, 27, 25, 25, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:16,694 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:16,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:16,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1242083835, now seen corresponding path program 39 times [2019-09-07 12:06:16,695 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:16,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:16,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:16,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:16,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5464 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 4839 trivial. 0 not checked. [2019-09-07 12:06:17,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:17,246 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:17,257 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:06:24,627 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-07 12:06:24,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:24,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 12:06:24,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5464 backedges. 1856 proven. 441 refuted. 0 times theorem prover too weak. 3167 trivial. 0 not checked. [2019-09-07 12:06:25,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:25,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 50 [2019-09-07 12:06:25,200 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-09-07 12:06:25,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-09-07 12:06:25,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=1797, Unknown=0, NotChecked=0, Total=2450 [2019-09-07 12:06:25,201 INFO L87 Difference]: Start difference. First operand 169 states and 173 transitions. Second operand 50 states. [2019-09-07 12:06:25,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:25,435 INFO L93 Difference]: Finished difference Result 282 states and 293 transitions. [2019-09-07 12:06:25,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-09-07 12:06:25,436 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 262 [2019-09-07 12:06:25,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:25,437 INFO L225 Difference]: With dead ends: 282 [2019-09-07 12:06:25,437 INFO L226 Difference]: Without dead ends: 175 [2019-09-07 12:06:25,438 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=653, Invalid=1797, Unknown=0, NotChecked=0, Total=2450 [2019-09-07 12:06:25,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-09-07 12:06:25,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2019-09-07 12:06:25,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-09-07 12:06:25,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 177 transitions. [2019-09-07 12:06:25,446 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 177 transitions. Word has length 262 [2019-09-07 12:06:25,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:25,446 INFO L475 AbstractCegarLoop]: Abstraction has 173 states and 177 transitions. [2019-09-07 12:06:25,446 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-09-07 12:06:25,446 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 177 transitions. [2019-09-07 12:06:25,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-09-07 12:06:25,448 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:25,448 INFO L399 BasicCegarLoop]: trace histogram [66, 66, 27, 27, 26, 26, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:25,448 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:25,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:25,449 INFO L82 PathProgramCache]: Analyzing trace with hash 952204929, now seen corresponding path program 40 times [2019-09-07 12:06:25,449 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:25,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:25,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:25,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:25,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:25,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5179 trivial. 0 not checked. [2019-09-07 12:06:26,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:26,043 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:06:26,060 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:26,204 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:06:26,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:26,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 12:06:26,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 2032 proven. 484 refuted. 0 times theorem prover too weak. 3392 trivial. 0 not checked. [2019-09-07 12:06:26,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:26,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25] total 53 [2019-09-07 12:06:26,839 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-07 12:06:26,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-07 12:06:26,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 12:06:26,840 INFO L87 Difference]: Start difference. First operand 173 states and 177 transitions. Second operand 53 states. [2019-09-07 12:06:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:27,099 INFO L93 Difference]: Finished difference Result 291 states and 303 transitions. [2019-09-07 12:06:27,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-09-07 12:06:27,100 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 270 [2019-09-07 12:06:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:27,101 INFO L225 Difference]: With dead ends: 291 [2019-09-07 12:06:27,101 INFO L226 Difference]: Without dead ends: 179 [2019-09-07 12:06:27,102 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 12:06:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-09-07 12:06:27,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2019-09-07 12:06:27,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-09-07 12:06:27,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2019-09-07 12:06:27,108 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 270 [2019-09-07 12:06:27,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:27,108 INFO L475 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2019-09-07 12:06:27,109 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-07 12:06:27,109 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2019-09-07 12:06:27,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2019-09-07 12:06:27,110 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:27,111 INFO L399 BasicCegarLoop]: trace histogram [69, 69, 28, 28, 26, 26, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:27,111 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:27,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:27,111 INFO L82 PathProgramCache]: Analyzing trace with hash -657930527, now seen corresponding path program 41 times [2019-09-07 12:06:27,111 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:27,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:27,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:27,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:27,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6374 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5698 trivial. 0 not checked. [2019-09-07 12:06:27,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:27,676 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:27,686 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:08:43,893 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2019-09-07 12:08:43,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:08:43,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 12:08:43,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:08:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6374 backedges. 2212 proven. 529 refuted. 0 times theorem prover too weak. 3633 trivial. 0 not checked. [2019-09-07 12:08:44,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:08:44,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 53 [2019-09-07 12:08:44,605 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-07 12:08:44,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-07 12:08:44,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2026, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 12:08:44,606 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand 53 states. [2019-09-07 12:08:44,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:08:44,868 INFO L93 Difference]: Finished difference Result 296 states and 307 transitions. [2019-09-07 12:08:44,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-09-07 12:08:44,868 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 278 [2019-09-07 12:08:44,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:08:44,870 INFO L225 Difference]: With dead ends: 296 [2019-09-07 12:08:44,870 INFO L226 Difference]: Without dead ends: 183 [2019-09-07 12:08:44,871 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=730, Invalid=2026, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 12:08:44,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-09-07 12:08:44,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2019-09-07 12:08:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-09-07 12:08:44,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 185 transitions. [2019-09-07 12:08:44,877 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 185 transitions. Word has length 278 [2019-09-07 12:08:44,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:08:44,877 INFO L475 AbstractCegarLoop]: Abstraction has 181 states and 185 transitions. [2019-09-07 12:08:44,877 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-07 12:08:44,877 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 185 transitions. [2019-09-07 12:08:44,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2019-09-07 12:08:44,879 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:08:44,879 INFO L399 BasicCegarLoop]: trace histogram [72, 72, 28, 28, 27, 27, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:08:44,879 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:08:44,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:08:44,880 INFO L82 PathProgramCache]: Analyzing trace with hash 267115101, now seen corresponding path program 42 times [2019-09-07 12:08:44,880 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:08:44,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:08:44,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:08:44,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:08:44,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:08:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:08:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6856 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 6072 trivial. 0 not checked. [2019-09-07 12:08:45,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:08:45,495 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:08:45,506 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:08:59,201 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2019-09-07 12:08:59,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:08:59,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 12:08:59,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:09:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6856 backedges. 2408 proven. 576 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2019-09-07 12:09:00,102 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:09:00,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27] total 56 [2019-09-07 12:09:00,103 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-09-07 12:09:00,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-09-07 12:09:00,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=815, Invalid=2265, Unknown=0, NotChecked=0, Total=3080 [2019-09-07 12:09:00,104 INFO L87 Difference]: Start difference. First operand 181 states and 185 transitions. Second operand 56 states. [2019-09-07 12:09:00,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:09:00,380 INFO L93 Difference]: Finished difference Result 305 states and 317 transitions. [2019-09-07 12:09:00,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-09-07 12:09:00,381 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 286 [2019-09-07 12:09:00,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:09:00,382 INFO L225 Difference]: With dead ends: 305 [2019-09-07 12:09:00,382 INFO L226 Difference]: Without dead ends: 187 [2019-09-07 12:09:00,383 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=815, Invalid=2265, Unknown=0, NotChecked=0, Total=3080 [2019-09-07 12:09:00,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-09-07 12:09:00,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2019-09-07 12:09:00,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-09-07 12:09:00,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2019-09-07 12:09:00,389 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 286 [2019-09-07 12:09:00,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:09:00,389 INFO L475 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2019-09-07 12:09:00,389 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-09-07 12:09:00,389 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2019-09-07 12:09:00,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2019-09-07 12:09:00,391 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:09:00,392 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 29, 29, 27, 27, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:09:00,392 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:09:00,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:09:00,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1227450557, now seen corresponding path program 43 times [2019-09-07 12:09:00,392 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:09:00,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:09:00,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:00,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:09:00,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:09:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7360 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 6631 trivial. 0 not checked. [2019-09-07 12:09:00,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:09:00,972 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:09:00,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:09:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:09:01,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-07 12:09:01,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:09:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7360 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 6519 trivial. 0 not checked. [2019-09-07 12:09:02,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:09:02,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32] total 60 [2019-09-07 12:09:02,032 INFO L454 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-09-07 12:09:02,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-09-07 12:09:02,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=930, Invalid=2610, Unknown=0, NotChecked=0, Total=3540 [2019-09-07 12:09:02,033 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand 60 states. [2019-09-07 12:09:02,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:09:02,314 INFO L93 Difference]: Finished difference Result 311 states and 320 transitions. [2019-09-07 12:09:02,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-09-07 12:09:02,314 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 294 [2019-09-07 12:09:02,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:09:02,316 INFO L225 Difference]: With dead ends: 311 [2019-09-07 12:09:02,316 INFO L226 Difference]: Without dead ends: 191 [2019-09-07 12:09:02,317 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=930, Invalid=2610, Unknown=0, NotChecked=0, Total=3540 [2019-09-07 12:09:02,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-09-07 12:09:02,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2019-09-07 12:09:02,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-09-07 12:09:02,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 193 transitions. [2019-09-07 12:09:02,323 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 193 transitions. Word has length 294 [2019-09-07 12:09:02,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:09:02,324 INFO L475 AbstractCegarLoop]: Abstraction has 189 states and 193 transitions. [2019-09-07 12:09:02,324 INFO L476 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-09-07 12:09:02,324 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 193 transitions. [2019-09-07 12:09:02,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2019-09-07 12:09:02,326 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:09:02,326 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 30, 30, 28, 28, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:09:02,326 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:09:02,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:09:02,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1906956771, now seen corresponding path program 44 times [2019-09-07 12:09:02,327 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:09:02,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:09:02,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:02,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:09:02,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:09:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 6690 trivial. 0 not checked. [2019-09-07 12:09:02,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:09:02,976 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:09:02,997 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:09:03,146 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:09:03,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:09:03,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 12:09:03,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:09:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 6574 trivial. 0 not checked. [2019-09-07 12:09:04,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:09:04,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33] total 62 [2019-09-07 12:09:04,119 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-07 12:09:04,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-07 12:09:04,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2019-09-07 12:09:04,120 INFO L87 Difference]: Start difference. First operand 189 states and 193 transitions. Second operand 62 states. [2019-09-07 12:09:04,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:09:04,417 INFO L93 Difference]: Finished difference Result 317 states and 326 transitions. [2019-09-07 12:09:04,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-07 12:09:04,417 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 298 [2019-09-07 12:09:04,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:09:04,419 INFO L225 Difference]: With dead ends: 317 [2019-09-07 12:09:04,419 INFO L226 Difference]: Without dead ends: 195 [2019-09-07 12:09:04,420 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2019-09-07 12:09:04,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-09-07 12:09:04,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2019-09-07 12:09:04,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2019-09-07 12:09:04,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 197 transitions. [2019-09-07 12:09:04,427 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 197 transitions. Word has length 298 [2019-09-07 12:09:04,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:09:04,427 INFO L475 AbstractCegarLoop]: Abstraction has 193 states and 197 transitions. [2019-09-07 12:09:04,428 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-07 12:09:04,428 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 197 transitions. [2019-09-07 12:09:04,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2019-09-07 12:09:04,429 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:09:04,430 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 31, 31, 29, 29, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:09:04,430 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:09:04,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:09:04,430 INFO L82 PathProgramCache]: Analyzing trace with hash -2131686787, now seen corresponding path program 45 times [2019-09-07 12:09:04,430 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:09:04,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:09:04,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:04,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:09:04,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:04,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:09:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7592 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 6751 trivial. 0 not checked. [2019-09-07 12:09:05,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:09:05,107 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:09:05,118 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:09:25,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2019-09-07 12:09:25,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:09:25,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 73 conjunts are in the unsatisfiable core [2019-09-07 12:09:25,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:09:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7592 backedges. 2726 proven. 625 refuted. 0 times theorem prover too weak. 4241 trivial. 0 not checked. [2019-09-07 12:09:27,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:09:27,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2019-09-07 12:09:27,045 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-07 12:09:27,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-07 12:09:27,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=2839, Unknown=0, NotChecked=0, Total=3782 [2019-09-07 12:09:27,046 INFO L87 Difference]: Start difference. First operand 193 states and 197 transitions. Second operand 62 states. [2019-09-07 12:09:28,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:09:28,429 INFO L93 Difference]: Finished difference Result 323 states and 335 transitions. [2019-09-07 12:09:28,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-07 12:09:28,430 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 302 [2019-09-07 12:09:28,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:09:28,431 INFO L225 Difference]: With dead ends: 323 [2019-09-07 12:09:28,431 INFO L226 Difference]: Without dead ends: 200 [2019-09-07 12:09:28,433 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2063, Invalid=6679, Unknown=0, NotChecked=0, Total=8742 [2019-09-07 12:09:28,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-09-07 12:09:28,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2019-09-07 12:09:28,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-09-07 12:09:28,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 203 transitions. [2019-09-07 12:09:28,440 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 203 transitions. Word has length 302 [2019-09-07 12:09:28,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:09:28,440 INFO L475 AbstractCegarLoop]: Abstraction has 199 states and 203 transitions. [2019-09-07 12:09:28,440 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-07 12:09:28,440 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 203 transitions. [2019-09-07 12:09:28,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2019-09-07 12:09:28,442 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:09:28,442 INFO L399 BasicCegarLoop]: trace histogram [78, 78, 31, 31, 31, 31, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:09:28,443 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:09:28,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:09:28,443 INFO L82 PathProgramCache]: Analyzing trace with hash 779858679, now seen corresponding path program 46 times [2019-09-07 12:09:28,443 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:09:28,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:09:28,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:28,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:09:28,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:09:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 7216 trivial. 0 not checked. [2019-09-07 12:09:29,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:09:29,269 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:09:29,289 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:09:29,499 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:09:29,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:09:29,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 12:09:29,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:09:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 2816 proven. 676 refuted. 0 times theorem prover too weak. 4685 trivial. 0 not checked. [2019-09-07 12:09:30,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:09:30,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 29] total 61 [2019-09-07 12:09:30,501 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-09-07 12:09:30,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-09-07 12:09:30,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=966, Invalid=2694, Unknown=0, NotChecked=0, Total=3660 [2019-09-07 12:09:30,503 INFO L87 Difference]: Start difference. First operand 199 states and 203 transitions. Second operand 61 states. [2019-09-07 12:09:30,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:09:30,817 INFO L93 Difference]: Finished difference Result 335 states and 347 transitions. [2019-09-07 12:09:30,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-09-07 12:09:30,818 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 312 [2019-09-07 12:09:30,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:09:30,819 INFO L225 Difference]: With dead ends: 335 [2019-09-07 12:09:30,821 INFO L226 Difference]: Without dead ends: 205 [2019-09-07 12:09:30,822 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=966, Invalid=2694, Unknown=0, NotChecked=0, Total=3660 [2019-09-07 12:09:30,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-09-07 12:09:30,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2019-09-07 12:09:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-09-07 12:09:30,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 207 transitions. [2019-09-07 12:09:30,832 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 207 transitions. Word has length 312 [2019-09-07 12:09:30,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:09:30,832 INFO L475 AbstractCegarLoop]: Abstraction has 203 states and 207 transitions. [2019-09-07 12:09:30,833 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-09-07 12:09:30,833 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 207 transitions. [2019-09-07 12:09:30,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2019-09-07 12:09:30,836 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:09:30,837 INFO L399 BasicCegarLoop]: trace histogram [81, 81, 32, 32, 31, 31, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:09:30,837 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:09:30,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:09:30,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1353485143, now seen corresponding path program 47 times [2019-09-07 12:09:30,838 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:09:30,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:09:30,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:30,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:09:30,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:09:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8723 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 7699 trivial. 0 not checked. [2019-09-07 12:09:31,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:09:31,990 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:09:32,007 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:12:28,388 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2019-09-07 12:12:28,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:12:28,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 12:12:28,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:12:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8723 backedges. 3028 proven. 729 refuted. 0 times theorem prover too weak. 4966 trivial. 0 not checked. [2019-09-07 12:12:29,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:12:29,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 30] total 63 [2019-09-07 12:12:29,403 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-07 12:12:29,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-07 12:12:29,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1029, Invalid=2877, Unknown=0, NotChecked=0, Total=3906 [2019-09-07 12:12:29,404 INFO L87 Difference]: Start difference. First operand 203 states and 207 transitions. Second operand 63 states. [2019-09-07 12:12:29,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:12:29,722 INFO L93 Difference]: Finished difference Result 341 states and 353 transitions. [2019-09-07 12:12:29,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-07 12:12:29,723 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 320 [2019-09-07 12:12:29,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:12:29,724 INFO L225 Difference]: With dead ends: 341 [2019-09-07 12:12:29,724 INFO L226 Difference]: Without dead ends: 209 [2019-09-07 12:12:29,725 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1029, Invalid=2877, Unknown=0, NotChecked=0, Total=3906 [2019-09-07 12:12:29,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-09-07 12:12:29,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2019-09-07 12:12:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-09-07 12:12:29,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 211 transitions. [2019-09-07 12:12:29,732 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 211 transitions. Word has length 320 [2019-09-07 12:12:29,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:12:29,732 INFO L475 AbstractCegarLoop]: Abstraction has 207 states and 211 transitions. [2019-09-07 12:12:29,732 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-07 12:12:29,732 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 211 transitions. [2019-09-07 12:12:29,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2019-09-07 12:12:29,734 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:12:29,735 INFO L399 BasicCegarLoop]: trace histogram [84, 84, 33, 33, 31, 31, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:12:29,735 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:12:29,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:12:29,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1322310071, now seen corresponding path program 48 times [2019-09-07 12:12:29,735 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:12:29,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:12:29,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:12:29,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:12:29,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:12:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:12:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9289 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 8328 trivial. 0 not checked. [2019-09-07 12:12:30,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:12:30,535 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:12:30,546 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:12:51,584 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2019-09-07 12:12:51,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:12:51,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 12:12:51,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:12:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9289 backedges. 3256 proven. 784 refuted. 0 times theorem prover too weak. 5249 trivial. 0 not checked. [2019-09-07 12:12:52,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:12:52,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31] total 63 [2019-09-07 12:12:52,622 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-07 12:12:52,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-07 12:12:52,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=2881, Unknown=0, NotChecked=0, Total=3906 [2019-09-07 12:12:52,623 INFO L87 Difference]: Start difference. First operand 207 states and 211 transitions. Second operand 63 states. [2019-09-07 12:12:52,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:12:52,909 INFO L93 Difference]: Finished difference Result 346 states and 357 transitions. [2019-09-07 12:12:52,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-07 12:12:52,910 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 328 [2019-09-07 12:12:52,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:12:52,911 INFO L225 Difference]: With dead ends: 346 [2019-09-07 12:12:52,911 INFO L226 Difference]: Without dead ends: 213 [2019-09-07 12:12:52,912 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1025, Invalid=2881, Unknown=0, NotChecked=0, Total=3906 [2019-09-07 12:12:52,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-09-07 12:12:52,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 211. [2019-09-07 12:12:52,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-09-07 12:12:52,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 215 transitions. [2019-09-07 12:12:52,923 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 215 transitions. Word has length 328 [2019-09-07 12:12:52,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:12:52,923 INFO L475 AbstractCegarLoop]: Abstraction has 211 states and 215 transitions. [2019-09-07 12:12:52,923 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-07 12:12:52,923 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 215 transitions. [2019-09-07 12:12:52,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2019-09-07 12:12:52,925 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:12:52,925 INFO L399 BasicCegarLoop]: trace histogram [87, 87, 33, 33, 32, 32, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:12:52,926 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:12:52,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:12:52,926 INFO L82 PathProgramCache]: Analyzing trace with hash -22871501, now seen corresponding path program 49 times [2019-09-07 12:12:52,926 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:12:52,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:12:52,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:12:52,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:12:52,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:12:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:12:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9871 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 8782 trivial. 0 not checked. [2019-09-07 12:12:53,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:12:53,732 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:12:53,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:12:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:12:53,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-07 12:12:53,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:12:54,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9871 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 8782 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (51)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:12:54,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:12:54,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-09-07 12:12:54,020 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-07 12:12:54,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-07 12:12:54,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 12:12:54,021 INFO L87 Difference]: Start difference. First operand 211 states and 215 transitions. Second operand 37 states. [2019-09-07 12:12:54,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:12:54,118 INFO L93 Difference]: Finished difference Result 352 states and 360 transitions. [2019-09-07 12:12:54,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 12:12:54,119 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 336 [2019-09-07 12:12:54,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:12:54,121 INFO L225 Difference]: With dead ends: 352 [2019-09-07 12:12:54,121 INFO L226 Difference]: Without dead ends: 214 [2019-09-07 12:12:54,122 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 12:12:54,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-09-07 12:12:54,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2019-09-07 12:12:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-09-07 12:12:54,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2019-09-07 12:12:54,129 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 336 [2019-09-07 12:12:54,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:12:54,129 INFO L475 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2019-09-07 12:12:54,129 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-07 12:12:54,129 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2019-09-07 12:12:54,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2019-09-07 12:12:54,131 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:12:54,132 INFO L399 BasicCegarLoop]: trace histogram [87, 87, 34, 34, 32, 32, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:12:54,132 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:12:54,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:12:54,132 INFO L82 PathProgramCache]: Analyzing trace with hash 2113524373, now seen corresponding path program 50 times [2019-09-07 12:12:54,132 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:12:54,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:12:54,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:12:54,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:12:54,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:12:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:12:55,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9938 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 8914 trivial. 0 not checked. [2019-09-07 12:12:55,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:12:55,115 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:12:55,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:12:55,300 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:12:55,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:12:55,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-07 12:12:55,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:12:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9938 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 8782 trivial. 0 not checked. [2019-09-07 12:12:56,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:12:56,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 37] total 70 [2019-09-07 12:12:56,542 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-09-07 12:12:56,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-09-07 12:12:56,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1260, Invalid=3570, Unknown=0, NotChecked=0, Total=4830 [2019-09-07 12:12:56,543 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand 70 states. [2019-09-07 12:12:56,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:12:56,871 INFO L93 Difference]: Finished difference Result 357 states and 366 transitions. [2019-09-07 12:12:56,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-09-07 12:12:56,872 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 338 [2019-09-07 12:12:56,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:12:56,874 INFO L225 Difference]: With dead ends: 357 [2019-09-07 12:12:56,874 INFO L226 Difference]: Without dead ends: 219 [2019-09-07 12:12:56,876 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1260, Invalid=3570, Unknown=0, NotChecked=0, Total=4830 [2019-09-07 12:12:56,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-09-07 12:12:56,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2019-09-07 12:12:56,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-09-07 12:12:56,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 221 transitions. [2019-09-07 12:12:56,883 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 221 transitions. Word has length 338 [2019-09-07 12:12:56,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:12:56,883 INFO L475 AbstractCegarLoop]: Abstraction has 217 states and 221 transitions. [2019-09-07 12:12:56,884 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-09-07 12:12:56,884 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 221 transitions. [2019-09-07 12:12:56,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2019-09-07 12:12:56,886 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:12:56,886 INFO L399 BasicCegarLoop]: trace histogram [87, 87, 35, 35, 33, 33, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:12:56,886 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:12:56,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:12:56,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1804947723, now seen corresponding path program 51 times [2019-09-07 12:12:56,887 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:12:56,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:12:56,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:12:56,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:12:56,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:12:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:12:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10072 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 8983 trivial. 0 not checked. [2019-09-07 12:12:57,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:12:57,804 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:12:57,815 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:13:10,653 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-09-07 12:13:10,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:13:10,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 53 conjunts are in the unsatisfiable core [2019-09-07 12:13:10,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:13:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10072 backedges. 3622 proven. 841 refuted. 0 times theorem prover too weak. 5609 trivial. 0 not checked. [2019-09-07 12:13:11,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:13:11,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2019-09-07 12:13:11,884 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-09-07 12:13:11,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-09-07 12:13:11,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1203, Invalid=3627, Unknown=0, NotChecked=0, Total=4830 [2019-09-07 12:13:11,885 INFO L87 Difference]: Start difference. First operand 217 states and 221 transitions. Second operand 70 states. [2019-09-07 12:13:13,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:13:13,719 INFO L93 Difference]: Finished difference Result 363 states and 375 transitions. [2019-09-07 12:13:13,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-09-07 12:13:13,719 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 342 [2019-09-07 12:13:13,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:13:13,721 INFO L225 Difference]: With dead ends: 363 [2019-09-07 12:13:13,721 INFO L226 Difference]: Without dead ends: 224 [2019-09-07 12:13:13,723 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 309 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2607, Invalid=8523, Unknown=0, NotChecked=0, Total=11130 [2019-09-07 12:13:13,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-09-07 12:13:13,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2019-09-07 12:13:13,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-09-07 12:13:13,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 227 transitions. [2019-09-07 12:13:13,731 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 227 transitions. Word has length 342 [2019-09-07 12:13:13,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:13:13,732 INFO L475 AbstractCegarLoop]: Abstraction has 223 states and 227 transitions. [2019-09-07 12:13:13,732 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-09-07 12:13:13,732 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 227 transitions. [2019-09-07 12:13:13,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2019-09-07 12:13:13,736 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:13:13,736 INFO L399 BasicCegarLoop]: trace histogram [90, 90, 35, 35, 35, 35, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:13:13,737 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:13:13,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:13:13,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2072550767, now seen corresponding path program 52 times [2019-09-07 12:13:13,738 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:13:13,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:13:13,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:13:13,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:13:13,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:13:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:13:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10745 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 9520 trivial. 0 not checked. [2019-09-07 12:13:14,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:13:14,751 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:13:14,763 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:13:14,946 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:13:14,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:13:14,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-07 12:13:14,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:13:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10745 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 9520 trivial. 0 not checked. [2019-09-07 12:13:15,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:13:15,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-09-07 12:13:15,012 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-07 12:13:15,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-07 12:13:15,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 12:13:15,013 INFO L87 Difference]: Start difference. First operand 223 states and 227 transitions. Second operand 39 states. [2019-09-07 12:13:15,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:13:15,177 INFO L93 Difference]: Finished difference Result 372 states and 380 transitions. [2019-09-07 12:13:15,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-07 12:13:15,182 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 352 [2019-09-07 12:13:15,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:13:15,184 INFO L225 Difference]: With dead ends: 372 [2019-09-07 12:13:15,184 INFO L226 Difference]: Without dead ends: 226 [2019-09-07 12:13:15,185 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 12:13:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-09-07 12:13:15,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2019-09-07 12:13:15,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-09-07 12:13:15,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 229 transitions. [2019-09-07 12:13:15,191 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 229 transitions. Word has length 352 [2019-09-07 12:13:15,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:13:15,191 INFO L475 AbstractCegarLoop]: Abstraction has 225 states and 229 transitions. [2019-09-07 12:13:15,191 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-07 12:13:15,192 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 229 transitions. [2019-09-07 12:13:15,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2019-09-07 12:13:15,194 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:13:15,194 INFO L399 BasicCegarLoop]: trace histogram [90, 90, 36, 36, 35, 35, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:13:15,194 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:13:15,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:13:15,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1950771665, now seen corresponding path program 53 times [2019-09-07 12:13:15,195 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:13:15,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:13:15,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:13:15,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:13:15,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:13:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:13:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 9520 trivial. 0 not checked. [2019-09-07 12:13:16,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:13:16,148 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:13:16,158 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1