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/recursive-simple/fibo_2calls_15-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:15:26,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:15:26,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:15:26,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 06:15:26,693 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 06:15:26,694 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 06:15:26,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 06:15:26,697 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 06:15:26,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 06:15:26,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 06:15:26,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 06:15:26,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 06:15:26,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:15:26,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:15:26,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:15:26,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:15:26,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:15:26,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:15:26,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:15:26,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:15:26,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:15:26,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:15:26,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:15:26,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:15:26,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 06:15:26,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:15:26,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:15:26,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:15:26,731 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 [2019-09-08 06:15:26,747 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:15:26,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:15:26,749 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:15:26,749 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:15:26,750 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:15:26,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:15:26,750 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:15:26,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:15:26,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:15:26,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:15:26,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:15:26,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:15:26,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:15:26,752 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:15:26,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:15:26,752 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:15:26,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:15:26,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:15:26,753 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:15:26,753 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:15:26,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:15:26,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:15:26,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:15:26,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:15:26,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:15:26,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:15:26,754 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:15:26,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:15:26,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:15:26,788 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:15:26,801 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:15:26,806 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:15:26,808 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:15:26,808 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:15:26,809 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_15-2.c [2019-09-08 06:15:26,898 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/099d23aa9/0207dc4bf8594352b38c5a25c688d5d9/FLAG8b8dd9152 [2019-09-08 06:15:27,472 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:15:27,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_15-2.c [2019-09-08 06:15:27,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/099d23aa9/0207dc4bf8594352b38c5a25c688d5d9/FLAG8b8dd9152 [2019-09-08 06:15:27,809 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/099d23aa9/0207dc4bf8594352b38c5a25c688d5d9 [2019-09-08 06:15:27,822 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:15:27,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:15:27,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:15:27,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:15:27,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:15:27,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:15:27" (1/1) ... [2019-09-08 06:15:27,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6889e44c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:15:27, skipping insertion in model container [2019-09-08 06:15:27,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:15:27" (1/1) ... [2019-09-08 06:15:27,843 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:15:27,863 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:15:28,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:15:28,062 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:15:28,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:15:28,104 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:15:28,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:15:28 WrapperNode [2019-09-08 06:15:28,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:15:28,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:15:28,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:15:28,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:15:28,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:15:28" (1/1) ... [2019-09-08 06:15:28,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:15:28" (1/1) ... [2019-09-08 06:15:28,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:15:28" (1/1) ... [2019-09-08 06:15:28,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:15:28" (1/1) ... [2019-09-08 06:15:28,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:15:28" (1/1) ... [2019-09-08 06:15:28,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:15:28" (1/1) ... [2019-09-08 06:15:28,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:15:28" (1/1) ... [2019-09-08 06:15:28,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:15:28,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:15:28,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:15:28,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:15:28,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:15:28" (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 [2019-09-08 06:15:28,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:15:28,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:15:28,309 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-09-08 06:15:28,309 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-09-08 06:15:28,310 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:15:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 06:15:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:15:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-09-08 06:15:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-09-08 06:15:28,311 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:15:28,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:15:28,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:15:28,545 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:15:28,546 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:15:28,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:15:28 BoogieIcfgContainer [2019-09-08 06:15:28,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:15:28,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:15:28,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:15:28,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:15:28,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:15:27" (1/3) ... [2019-09-08 06:15:28,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a74eaef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:15:28, skipping insertion in model container [2019-09-08 06:15:28,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:15:28" (2/3) ... [2019-09-08 06:15:28,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a74eaef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:15:28, skipping insertion in model container [2019-09-08 06:15:28,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:15:28" (3/3) ... [2019-09-08 06:15:28,588 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_15-2.c [2019-09-08 06:15:28,617 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:15:28,646 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:15:28,673 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:15:28,708 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:15:28,709 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:15:28,709 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:15:28,709 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:15:28,709 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:15:28,710 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:15:28,710 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:15:28,710 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:15:28,710 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:15:28,731 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-09-08 06:15:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 06:15:28,736 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:28,737 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:28,739 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:28,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2019-09-08 06:15:28,745 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:28,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:28,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:28,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:15:28,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:15:28,914 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:15:28,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:15:28,920 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:15:28,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:15:28,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:15:28,935 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2019-09-08 06:15:29,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:29,079 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-09-08 06:15:29,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:15:29,081 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-08 06:15:29,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:29,091 INFO L225 Difference]: With dead ends: 44 [2019-09-08 06:15:29,091 INFO L226 Difference]: Without dead ends: 30 [2019-09-08 06:15:29,095 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:15:29,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-08 06:15:29,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-08 06:15:29,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:15:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-09-08 06:15:29,147 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2019-09-08 06:15:29,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:29,148 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-09-08 06:15:29,148 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:15:29,148 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-09-08 06:15:29,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-08 06:15:29,151 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:29,151 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:29,151 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:29,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:29,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2019-09-08 06:15:29,152 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:29,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:29,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:29,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:15:29,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:15:29,194 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:15:29,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:15:29,196 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:15:29,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:15:29,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:15:29,198 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2019-09-08 06:15:29,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:29,286 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2019-09-08 06:15:29,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:15:29,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-09-08 06:15:29,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:29,288 INFO L225 Difference]: With dead ends: 36 [2019-09-08 06:15:29,289 INFO L226 Difference]: Without dead ends: 32 [2019-09-08 06:15:29,291 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:15:29,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-08 06:15:29,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-09-08 06:15:29,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:15:29,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-09-08 06:15:29,310 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2019-09-08 06:15:29,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:29,311 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-09-08 06:15:29,311 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:15:29,311 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-09-08 06:15:29,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-08 06:15:29,313 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:29,313 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:29,314 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:29,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:29,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2019-09-08 06:15:29,315 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:29,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:29,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:29,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:15:29,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:15:29,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:29,451 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) [2019-09-08 06:15:29,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:29,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:15:29,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:15:29,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:29,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2019-09-08 06:15:29,648 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-08 06:15:29,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-08 06:15:29,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:15:29,649 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2019-09-08 06:15:29,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:29,926 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2019-09-08 06:15:29,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 06:15:29,928 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-09-08 06:15:29,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:29,930 INFO L225 Difference]: With dead ends: 58 [2019-09-08 06:15:29,930 INFO L226 Difference]: Without dead ends: 34 [2019-09-08 06:15:29,932 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:15:29,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-08 06:15:29,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-09-08 06:15:29,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-08 06:15:29,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-09-08 06:15:29,942 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2019-09-08 06:15:29,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:29,943 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-09-08 06:15:29,943 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-08 06:15:29,943 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-09-08 06:15:29,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-08 06:15:29,945 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:29,946 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:29,946 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:29,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:29,947 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2019-09-08 06:15:29,947 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:29,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:29,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:29,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:15:29,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:15:30,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:30,035 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:30,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:15:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:30,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:15:30,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:15:30,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:30,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-09-08 06:15:30,120 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 06:15:30,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 06:15:30,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-08 06:15:30,121 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2019-09-08 06:15:30,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:30,267 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2019-09-08 06:15:30,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:15:30,268 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-09-08 06:15:30,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:30,271 INFO L225 Difference]: With dead ends: 43 [2019-09-08 06:15:30,271 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 06:15:30,272 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:15:30,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 06:15:30,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-09-08 06:15:30,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-08 06:15:30,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2019-09-08 06:15:30,294 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2019-09-08 06:15:30,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:30,294 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-09-08 06:15:30,294 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 06:15:30,294 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2019-09-08 06:15:30,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-08 06:15:30,301 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:30,301 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:30,302 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:30,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:30,304 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2019-09-08 06:15:30,304 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:30,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:30,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:30,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:15:30,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-08 06:15:30,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:30,447 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:15:30,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:30,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:15:30,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-08 06:15:30,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:30,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2019-09-08 06:15:30,585 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 06:15:30,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 06:15:30,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:15:30,586 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2019-09-08 06:15:30,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:30,831 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2019-09-08 06:15:30,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:15:30,833 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2019-09-08 06:15:30,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:30,835 INFO L225 Difference]: With dead ends: 70 [2019-09-08 06:15:30,835 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 06:15:30,840 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:15:30,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 06:15:30,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-08 06:15:30,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 06:15:30,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2019-09-08 06:15:30,862 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2019-09-08 06:15:30,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:30,866 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2019-09-08 06:15:30,866 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 06:15:30,866 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2019-09-08 06:15:30,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-08 06:15:30,870 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:30,870 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:30,870 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:30,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:30,871 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2019-09-08 06:15:30,872 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:30,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:30,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:30,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:15:30,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-08 06:15:31,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:31,069 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:15:31,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:31,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:15:31,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-08 06:15:31,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:31,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-09-08 06:15:31,242 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:15:31,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:15:31,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:15:31,243 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 14 states. [2019-09-08 06:15:31,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:31,855 INFO L93 Difference]: Finished difference Result 102 states and 162 transitions. [2019-09-08 06:15:31,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:15:31,857 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2019-09-08 06:15:31,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:31,860 INFO L225 Difference]: With dead ends: 102 [2019-09-08 06:15:31,861 INFO L226 Difference]: Without dead ends: 69 [2019-09-08 06:15:31,869 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2019-09-08 06:15:31,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-08 06:15:31,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2019-09-08 06:15:31,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:15:31,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 90 transitions. [2019-09-08 06:15:31,899 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 90 transitions. Word has length 40 [2019-09-08 06:15:31,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:31,900 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 90 transitions. [2019-09-08 06:15:31,900 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:15:31,900 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 90 transitions. [2019-09-08 06:15:31,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-08 06:15:31,903 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:31,903 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:31,903 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:31,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:31,904 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2019-09-08 06:15:31,904 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:31,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:31,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:31,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:15:31,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-09-08 06:15:31,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:31,994 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:15:32,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:32,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-08 06:15:32,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-09-08 06:15:32,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:32,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2019-09-08 06:15:32,138 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 06:15:32,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 06:15:32,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:15:32,139 INFO L87 Difference]: Start difference. First operand 60 states and 90 transitions. Second operand 12 states. [2019-09-08 06:15:32,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:32,387 INFO L93 Difference]: Finished difference Result 106 states and 197 transitions. [2019-09-08 06:15:32,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 06:15:32,387 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2019-09-08 06:15:32,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:32,391 INFO L225 Difference]: With dead ends: 106 [2019-09-08 06:15:32,391 INFO L226 Difference]: Without dead ends: 102 [2019-09-08 06:15:32,393 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:15:32,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-09-08 06:15:32,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2019-09-08 06:15:32,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-08 06:15:32,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 110 transitions. [2019-09-08 06:15:32,415 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 110 transitions. Word has length 54 [2019-09-08 06:15:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:32,416 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 110 transitions. [2019-09-08 06:15:32,416 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 06:15:32,417 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 110 transitions. [2019-09-08 06:15:32,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-08 06:15:32,419 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:32,419 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:32,420 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:32,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:32,420 INFO L82 PathProgramCache]: Analyzing trace with hash 367128822, now seen corresponding path program 1 times [2019-09-08 06:15:32,420 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:32,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:32,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:32,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:15:32,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-09-08 06:15:32,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:32,544 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:32,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:15:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:32,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 06:15:32,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 12 proven. 71 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-09-08 06:15:32,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:32,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2019-09-08 06:15:32,677 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 06:15:32,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 06:15:32,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:15:32,679 INFO L87 Difference]: Start difference. First operand 68 states and 110 transitions. Second operand 12 states. [2019-09-08 06:15:32,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:32,954 INFO L93 Difference]: Finished difference Result 126 states and 279 transitions. [2019-09-08 06:15:32,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 06:15:32,955 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2019-09-08 06:15:32,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:32,960 INFO L225 Difference]: With dead ends: 126 [2019-09-08 06:15:32,960 INFO L226 Difference]: Without dead ends: 122 [2019-09-08 06:15:32,961 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:15:32,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-09-08 06:15:33,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 72. [2019-09-08 06:15:33,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-08 06:15:33,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 125 transitions. [2019-09-08 06:15:33,011 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 125 transitions. Word has length 83 [2019-09-08 06:15:33,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:33,012 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 125 transitions. [2019-09-08 06:15:33,012 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 06:15:33,012 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 125 transitions. [2019-09-08 06:15:33,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-09-08 06:15:33,016 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:33,017 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 10, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:33,017 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:33,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:33,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1306814134, now seen corresponding path program 2 times [2019-09-08 06:15:33,018 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:33,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:33,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:33,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:15:33,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 50 proven. 172 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2019-09-08 06:15:33,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:33,215 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:33,234 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:15:33,291 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:15:33,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:15:33,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-08 06:15:33,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 37 proven. 237 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-09-08 06:15:33,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:33,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2019-09-08 06:15:33,475 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-08 06:15:33,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-08 06:15:33,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:15:33,476 INFO L87 Difference]: Start difference. First operand 72 states and 125 transitions. Second operand 16 states. [2019-09-08 06:15:33,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:33,908 INFO L93 Difference]: Finished difference Result 161 states and 446 transitions. [2019-09-08 06:15:33,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:15:33,909 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 162 [2019-09-08 06:15:33,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:33,915 INFO L225 Difference]: With dead ends: 161 [2019-09-08 06:15:33,915 INFO L226 Difference]: Without dead ends: 157 [2019-09-08 06:15:33,917 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2019-09-08 06:15:33,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-09-08 06:15:33,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 87. [2019-09-08 06:15:33,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-08 06:15:33,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 171 transitions. [2019-09-08 06:15:33,944 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 171 transitions. Word has length 162 [2019-09-08 06:15:33,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:33,945 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 171 transitions. [2019-09-08 06:15:33,945 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-08 06:15:33,946 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 171 transitions. [2019-09-08 06:15:33,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2019-09-08 06:15:33,959 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:33,960 INFO L399 BasicCegarLoop]: trace histogram [39, 39, 37, 32, 32, 27, 21, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 8, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:33,960 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:33,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:33,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1211732598, now seen corresponding path program 1 times [2019-09-08 06:15:33,961 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:33,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:33,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:33,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:15:33,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7129 backedges. 221 proven. 758 refuted. 0 times theorem prover too weak. 6150 trivial. 0 not checked. [2019-09-08 06:15:34,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:34,407 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:34,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:15:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:34,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-08 06:15:34,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7129 backedges. 172 proven. 1097 refuted. 0 times theorem prover too weak. 5860 trivial. 0 not checked. [2019-09-08 06:15:35,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:35,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2019-09-08 06:15:35,143 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 06:15:35,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 06:15:35,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:15:35,145 INFO L87 Difference]: Start difference. First operand 87 states and 171 transitions. Second operand 19 states. [2019-09-08 06:15:36,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:36,258 INFO L93 Difference]: Finished difference Result 250 states and 676 transitions. [2019-09-08 06:15:36,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 06:15:36,259 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 497 [2019-09-08 06:15:36,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:36,264 INFO L225 Difference]: With dead ends: 250 [2019-09-08 06:15:36,265 INFO L226 Difference]: Without dead ends: 169 [2019-09-08 06:15:36,269 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=296, Invalid=1426, Unknown=0, NotChecked=0, Total=1722 [2019-09-08 06:15:36,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-09-08 06:15:36,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 146. [2019-09-08 06:15:36,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-09-08 06:15:36,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 252 transitions. [2019-09-08 06:15:36,293 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 252 transitions. Word has length 497 [2019-09-08 06:15:36,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:36,293 INFO L475 AbstractCegarLoop]: Abstraction has 146 states and 252 transitions. [2019-09-08 06:15:36,293 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 06:15:36,294 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 252 transitions. [2019-09-08 06:15:36,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2019-09-08 06:15:36,301 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:36,301 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 23, 23, 22, 20, 15, 15, 15, 15, 15, 15, 15, 11, 11, 11, 11, 11, 11, 11, 11, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:36,301 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:36,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:36,302 INFO L82 PathProgramCache]: Analyzing trace with hash -59781395, now seen corresponding path program 2 times [2019-09-08 06:15:36,302 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:36,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:36,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:36,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:15:36,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 142 proven. 629 refuted. 0 times theorem prover too weak. 3042 trivial. 0 not checked. [2019-09-08 06:15:36,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:36,606 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) [2019-09-08 06:15:36,633 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 [2019-09-08 06:15:36,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:15:36,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:15:36,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-08 06:15:36,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 108 proven. 891 refuted. 0 times theorem prover too weak. 2814 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (10)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:15:37,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:37,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 18 [2019-09-08 06:15:37,059 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 06:15:37,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 06:15:37,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:15:37,061 INFO L87 Difference]: Start difference. First operand 146 states and 252 transitions. Second operand 18 states. [2019-09-08 06:15:37,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:37,558 INFO L93 Difference]: Finished difference Result 203 states and 444 transitions. [2019-09-08 06:15:37,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 06:15:37,559 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 367 [2019-09-08 06:15:37,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:37,565 INFO L225 Difference]: With dead ends: 203 [2019-09-08 06:15:37,566 INFO L226 Difference]: Without dead ends: 199 [2019-09-08 06:15:37,567 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2019-09-08 06:15:37,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-09-08 06:15:37,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 168. [2019-09-08 06:15:37,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-09-08 06:15:37,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 321 transitions. [2019-09-08 06:15:37,591 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 321 transitions. Word has length 367 [2019-09-08 06:15:37,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:37,592 INFO L475 AbstractCegarLoop]: Abstraction has 168 states and 321 transitions. [2019-09-08 06:15:37,592 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 06:15:37,592 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 321 transitions. [2019-09-08 06:15:37,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1146 [2019-09-08 06:15:37,643 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:37,644 INFO L399 BasicCegarLoop]: trace histogram [86, 86, 83, 83, 67, 57, 43, 43, 43, 43, 43, 43, 43, 41, 41, 41, 41, 41, 41, 41, 26, 26, 19, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:37,645 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:37,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:37,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1299973393, now seen corresponding path program 3 times [2019-09-08 06:15:37,646 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:37,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:37,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:37,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:15:37,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 38931 backedges. 518 proven. 2503 refuted. 0 times theorem prover too weak. 35910 trivial. 0 not checked. [2019-09-08 06:15:39,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:39,296 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 [2019-09-08 06:15:39,326 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:15:39,442 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-09-08 06:15:39,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:15:39,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:15:39,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 38931 backedges. 3590 proven. 6 refuted. 0 times theorem prover too weak. 35335 trivial. 0 not checked. [2019-09-08 06:15:40,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:40,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2019-09-08 06:15:40,321 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 06:15:40,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 06:15:40,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:15:40,322 INFO L87 Difference]: Start difference. First operand 168 states and 321 transitions. Second operand 17 states. [2019-09-08 06:15:41,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:41,338 INFO L93 Difference]: Finished difference Result 477 states and 1329 transitions. [2019-09-08 06:15:41,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 06:15:41,346 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1145 [2019-09-08 06:15:41,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:41,360 INFO L225 Difference]: With dead ends: 477 [2019-09-08 06:15:41,360 INFO L226 Difference]: Without dead ends: 321 [2019-09-08 06:15:41,369 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1180 GetRequests, 1146 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 06:15:41,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2019-09-08 06:15:41,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 280. [2019-09-08 06:15:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2019-09-08 06:15:41,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 641 transitions. [2019-09-08 06:15:41,429 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 641 transitions. Word has length 1145 [2019-09-08 06:15:41,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:41,430 INFO L475 AbstractCegarLoop]: Abstraction has 280 states and 641 transitions. [2019-09-08 06:15:41,430 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 06:15:41,431 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 641 transitions. [2019-09-08 06:15:41,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 981 [2019-09-08 06:15:41,448 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:41,449 INFO L399 BasicCegarLoop]: trace histogram [73, 73, 70, 70, 58, 57, 36, 36, 36, 36, 36, 36, 36, 35, 35, 35, 35, 35, 35, 35, 22, 22, 16, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:41,450 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:41,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:41,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1873493698, now seen corresponding path program 4 times [2019-09-08 06:15:41,451 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:41,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:41,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:41,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:15:41,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:41,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 28321 backedges. 407 proven. 2584 refuted. 0 times theorem prover too weak. 25330 trivial. 0 not checked. [2019-09-08 06:15:42,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:42,306 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:15:42,321 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 [2019-09-08 06:15:42,537 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:15:42,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:15:42,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 1744 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-08 06:15:42,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 28321 backedges. 12907 proven. 710 refuted. 0 times theorem prover too weak. 14704 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (12)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:15:43,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:43,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 24 [2019-09-08 06:15:43,678 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-08 06:15:43,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-08 06:15:43,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2019-09-08 06:15:43,682 INFO L87 Difference]: Start difference. First operand 280 states and 641 transitions. Second operand 24 states. [2019-09-08 06:15:45,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:45,640 INFO L93 Difference]: Finished difference Result 676 states and 2231 transitions. [2019-09-08 06:15:45,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-09-08 06:15:45,640 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 980 [2019-09-08 06:15:45,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:45,650 INFO L225 Difference]: With dead ends: 676 [2019-09-08 06:15:45,650 INFO L226 Difference]: Without dead ends: 379 [2019-09-08 06:15:45,662 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1037 GetRequests, 976 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=550, Invalid=3356, Unknown=0, NotChecked=0, Total=3906 [2019-09-08 06:15:45,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2019-09-08 06:15:45,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 306. [2019-09-08 06:15:45,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2019-09-08 06:15:45,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 646 transitions. [2019-09-08 06:15:45,714 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 646 transitions. Word has length 980 [2019-09-08 06:15:45,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:45,714 INFO L475 AbstractCegarLoop]: Abstraction has 306 states and 646 transitions. [2019-09-08 06:15:45,715 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-08 06:15:45,715 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 646 transitions. [2019-09-08 06:15:45,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1553 [2019-09-08 06:15:45,752 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:45,753 INFO L399 BasicCegarLoop]: trace histogram [114, 114, 113, 113, 92, 91, 57, 57, 57, 57, 57, 57, 57, 56, 56, 56, 56, 56, 56, 56, 36, 34, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:45,754 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:45,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:45,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1460206110, now seen corresponding path program 5 times [2019-09-08 06:15:45,755 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:45,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:45,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:45,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:15:45,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 71901 backedges. 1150 proven. 5457 refuted. 0 times theorem prover too weak. 65294 trivial. 0 not checked. [2019-09-08 06:15:47,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:47,800 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 [2019-09-08 06:15:47,812 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:15:48,254 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2019-09-08 06:15:48,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:15:48,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 1424 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-08 06:15:48,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 71901 backedges. 38866 proven. 865 refuted. 0 times theorem prover too weak. 32170 trivial. 0 not checked. [2019-09-08 06:15:49,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:49,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 24 [2019-09-08 06:15:49,278 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-08 06:15:49,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-08 06:15:49,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2019-09-08 06:15:49,279 INFO L87 Difference]: Start difference. First operand 306 states and 646 transitions. Second operand 24 states. [2019-09-08 06:15:50,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:50,752 INFO L93 Difference]: Finished difference Result 591 states and 1479 transitions. [2019-09-08 06:15:50,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-09-08 06:15:50,752 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1552 [2019-09-08 06:15:50,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:50,766 INFO L225 Difference]: With dead ends: 591 [2019-09-08 06:15:50,767 INFO L226 Difference]: Without dead ends: 296 [2019-09-08 06:15:50,777 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1602 GetRequests, 1552 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=376, Invalid=2276, Unknown=0, NotChecked=0, Total=2652 [2019-09-08 06:15:50,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2019-09-08 06:15:50,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 246. [2019-09-08 06:15:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2019-09-08 06:15:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 377 transitions. [2019-09-08 06:15:50,813 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 377 transitions. Word has length 1552 [2019-09-08 06:15:50,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:50,815 INFO L475 AbstractCegarLoop]: Abstraction has 246 states and 377 transitions. [2019-09-08 06:15:50,815 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-08 06:15:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 377 transitions. [2019-09-08 06:15:50,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1155 [2019-09-08 06:15:50,842 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:50,842 INFO L399 BasicCegarLoop]: trace histogram [84, 84, 83, 83, 77, 68, 42, 42, 42, 42, 42, 42, 42, 41, 41, 41, 41, 41, 41, 41, 35, 27, 16, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:50,843 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:50,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:50,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1197679856, now seen corresponding path program 6 times [2019-09-08 06:15:50,844 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:50,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:50,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:50,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:15:50,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 39484 backedges. 2749 proven. 3293 refuted. 0 times theorem prover too weak. 33442 trivial. 0 not checked. [2019-09-08 06:15:52,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:52,269 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-08 06:15:52,281 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:15:52,375 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-09-08 06:15:52,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:15:52,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:15:52,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:52,934 INFO L134 CoverageAnalysis]: Checked inductivity of 39484 backedges. 7324 proven. 4 refuted. 0 times theorem prover too weak. 32156 trivial. 0 not checked. [2019-09-08 06:15:52,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:52,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 9] total 27 [2019-09-08 06:15:52,941 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-08 06:15:52,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-08 06:15:52,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2019-09-08 06:15:52,942 INFO L87 Difference]: Start difference. First operand 246 states and 377 transitions. Second operand 27 states. [2019-09-08 06:15:54,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:54,864 INFO L93 Difference]: Finished difference Result 515 states and 895 transitions. [2019-09-08 06:15:54,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-09-08 06:15:54,865 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 1154 [2019-09-08 06:15:54,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:54,870 INFO L225 Difference]: With dead ends: 515 [2019-09-08 06:15:54,870 INFO L226 Difference]: Without dead ends: 277 [2019-09-08 06:15:54,874 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1224 GetRequests, 1159 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=576, Invalid=3846, Unknown=0, NotChecked=0, Total=4422 [2019-09-08 06:15:54,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2019-09-08 06:15:54,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 244. [2019-09-08 06:15:54,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2019-09-08 06:15:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 349 transitions. [2019-09-08 06:15:54,893 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 349 transitions. Word has length 1154 [2019-09-08 06:15:54,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:54,893 INFO L475 AbstractCegarLoop]: Abstraction has 244 states and 349 transitions. [2019-09-08 06:15:54,893 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-08 06:15:54,894 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 349 transitions. [2019-09-08 06:15:54,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1417 [2019-09-08 06:15:54,913 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:54,914 INFO L399 BasicCegarLoop]: trace histogram [106, 106, 101, 101, 84, 83, 53, 53, 53, 53, 53, 53, 53, 50, 50, 50, 50, 50, 50, 50, 34, 30, 22, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:54,914 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:54,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:54,915 INFO L82 PathProgramCache]: Analyzing trace with hash -185476162, now seen corresponding path program 7 times [2019-09-08 06:15:54,915 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:54,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:54,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:54,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:15:54,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 59761 backedges. 1606 proven. 4621 refuted. 0 times theorem prover too weak. 53534 trivial. 0 not checked. [2019-09-08 06:15:56,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:56,233 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 [2019-09-08 06:15:56,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:15:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:56,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 3145 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-08 06:15:56,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 59761 backedges. 606 proven. 4918 refuted. 0 times theorem prover too weak. 54237 trivial. 0 not checked. [2019-09-08 06:15:57,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:57,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 29 [2019-09-08 06:15:57,691 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-08 06:15:57,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-08 06:15:57,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2019-09-08 06:15:57,691 INFO L87 Difference]: Start difference. First operand 244 states and 349 transitions. Second operand 29 states. [2019-09-08 06:16:00,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:16:00,103 INFO L93 Difference]: Finished difference Result 642 states and 1087 transitions. [2019-09-08 06:16:00,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-09-08 06:16:00,104 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 1416 [2019-09-08 06:16:00,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:16:00,111 INFO L225 Difference]: With dead ends: 642 [2019-09-08 06:16:00,111 INFO L226 Difference]: Without dead ends: 401 [2019-09-08 06:16:00,116 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1488 GetRequests, 1413 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=725, Invalid=5127, Unknown=0, NotChecked=0, Total=5852 [2019-09-08 06:16:00,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2019-09-08 06:16:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 304. [2019-09-08 06:16:00,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2019-09-08 06:16:00,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 447 transitions. [2019-09-08 06:16:00,147 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 447 transitions. Word has length 1416 [2019-09-08 06:16:00,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:16:00,149 INFO L475 AbstractCegarLoop]: Abstraction has 304 states and 447 transitions. [2019-09-08 06:16:00,150 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-08 06:16:00,150 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 447 transitions. [2019-09-08 06:16:00,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2207 [2019-09-08 06:16:00,226 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:16:00,227 INFO L399 BasicCegarLoop]: trace histogram [166, 166, 157, 157, 131, 130, 83, 83, 83, 83, 83, 83, 83, 78, 78, 78, 78, 78, 78, 78, 52, 48, 36, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:16:00,227 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:16:00,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:16:00,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1520239468, now seen corresponding path program 8 times [2019-09-08 06:16:00,228 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:16:00,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:16:00,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:00,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:16:00,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:16:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 146288 backedges. 1457 proven. 6417 refuted. 0 times theorem prover too weak. 138414 trivial. 0 not checked. [2019-09-08 06:16:02,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:16:02,860 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 [2019-09-08 06:16:02,872 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:16:03,474 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:16:03,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:16:03,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 4899 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-08 06:16:03,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:16:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 146288 backedges. 955 proven. 8683 refuted. 0 times theorem prover too weak. 136650 trivial. 0 not checked. [2019-09-08 06:16:05,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:16:05,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 20 [2019-09-08 06:16:05,392 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-08 06:16:05,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-08 06:16:05,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2019-09-08 06:16:05,393 INFO L87 Difference]: Start difference. First operand 304 states and 447 transitions. Second operand 20 states. [2019-09-08 06:16:05,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:16:05,905 INFO L93 Difference]: Finished difference Result 342 states and 573 transitions. [2019-09-08 06:16:05,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-08 06:16:05,906 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 2206 [2019-09-08 06:16:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:16:05,916 INFO L225 Difference]: With dead ends: 342 [2019-09-08 06:16:05,916 INFO L226 Difference]: Without dead ends: 338 [2019-09-08 06:16:05,918 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2241 GetRequests, 2208 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=946, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 06:16:05,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2019-09-08 06:16:05,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 327. [2019-09-08 06:16:05,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2019-09-08 06:16:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 517 transitions. [2019-09-08 06:16:05,944 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 517 transitions. Word has length 2206 [2019-09-08 06:16:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:16:05,945 INFO L475 AbstractCegarLoop]: Abstraction has 327 states and 517 transitions. [2019-09-08 06:16:05,945 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-08 06:16:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 517 transitions. [2019-09-08 06:16:06,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4100 [2019-09-08 06:16:06,134 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:16:06,136 INFO L399 BasicCegarLoop]: trace histogram [301, 301, 300, 300, 244, 242, 150, 150, 150, 150, 150, 150, 150, 150, 150, 150, 150, 150, 150, 150, 94, 92, 58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:16:06,137 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:16:06,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:16:06,141 INFO L82 PathProgramCache]: Analyzing trace with hash -508925, now seen corresponding path program 9 times [2019-09-08 06:16:06,142 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:16:06,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:16:06,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:06,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:16:06,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:16:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 508207 backedges. 2072 proven. 16186 refuted. 0 times theorem prover too weak. 489949 trivial. 0 not checked. [2019-09-08 06:16:14,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:16:14,870 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 [2019-09-08 06:16:14,882 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:16:15,348 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2019-09-08 06:16:15,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:16:15,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 1576 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-08 06:16:15,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:16:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 508207 backedges. 1987 proven. 17950 refuted. 0 times theorem prover too weak. 488270 trivial. 0 not checked. [2019-09-08 06:16:21,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:16:21,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 20 [2019-09-08 06:16:21,776 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-08 06:16:21,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-08 06:16:21,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2019-09-08 06:16:21,777 INFO L87 Difference]: Start difference. First operand 327 states and 517 transitions. Second operand 20 states. [2019-09-08 06:16:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:16:22,228 INFO L93 Difference]: Finished difference Result 367 states and 660 transitions. [2019-09-08 06:16:22,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-08 06:16:22,228 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 4099 [2019-09-08 06:16:22,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:16:22,245 INFO L225 Difference]: With dead ends: 367 [2019-09-08 06:16:22,246 INFO L226 Difference]: Without dead ends: 363 [2019-09-08 06:16:22,248 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4138 GetRequests, 4105 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=946, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 06:16:22,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2019-09-08 06:16:22,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 337. [2019-09-08 06:16:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2019-09-08 06:16:22,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 541 transitions. [2019-09-08 06:16:22,287 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 541 transitions. Word has length 4099 [2019-09-08 06:16:22,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:16:22,288 INFO L475 AbstractCegarLoop]: Abstraction has 337 states and 541 transitions. [2019-09-08 06:16:22,288 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-08 06:16:22,289 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 541 transitions. [2019-09-08 06:16:22,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4413 [2019-09-08 06:16:22,563 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:16:22,565 INFO L399 BasicCegarLoop]: trace histogram [326, 326, 321, 321, 263, 260, 163, 163, 163, 163, 163, 163, 163, 160, 160, 160, 160, 160, 160, 160, 100, 100, 66, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:16:22,566 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:16:22,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:16:22,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1408512794, now seen corresponding path program 10 times [2019-09-08 06:16:22,568 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:16:22,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:16:22,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:22,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:16:22,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:16:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 589155 backedges. 2441 proven. 17231 refuted. 0 times theorem prover too weak. 569483 trivial. 0 not checked. [2019-09-08 06:16:34,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:16:34,602 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 [2019-09-08 06:16:34,620 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:16:35,686 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:16:35,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:16:35,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 7852 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-08 06:16:35,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:16:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 589155 backedges. 65488 proven. 382 refuted. 0 times theorem prover too weak. 523285 trivial. 0 not checked. [2019-09-08 06:16:45,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:16:45,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2019-09-08 06:16:45,625 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-08 06:16:45,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-08 06:16:45,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2019-09-08 06:16:45,627 INFO L87 Difference]: Start difference. First operand 337 states and 541 transitions. Second operand 25 states. [2019-09-08 06:16:47,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:16:47,990 INFO L93 Difference]: Finished difference Result 687 states and 1271 transitions. [2019-09-08 06:16:47,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-08 06:16:47,990 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 4412 [2019-09-08 06:16:47,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:16:47,998 INFO L225 Difference]: With dead ends: 687 [2019-09-08 06:16:47,998 INFO L226 Difference]: Without dead ends: 378 [2019-09-08 06:16:48,004 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4484 GetRequests, 4413 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=711, Invalid=4545, Unknown=0, NotChecked=0, Total=5256 [2019-09-08 06:16:48,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2019-09-08 06:16:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 341. [2019-09-08 06:16:48,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2019-09-08 06:16:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 556 transitions. [2019-09-08 06:16:48,039 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 556 transitions. Word has length 4412 [2019-09-08 06:16:48,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:16:48,041 INFO L475 AbstractCegarLoop]: Abstraction has 341 states and 556 transitions. [2019-09-08 06:16:48,041 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-08 06:16:48,041 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 556 transitions. [2019-09-08 06:16:48,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5285 [2019-09-08 06:16:48,292 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:16:48,294 INFO L399 BasicCegarLoop]: trace histogram [388, 388, 387, 387, 315, 312, 194, 194, 194, 194, 194, 194, 194, 193, 193, 193, 193, 193, 193, 193, 121, 119, 76, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:16:48,294 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:16:48,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:16:48,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1158155792, now seen corresponding path program 11 times [2019-09-08 06:16:48,296 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:16:48,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:16:48,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:48,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:16:48,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:17:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 846043 backedges. 3291 proven. 18161 refuted. 0 times theorem prover too weak. 824591 trivial. 0 not checked. [2019-09-08 06:17:04,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:17:04,116 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 [2019-09-08 06:17:04,129 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:17:07,313 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 168 check-sat command(s) [2019-09-08 06:17:07,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:17:07,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 6217 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-08 06:17:07,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:17:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 846043 backedges. 420643 proven. 5739 refuted. 0 times theorem prover too weak. 419661 trivial. 0 not checked. [2019-09-08 06:17:21,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:17:21,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24] total 34 [2019-09-08 06:17:21,554 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-08 06:17:21,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-08 06:17:21,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 06:17:21,555 INFO L87 Difference]: Start difference. First operand 341 states and 556 transitions. Second operand 34 states. [2019-09-08 06:17:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:17:25,486 INFO L93 Difference]: Finished difference Result 990 states and 2080 transitions. [2019-09-08 06:17:25,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-09-08 06:17:25,487 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 5284 [2019-09-08 06:17:25,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:17:25,500 INFO L225 Difference]: With dead ends: 990 [2019-09-08 06:17:25,501 INFO L226 Difference]: Without dead ends: 644 [2019-09-08 06:17:25,513 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5380 GetRequests, 5274 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3705 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1197, Invalid=10359, Unknown=0, NotChecked=0, Total=11556 [2019-09-08 06:17:25,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2019-09-08 06:17:25,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 347. [2019-09-08 06:17:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2019-09-08 06:17:25,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 556 transitions. [2019-09-08 06:17:25,558 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 556 transitions. Word has length 5284 [2019-09-08 06:17:25,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:17:25,559 INFO L475 AbstractCegarLoop]: Abstraction has 347 states and 556 transitions. [2019-09-08 06:17:25,560 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-08 06:17:25,560 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 556 transitions. [2019-09-08 06:17:25,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4849 [2019-09-08 06:17:25,800 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:17:25,802 INFO L399 BasicCegarLoop]: trace histogram [357, 357, 354, 354, 288, 287, 178, 178, 178, 178, 178, 178, 178, 177, 177, 177, 177, 177, 177, 177, 111, 109, 69, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:17:25,802 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:17:25,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:17:25,803 INFO L82 PathProgramCache]: Analyzing trace with hash -503596406, now seen corresponding path program 12 times [2019-09-08 06:17:25,804 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:17:25,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:17:25,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:25,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:17:25,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:17:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 711793 backedges. 6191 proven. 15474 refuted. 0 times theorem prover too weak. 690128 trivial. 0 not checked. [2019-09-08 06:17:40,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:17:40,442 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:17:40,455 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:17:40,878 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2019-09-08 06:17:40,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:17:40,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 1300 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-08 06:17:40,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:17:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 711793 backedges. 3864 proven. 19795 refuted. 0 times theorem prover too weak. 688134 trivial. 0 not checked. [2019-09-08 06:17:49,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:17:49,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2019-09-08 06:17:49,128 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-08 06:17:49,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-08 06:17:49,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2019-09-08 06:17:49,129 INFO L87 Difference]: Start difference. First operand 347 states and 556 transitions. Second operand 28 states. [2019-09-08 06:17:49,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:17:49,855 INFO L93 Difference]: Finished difference Result 379 states and 682 transitions. [2019-09-08 06:17:49,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-08 06:17:49,856 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 4848 [2019-09-08 06:17:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:17:49,868 INFO L225 Difference]: With dead ends: 379 [2019-09-08 06:17:49,868 INFO L226 Difference]: Without dead ends: 375 [2019-09-08 06:17:49,870 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4895 GetRequests, 4846 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=508, Invalid=2042, Unknown=0, NotChecked=0, Total=2550 [2019-09-08 06:17:49,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2019-09-08 06:17:49,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 367. [2019-09-08 06:17:49,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2019-09-08 06:17:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 630 transitions. [2019-09-08 06:17:49,900 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 630 transitions. Word has length 4848 [2019-09-08 06:17:49,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:17:49,901 INFO L475 AbstractCegarLoop]: Abstraction has 367 states and 630 transitions. [2019-09-08 06:17:49,901 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-08 06:17:49,902 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 630 transitions. [2019-09-08 06:17:50,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10351 [2019-09-08 06:17:50,472 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:17:50,475 INFO L399 BasicCegarLoop]: trace histogram [763, 763, 756, 756, 619, 610, 381, 381, 381, 381, 381, 381, 381, 378, 378, 378, 378, 378, 378, 378, 241, 229, 146, 144, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:17:50,475 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:17:50,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:17:50,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1042272698, now seen corresponding path program 13 times [2019-09-08 06:17:50,477 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:17:50,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:17:50,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:50,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:17:50,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3255960 backedges. 11547 proven. 30757 refuted. 0 times theorem prover too weak. 3213656 trivial. 0 not checked. [2019-09-08 06:18:35,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:35,262 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 [2019-09-08 06:18:35,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:18:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:38,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 22981 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-08 06:18:38,411 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:19:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3255960 backedges. 5386 proven. 54304 refuted. 0 times theorem prover too weak. 3196270 trivial. 0 not checked. [2019-09-08 06:19:11,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:19:11,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 26 [2019-09-08 06:19:11,501 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-08 06:19:11,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-08 06:19:11,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2019-09-08 06:19:11,502 INFO L87 Difference]: Start difference. First operand 367 states and 630 transitions. Second operand 26 states. [2019-09-08 06:19:12,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:19:12,083 INFO L93 Difference]: Finished difference Result 425 states and 905 transitions. [2019-09-08 06:19:12,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-08 06:19:12,087 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 10350 [2019-09-08 06:19:12,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:19:12,107 INFO L225 Difference]: With dead ends: 425 [2019-09-08 06:19:12,107 INFO L226 Difference]: Without dead ends: 421 [2019-09-08 06:19:12,109 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10393 GetRequests, 10348 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=433, Invalid=1729, Unknown=0, NotChecked=0, Total=2162 [2019-09-08 06:19:12,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2019-09-08 06:19:12,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 380. [2019-09-08 06:19:12,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2019-09-08 06:19:12,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 673 transitions. [2019-09-08 06:19:12,150 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 673 transitions. Word has length 10350 [2019-09-08 06:19:12,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:19:12,153 INFO L475 AbstractCegarLoop]: Abstraction has 380 states and 673 transitions. [2019-09-08 06:19:12,153 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-08 06:19:12,153 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 673 transitions. [2019-09-08 06:19:13,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13020 [2019-09-08 06:19:13,507 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:19:13,511 INFO L399 BasicCegarLoop]: trace histogram [965, 965, 946, 946, 775, 771, 482, 482, 482, 482, 482, 482, 482, 473, 473, 473, 473, 473, 473, 473, 302, 289, 190, 175, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:19:13,512 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:19:13,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:19:13,514 INFO L82 PathProgramCache]: Analyzing trace with hash 946956856, now seen corresponding path program 14 times [2019-09-08 06:19:13,514 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:19:13,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:19:13,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:13,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:19:13,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5155416 backedges. 17157 proven. 73518 refuted. 0 times theorem prover too weak. 5064741 trivial. 0 not checked. [2019-09-08 06:20:27,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:27,713 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 [2019-09-08 06:20:27,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:20:31,752 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:20:31,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:20:31,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 28907 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-08 06:20:31,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:21:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5155416 backedges. 8254 proven. 61544 refuted. 0 times theorem prover too weak. 5085618 trivial. 0 not checked. [2019-09-08 06:21:25,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:21:25,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18] total 33 [2019-09-08 06:21:25,234 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-08 06:21:25,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-08 06:21:25,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2019-09-08 06:21:25,235 INFO L87 Difference]: Start difference. First operand 380 states and 673 transitions. Second operand 33 states. [2019-09-08 06:21:28,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:21:28,426 INFO L93 Difference]: Finished difference Result 985 states and 2215 transitions. [2019-09-08 06:21:28,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-09-08 06:21:28,427 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 13019 [2019-09-08 06:21:28,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:21:28,441 INFO L225 Difference]: With dead ends: 985 [2019-09-08 06:21:28,441 INFO L226 Difference]: Without dead ends: 626 [2019-09-08 06:21:28,450 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 13120 GetRequests, 13022 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1132, Invalid=8768, Unknown=0, NotChecked=0, Total=9900 [2019-09-08 06:21:28,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-09-08 06:21:28,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 484. [2019-09-08 06:21:28,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2019-09-08 06:21:28,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 864 transitions. [2019-09-08 06:21:28,496 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 864 transitions. Word has length 13019 [2019-09-08 06:21:28,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:21:28,498 INFO L475 AbstractCegarLoop]: Abstraction has 484 states and 864 transitions. [2019-09-08 06:21:28,498 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-08 06:21:28,499 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 864 transitions. [2019-09-08 06:21:32,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22797 [2019-09-08 06:21:32,215 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:21:32,221 INFO L399 BasicCegarLoop]: trace histogram [1689, 1689, 1658, 1658, 1358, 1349, 844, 844, 844, 844, 844, 844, 844, 829, 829, 829, 829, 829, 829, 829, 529, 505, 331, 309, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:21:32,221 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:21:32,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:21:32,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1459918956, now seen corresponding path program 15 times [2019-09-08 06:21:32,224 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:21:32,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:21:32,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:32,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:21:32,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:22:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 15823113 backedges. 15649 proven. 126624 refuted. 0 times theorem prover too weak. 15680840 trivial. 0 not checked. [2019-09-08 06:25:43,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:43,370 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:25:43,382 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:25:44,931 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2019-09-08 06:25:44,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:25:44,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 2331 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-08 06:25:45,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:28:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 15823113 backedges. 484093 proven. 507 refuted. 0 times theorem prover too weak. 15338513 trivial. 0 not checked. [2019-09-08 06:28:23,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:28:23,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 26 [2019-09-08 06:28:23,692 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-08 06:28:23,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-08 06:28:23,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2019-09-08 06:28:23,693 INFO L87 Difference]: Start difference. First operand 484 states and 864 transitions. Second operand 26 states. [2019-09-08 06:28:25,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:28:25,321 INFO L93 Difference]: Finished difference Result 1060 states and 2003 transitions. [2019-09-08 06:28:25,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-08 06:28:25,322 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 22796 [2019-09-08 06:28:25,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:28:25,337 INFO L225 Difference]: With dead ends: 1060 [2019-09-08 06:28:25,338 INFO L226 Difference]: Without dead ends: 606 [2019-09-08 06:28:25,345 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 22852 GetRequests, 22798 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=409, Invalid=2671, Unknown=0, NotChecked=0, Total=3080 [2019-09-08 06:28:25,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2019-09-08 06:28:25,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 505. [2019-09-08 06:28:25,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2019-09-08 06:28:25,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 887 transitions. [2019-09-08 06:28:25,392 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 887 transitions. Word has length 22796 [2019-09-08 06:28:25,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:28:25,394 INFO L475 AbstractCegarLoop]: Abstraction has 505 states and 887 transitions. [2019-09-08 06:28:25,394 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-08 06:28:25,394 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 887 transitions. [2019-09-08 06:28:27,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19856 [2019-09-08 06:28:27,381 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:28:27,382 INFO L399 BasicCegarLoop]: trace histogram [1467, 1467, 1448, 1448, 1180, 1178, 733, 733, 733, 733, 733, 733, 733, 724, 724, 724, 724, 724, 724, 724, 456, 445, 287, 270, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:28:27,383 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:28:27,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:28:27,384 INFO L82 PathProgramCache]: Analyzing trace with hash -303046766, now seen corresponding path program 16 times [2019-09-08 06:28:27,384 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:28:27,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:28:27,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:27,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:28:27,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat