java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_true-unreach-call4_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 22:43:51,796 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 22:43:51,798 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 22:43:51,810 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 22:43:51,810 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 22:43:51,811 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 22:43:51,812 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 22:43:51,814 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 22:43:51,816 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 22:43:51,816 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 22:43:51,817 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 22:43:51,818 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 22:43:51,819 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 22:43:51,820 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 22:43:51,821 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 22:43:51,821 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 22:43:51,822 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 22:43:51,824 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 22:43:51,826 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 22:43:51,828 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 22:43:51,829 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 22:43:51,830 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 22:43:51,832 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-06 22:43:51,841 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-11-06 22:43:51,866 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 22:43:51,866 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 22:43:51,867 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 22:43:51,867 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 22:43:51,867 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 22:43:51,868 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 22:43:51,868 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 22:43:51,868 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 22:43:51,868 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 22:43:51,868 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 22:43:51,868 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 22:43:51,869 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 22:43:51,870 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 22:43:51,870 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 22:43:51,870 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 22:43:51,870 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 22:43:51,870 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 22:43:51,871 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 22:43:51,871 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 22:43:51,871 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:43:51,871 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 22:43:51,871 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 22:43:51,873 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 22:43:51,873 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 22:43:51,873 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 22:43:51,873 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 22:43:51,874 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 22:43:51,874 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 22:43:51,923 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 22:43:51,938 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 22:43:51,942 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 22:43:51,944 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 22:43:51,944 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 22:43:51,945 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_true-unreach-call4_true-termination.i [2018-11-06 22:43:51,998 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbbfdeb4c/2439fe2a9f9549be812deca97d752a97/FLAG9b764013a [2018-11-06 22:43:52,432 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 22:43:52,433 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_true-unreach-call4_true-termination.i [2018-11-06 22:43:52,441 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbbfdeb4c/2439fe2a9f9549be812deca97d752a97/FLAG9b764013a [2018-11-06 22:43:52,460 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbbfdeb4c/2439fe2a9f9549be812deca97d752a97 [2018-11-06 22:43:52,472 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 22:43:52,474 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 22:43:52,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 22:43:52,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 22:43:52,482 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 22:43:52,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:43:52" (1/1) ... [2018-11-06 22:43:52,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@516bc9a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52, skipping insertion in model container [2018-11-06 22:43:52,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:43:52" (1/1) ... [2018-11-06 22:43:52,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 22:43:52,525 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 22:43:52,753 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:43:52,757 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 22:43:52,777 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:43:52,798 INFO L193 MainTranslator]: Completed translation [2018-11-06 22:43:52,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52 WrapperNode [2018-11-06 22:43:52,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 22:43:52,799 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 22:43:52,800 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 22:43:52,800 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 22:43:52,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2018-11-06 22:43:52,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2018-11-06 22:43:52,838 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 22:43:52,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 22:43:52,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 22:43:52,839 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 22:43:52,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2018-11-06 22:43:52,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2018-11-06 22:43:52,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2018-11-06 22:43:52,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2018-11-06 22:43:52,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2018-11-06 22:43:52,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2018-11-06 22:43:52,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2018-11-06 22:43:52,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 22:43:52,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 22:43:52,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 22:43:52,863 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 22:43:52,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (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 [2018-11-06 22:43:52,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-06 22:43:52,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-06 22:43:52,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 22:43:52,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 22:43:52,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-06 22:43:52,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-06 22:43:53,487 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 22:43:53,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:43:53 BoogieIcfgContainer [2018-11-06 22:43:53,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 22:43:53,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 22:43:53,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 22:43:53,496 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 22:43:53,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:43:52" (1/3) ... [2018-11-06 22:43:53,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5acb1767 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:43:53, skipping insertion in model container [2018-11-06 22:43:53,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (2/3) ... [2018-11-06 22:43:53,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5acb1767 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:43:53, skipping insertion in model container [2018-11-06 22:43:53,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:43:53" (3/3) ... [2018-11-06 22:43:53,501 INFO L112 eAbstractionObserver]: Analyzing ICFG array_true-unreach-call4_true-termination.i [2018-11-06 22:43:53,510 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 22:43:53,518 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 22:43:53,533 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 22:43:53,565 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 22:43:53,565 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 22:43:53,566 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 22:43:53,566 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 22:43:53,566 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 22:43:53,566 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 22:43:53,566 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 22:43:53,566 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 22:43:53,567 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 22:43:53,582 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2018-11-06 22:43:53,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-06 22:43:53,589 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:53,590 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:53,592 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:53,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:53,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1590274356, now seen corresponding path program 1 times [2018-11-06 22:43:53,601 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:53,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:53,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:53,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:53,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:53,718 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:43:53,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 22:43:53,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-06 22:43:53,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-06 22:43:53,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:43:53,736 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2018-11-06 22:43:53,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:53,753 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2018-11-06 22:43:53,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-06 22:43:53,755 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-11-06 22:43:53,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:53,764 INFO L225 Difference]: With dead ends: 41 [2018-11-06 22:43:53,764 INFO L226 Difference]: Without dead ends: 19 [2018-11-06 22:43:53,767 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:43:53,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-06 22:43:53,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-06 22:43:53,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-06 22:43:53,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-11-06 22:43:53,803 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 11 [2018-11-06 22:43:53,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:53,803 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-11-06 22:43:53,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-06 22:43:53,804 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-11-06 22:43:53,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-06 22:43:53,804 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:53,805 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:53,805 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:53,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:53,806 INFO L82 PathProgramCache]: Analyzing trace with hash -504367117, now seen corresponding path program 1 times [2018-11-06 22:43:53,806 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:53,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:53,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:53,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:53,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:53,866 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:43:53,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 22:43:53,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 22:43:53,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 22:43:53,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:43:53,868 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 3 states. [2018-11-06 22:43:53,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:53,953 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-11-06 22:43:53,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 22:43:53,954 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-11-06 22:43:53,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:53,955 INFO L225 Difference]: With dead ends: 42 [2018-11-06 22:43:53,955 INFO L226 Difference]: Without dead ends: 32 [2018-11-06 22:43:53,958 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:43:53,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-06 22:43:53,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 21. [2018-11-06 22:43:53,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-06 22:43:53,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-06 22:43:53,966 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2018-11-06 22:43:53,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:53,966 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-06 22:43:53,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 22:43:53,966 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-06 22:43:53,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-06 22:43:53,968 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:53,968 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:53,968 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:53,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:53,969 INFO L82 PathProgramCache]: Analyzing trace with hash -766317770, now seen corresponding path program 1 times [2018-11-06 22:43:53,969 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:53,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:53,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:53,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:53,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:54,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:54,138 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:54,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:54,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:54,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:54,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-11-06 22:43:54,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 22:43:54,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 22:43:54,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:43:54,244 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2018-11-06 22:43:54,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:54,383 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2018-11-06 22:43:54,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 22:43:54,385 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-11-06 22:43:54,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:54,387 INFO L225 Difference]: With dead ends: 55 [2018-11-06 22:43:54,387 INFO L226 Difference]: Without dead ends: 45 [2018-11-06 22:43:54,389 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:43:54,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-06 22:43:54,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-11-06 22:43:54,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-06 22:43:54,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-11-06 22:43:54,401 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2018-11-06 22:43:54,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:54,402 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-11-06 22:43:54,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 22:43:54,402 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-11-06 22:43:54,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-06 22:43:54,403 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:54,404 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:54,404 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:54,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:54,405 INFO L82 PathProgramCache]: Analyzing trace with hash -349926957, now seen corresponding path program 2 times [2018-11-06 22:43:54,405 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:54,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:54,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:54,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:54,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:54,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:54,653 INFO L225 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 [2018-11-06 22:43:54,670 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:43:54,706 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-11-06 22:43:54,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:54,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-06 22:43:54,793 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:43:54,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2018-11-06 22:43:54,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 22:43:54,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 22:43:54,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:43:54,796 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2018-11-06 22:43:55,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:55,051 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2018-11-06 22:43:55,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-06 22:43:55,052 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2018-11-06 22:43:55,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:55,053 INFO L225 Difference]: With dead ends: 62 [2018-11-06 22:43:55,053 INFO L226 Difference]: Without dead ends: 46 [2018-11-06 22:43:55,054 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:43:55,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-06 22:43:55,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2018-11-06 22:43:55,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-06 22:43:55,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-06 22:43:55,061 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 24 [2018-11-06 22:43:55,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:55,061 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-06 22:43:55,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 22:43:55,062 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-06 22:43:55,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-06 22:43:55,063 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:55,063 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:55,063 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:55,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:55,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1151478113, now seen corresponding path program 1 times [2018-11-06 22:43:55,064 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:55,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:55,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:55,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:55,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:55,169 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-06 22:43:55,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:55,169 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:55,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:55,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-06 22:43:55,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:55,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-11-06 22:43:55,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 22:43:55,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 22:43:55,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:43:55,252 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 7 states. [2018-11-06 22:43:55,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:55,359 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-11-06 22:43:55,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-06 22:43:55,361 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2018-11-06 22:43:55,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:55,362 INFO L225 Difference]: With dead ends: 80 [2018-11-06 22:43:55,363 INFO L226 Difference]: Without dead ends: 59 [2018-11-06 22:43:55,363 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:43:55,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-06 22:43:55,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2018-11-06 22:43:55,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-06 22:43:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-11-06 22:43:55,370 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 41 [2018-11-06 22:43:55,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:55,370 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-11-06 22:43:55,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 22:43:55,371 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-11-06 22:43:55,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-06 22:43:55,372 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:55,372 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:55,372 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:55,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:55,373 INFO L82 PathProgramCache]: Analyzing trace with hash 242217340, now seen corresponding path program 2 times [2018-11-06 22:43:55,373 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:55,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:55,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:55,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:55,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-06 22:43:55,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:55,522 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:55,537 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:43:55,571 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:43:55,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:55,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-06 22:43:55,612 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:55,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-06 22:43:55,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-06 22:43:55,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-06 22:43:55,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:43:55,614 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 8 states. [2018-11-06 22:43:55,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:55,990 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-11-06 22:43:55,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 22:43:55,991 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2018-11-06 22:43:55,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:55,992 INFO L225 Difference]: With dead ends: 93 [2018-11-06 22:43:55,992 INFO L226 Difference]: Without dead ends: 72 [2018-11-06 22:43:55,996 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:43:55,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-06 22:43:56,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 52. [2018-11-06 22:43:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-06 22:43:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-11-06 22:43:56,009 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2018-11-06 22:43:56,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:56,009 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-11-06 22:43:56,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-06 22:43:56,011 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-11-06 22:43:56,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-11-06 22:43:56,012 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:56,012 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:56,018 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:56,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:56,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1380116289, now seen corresponding path program 3 times [2018-11-06 22:43:56,019 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:56,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:56,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:56,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:56,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-06 22:43:56,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:56,212 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:56,220 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:43:56,289 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-06 22:43:56,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:56,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-11-06 22:43:56,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:56,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2018-11-06 22:43:56,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 22:43:56,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 22:43:56,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:43:56,357 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 10 states. [2018-11-06 22:43:56,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:56,843 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2018-11-06 22:43:56,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-06 22:43:56,843 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2018-11-06 22:43:56,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:56,844 INFO L225 Difference]: With dead ends: 100 [2018-11-06 22:43:56,844 INFO L226 Difference]: Without dead ends: 73 [2018-11-06 22:43:56,845 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:43:56,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-11-06 22:43:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2018-11-06 22:43:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-06 22:43:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-11-06 22:43:56,852 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 51 [2018-11-06 22:43:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:56,853 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-11-06 22:43:56,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 22:43:56,853 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-11-06 22:43:56,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-06 22:43:56,855 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:56,855 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:56,856 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:56,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:56,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1107723355, now seen corresponding path program 4 times [2018-11-06 22:43:56,856 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:56,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:56,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:56,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:56,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-06 22:43:57,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:57,044 INFO L225 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 [2018-11-06 22:43:57,053 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:43:57,114 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:43:57,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:57,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-06 22:43:57,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:57,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-06 22:43:57,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 22:43:57,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 22:43:57,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:43:57,201 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 10 states. [2018-11-06 22:43:57,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:57,349 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2018-11-06 22:43:57,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-06 22:43:57,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2018-11-06 22:43:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:57,351 INFO L225 Difference]: With dead ends: 119 [2018-11-06 22:43:57,352 INFO L226 Difference]: Without dead ends: 86 [2018-11-06 22:43:57,353 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:43:57,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-11-06 22:43:57,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2018-11-06 22:43:57,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-11-06 22:43:57,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-11-06 22:43:57,359 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 68 [2018-11-06 22:43:57,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:57,360 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-11-06 22:43:57,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 22:43:57,360 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-11-06 22:43:57,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-06 22:43:57,361 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:57,362 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:57,362 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:57,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:57,362 INFO L82 PathProgramCache]: Analyzing trace with hash 786071208, now seen corresponding path program 5 times [2018-11-06 22:43:57,362 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:57,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:57,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:57,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:57,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-06 22:43:57,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:57,665 INFO L225 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 [2018-11-06 22:43:57,673 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:43:57,715 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-11-06 22:43:57,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:57,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-06 22:43:57,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:57,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-06 22:43:57,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-06 22:43:57,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-06 22:43:57,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:43:57,768 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 11 states. [2018-11-06 22:43:57,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:57,917 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-11-06 22:43:57,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:43:57,918 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 73 [2018-11-06 22:43:57,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:57,919 INFO L225 Difference]: With dead ends: 132 [2018-11-06 22:43:57,920 INFO L226 Difference]: Without dead ends: 99 [2018-11-06 22:43:57,921 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:43:57,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-11-06 22:43:57,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2018-11-06 22:43:57,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-06 22:43:57,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-11-06 22:43:57,927 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 73 [2018-11-06 22:43:57,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:57,928 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-11-06 22:43:57,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-06 22:43:57,928 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-11-06 22:43:57,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-11-06 22:43:57,929 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:57,930 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:57,930 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:57,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:57,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1178723717, now seen corresponding path program 6 times [2018-11-06 22:43:57,931 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:57,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:57,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:57,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:57,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-06 22:43:58,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:58,124 INFO L225 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 [2018-11-06 22:43:58,135 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:43:58,292 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-11-06 22:43:58,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:58,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-06 22:43:58,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:58,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-06 22:43:58,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-06 22:43:58,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-06 22:43:58,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:43:58,444 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 12 states. [2018-11-06 22:43:58,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:58,609 INFO L93 Difference]: Finished difference Result 145 states and 147 transitions. [2018-11-06 22:43:58,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-06 22:43:58,610 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 78 [2018-11-06 22:43:58,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:58,611 INFO L225 Difference]: With dead ends: 145 [2018-11-06 22:43:58,612 INFO L226 Difference]: Without dead ends: 112 [2018-11-06 22:43:58,613 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:43:58,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-11-06 22:43:58,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 84. [2018-11-06 22:43:58,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-11-06 22:43:58,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-11-06 22:43:58,619 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 78 [2018-11-06 22:43:58,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:58,620 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-11-06 22:43:58,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-06 22:43:58,620 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-11-06 22:43:58,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-11-06 22:43:58,622 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:58,622 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:58,622 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:58,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:58,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1051279560, now seen corresponding path program 7 times [2018-11-06 22:43:58,623 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:58,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:58,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:58,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:58,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-06 22:43:58,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:58,851 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:58,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:58,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-06 22:43:58,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:58,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-06 22:43:58,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-06 22:43:58,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-06 22:43:58,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:43:58,961 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 13 states. [2018-11-06 22:43:59,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:59,199 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-11-06 22:43:59,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-06 22:43:59,200 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 83 [2018-11-06 22:43:59,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:59,201 INFO L225 Difference]: With dead ends: 158 [2018-11-06 22:43:59,201 INFO L226 Difference]: Without dead ends: 125 [2018-11-06 22:43:59,202 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:43:59,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-11-06 22:43:59,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 89. [2018-11-06 22:43:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-06 22:43:59,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-11-06 22:43:59,208 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 83 [2018-11-06 22:43:59,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:59,209 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-11-06 22:43:59,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-06 22:43:59,209 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-11-06 22:43:59,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-11-06 22:43:59,210 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:59,210 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:59,211 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:59,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:59,211 INFO L82 PathProgramCache]: Analyzing trace with hash 704083813, now seen corresponding path program 8 times [2018-11-06 22:43:59,211 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:59,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:59,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:59,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:59,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-06 22:43:59,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:59,405 INFO L225 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 [2018-11-06 22:43:59,414 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:43:59,442 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:43:59,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:59,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:59,488 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-06 22:43:59,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:59,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-06 22:43:59,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-06 22:43:59,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-06 22:43:59,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:43:59,509 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 14 states. [2018-11-06 22:43:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:59,645 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-11-06 22:43:59,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-06 22:43:59,646 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 88 [2018-11-06 22:43:59,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:59,647 INFO L225 Difference]: With dead ends: 171 [2018-11-06 22:43:59,647 INFO L226 Difference]: Without dead ends: 138 [2018-11-06 22:43:59,648 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:43:59,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-11-06 22:43:59,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2018-11-06 22:43:59,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-11-06 22:43:59,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-11-06 22:43:59,663 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 88 [2018-11-06 22:43:59,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:59,664 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-11-06 22:43:59,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-06 22:43:59,664 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-11-06 22:43:59,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-11-06 22:43:59,666 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:59,666 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:59,666 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:59,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:59,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1359207144, now seen corresponding path program 9 times [2018-11-06 22:43:59,667 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:59,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:59,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:59,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:59,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-06 22:43:59,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:59,970 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:59,981 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:44:00,023 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-06 22:44:00,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:00,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2018-11-06 22:44:00,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:00,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 16 [2018-11-06 22:44:00,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-06 22:44:00,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-06 22:44:00,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:44:00,111 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 16 states. [2018-11-06 22:44:00,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:00,356 INFO L93 Difference]: Finished difference Result 172 states and 180 transitions. [2018-11-06 22:44:00,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-06 22:44:00,357 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 93 [2018-11-06 22:44:00,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:00,358 INFO L225 Difference]: With dead ends: 172 [2018-11-06 22:44:00,358 INFO L226 Difference]: Without dead ends: 127 [2018-11-06 22:44:00,359 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:44:00,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-11-06 22:44:00,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-11-06 22:44:00,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-11-06 22:44:00,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-11-06 22:44:00,365 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 93 [2018-11-06 22:44:00,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:00,365 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-11-06 22:44:00,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-06 22:44:00,366 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-11-06 22:44:00,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-11-06 22:44:00,367 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:00,368 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:00,368 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:00,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:00,368 INFO L82 PathProgramCache]: Analyzing trace with hash -707194537, now seen corresponding path program 10 times [2018-11-06 22:44:00,368 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:00,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:00,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:00,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:00,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-11-06 22:44:01,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:01,606 INFO L225 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 [2018-11-06 22:44:01,614 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:44:01,791 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:44:01,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:01,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-11-06 22:44:01,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:01,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-11-06 22:44:01,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-06 22:44:01,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-06 22:44:01,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:44:01,857 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 16 states. [2018-11-06 22:44:02,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:02,054 INFO L93 Difference]: Finished difference Result 197 states and 199 transitions. [2018-11-06 22:44:02,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-06 22:44:02,056 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 122 [2018-11-06 22:44:02,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:02,057 INFO L225 Difference]: With dead ends: 197 [2018-11-06 22:44:02,057 INFO L226 Difference]: Without dead ends: 140 [2018-11-06 22:44:02,058 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:44:02,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-11-06 22:44:02,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2018-11-06 22:44:02,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-11-06 22:44:02,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2018-11-06 22:44:02,062 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 122 [2018-11-06 22:44:02,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:02,063 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2018-11-06 22:44:02,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-06 22:44:02,063 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2018-11-06 22:44:02,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-06 22:44:02,064 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:02,064 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:02,065 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:02,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:02,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1393109990, now seen corresponding path program 11 times [2018-11-06 22:44:02,065 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:02,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:02,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:02,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:02,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-11-06 22:44:02,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:02,282 INFO L225 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 [2018-11-06 22:44:02,292 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:44:02,430 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-11-06 22:44:02,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:02,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-11-06 22:44:02,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:02,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-11-06 22:44:02,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-06 22:44:02,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-06 22:44:02,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:44:02,486 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand 17 states. [2018-11-06 22:44:02,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:02,665 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2018-11-06 22:44:02,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-06 22:44:02,666 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 127 [2018-11-06 22:44:02,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:02,667 INFO L225 Difference]: With dead ends: 210 [2018-11-06 22:44:02,667 INFO L226 Difference]: Without dead ends: 153 [2018-11-06 22:44:02,668 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:44:02,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-11-06 22:44:02,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 133. [2018-11-06 22:44:02,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-11-06 22:44:02,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-11-06 22:44:02,673 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 127 [2018-11-06 22:44:02,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:02,673 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-11-06 22:44:02,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-06 22:44:02,673 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-11-06 22:44:02,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-11-06 22:44:02,674 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:02,675 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:02,675 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:02,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:02,675 INFO L82 PathProgramCache]: Analyzing trace with hash 417551159, now seen corresponding path program 12 times [2018-11-06 22:44:02,675 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:02,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:02,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:02,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:02,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-11-06 22:44:02,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:02,925 INFO L225 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 [2018-11-06 22:44:02,933 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:44:03,311 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-11-06 22:44:03,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:03,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-11-06 22:44:03,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:03,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-11-06 22:44:03,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-06 22:44:03,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-06 22:44:03,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:44:03,373 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 18 states. [2018-11-06 22:44:03,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:03,945 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2018-11-06 22:44:03,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-06 22:44:03,946 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 132 [2018-11-06 22:44:03,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:03,947 INFO L225 Difference]: With dead ends: 223 [2018-11-06 22:44:03,947 INFO L226 Difference]: Without dead ends: 166 [2018-11-06 22:44:03,950 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:44:03,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-11-06 22:44:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 138. [2018-11-06 22:44:03,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-11-06 22:44:03,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2018-11-06 22:44:03,954 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 132 [2018-11-06 22:44:03,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:03,955 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2018-11-06 22:44:03,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-06 22:44:03,955 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2018-11-06 22:44:03,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-11-06 22:44:03,957 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:03,957 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:03,958 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:03,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:03,958 INFO L82 PathProgramCache]: Analyzing trace with hash 694861370, now seen corresponding path program 13 times [2018-11-06 22:44:03,958 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:03,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:03,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:03,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:03,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-11-06 22:44:04,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:04,720 INFO L225 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 [2018-11-06 22:44:04,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:04,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:04,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-11-06 22:44:04,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:04,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-11-06 22:44:04,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-06 22:44:04,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-06 22:44:04,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:44:04,857 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 19 states. [2018-11-06 22:44:05,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:05,052 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-11-06 22:44:05,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-06 22:44:05,053 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 137 [2018-11-06 22:44:05,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:05,054 INFO L225 Difference]: With dead ends: 236 [2018-11-06 22:44:05,054 INFO L226 Difference]: Without dead ends: 179 [2018-11-06 22:44:05,055 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:44:05,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-11-06 22:44:05,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 143. [2018-11-06 22:44:05,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-11-06 22:44:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-11-06 22:44:05,059 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 137 [2018-11-06 22:44:05,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:05,060 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-11-06 22:44:05,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-06 22:44:05,060 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-11-06 22:44:05,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-11-06 22:44:05,061 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:05,061 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:05,062 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:05,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:05,062 INFO L82 PathProgramCache]: Analyzing trace with hash -252920553, now seen corresponding path program 14 times [2018-11-06 22:44:05,062 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:05,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:05,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:05,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:05,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-11-06 22:44:05,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:05,368 INFO L225 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 [2018-11-06 22:44:05,376 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:44:05,412 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:44:05,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:05,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-11-06 22:44:05,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:05,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-11-06 22:44:05,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-06 22:44:05,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-06 22:44:05,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:44:05,480 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 20 states. [2018-11-06 22:44:05,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:05,823 INFO L93 Difference]: Finished difference Result 249 states and 251 transitions. [2018-11-06 22:44:05,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-06 22:44:05,823 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 142 [2018-11-06 22:44:05,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:05,825 INFO L225 Difference]: With dead ends: 249 [2018-11-06 22:44:05,825 INFO L226 Difference]: Without dead ends: 192 [2018-11-06 22:44:05,826 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:44:05,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-11-06 22:44:05,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 148. [2018-11-06 22:44:05,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-11-06 22:44:05,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2018-11-06 22:44:05,831 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 142 [2018-11-06 22:44:05,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:05,831 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2018-11-06 22:44:05,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-06 22:44:05,832 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2018-11-06 22:44:05,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-11-06 22:44:05,833 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:05,833 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:05,833 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:05,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:05,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1709670310, now seen corresponding path program 15 times [2018-11-06 22:44:05,834 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:05,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:05,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:05,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:05,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-11-06 22:44:06,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:06,281 INFO L225 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 [2018-11-06 22:44:06,289 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:44:06,447 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-11-06 22:44:06,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:06,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-11-06 22:44:06,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:06,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 22 [2018-11-06 22:44:06,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-06 22:44:06,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-06 22:44:06,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:44:06,577 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 22 states. [2018-11-06 22:44:06,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:06,903 INFO L93 Difference]: Finished difference Result 250 states and 258 transitions. [2018-11-06 22:44:06,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-06 22:44:06,904 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 147 [2018-11-06 22:44:06,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:06,905 INFO L225 Difference]: With dead ends: 250 [2018-11-06 22:44:06,905 INFO L226 Difference]: Without dead ends: 181 [2018-11-06 22:44:06,905 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:44:06,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-11-06 22:44:06,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2018-11-06 22:44:06,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-11-06 22:44:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-11-06 22:44:06,910 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 147 [2018-11-06 22:44:06,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:06,911 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-11-06 22:44:06,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-06 22:44:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-11-06 22:44:06,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-11-06 22:44:06,912 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:06,912 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:06,912 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:06,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:06,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1031977225, now seen corresponding path program 16 times [2018-11-06 22:44:06,913 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:06,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:06,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:06,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:06,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2018-11-06 22:44:07,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:07,276 INFO L225 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 [2018-11-06 22:44:07,285 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:44:07,906 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:44:07,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:07,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2018-11-06 22:44:08,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:08,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-11-06 22:44:08,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-06 22:44:08,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-06 22:44:08,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:44:08,004 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 22 states. [2018-11-06 22:44:08,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:08,353 INFO L93 Difference]: Finished difference Result 275 states and 277 transitions. [2018-11-06 22:44:08,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-06 22:44:08,354 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 176 [2018-11-06 22:44:08,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:08,355 INFO L225 Difference]: With dead ends: 275 [2018-11-06 22:44:08,355 INFO L226 Difference]: Without dead ends: 194 [2018-11-06 22:44:08,356 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:44:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-11-06 22:44:08,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 182. [2018-11-06 22:44:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-11-06 22:44:08,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2018-11-06 22:44:08,360 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 176 [2018-11-06 22:44:08,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:08,360 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2018-11-06 22:44:08,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-06 22:44:08,360 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2018-11-06 22:44:08,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-11-06 22:44:08,361 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:08,362 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:08,362 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:08,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:08,362 INFO L82 PathProgramCache]: Analyzing trace with hash -524817524, now seen corresponding path program 17 times [2018-11-06 22:44:08,362 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:08,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:08,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:08,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:08,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:08,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1559 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2018-11-06 22:44:08,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:08,872 INFO L225 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 [2018-11-06 22:44:08,880 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:44:09,171 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-11-06 22:44:09,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:09,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1559 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2018-11-06 22:44:09,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:09,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-11-06 22:44:09,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-06 22:44:09,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-06 22:44:09,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:44:09,252 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 23 states. [2018-11-06 22:44:09,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:09,462 INFO L93 Difference]: Finished difference Result 288 states and 290 transitions. [2018-11-06 22:44:09,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-06 22:44:09,463 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 181 [2018-11-06 22:44:09,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:09,465 INFO L225 Difference]: With dead ends: 288 [2018-11-06 22:44:09,465 INFO L226 Difference]: Without dead ends: 207 [2018-11-06 22:44:09,465 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:44:09,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-11-06 22:44:09,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 187. [2018-11-06 22:44:09,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-11-06 22:44:09,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-11-06 22:44:09,470 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 181 [2018-11-06 22:44:09,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:09,470 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-11-06 22:44:09,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-06 22:44:09,470 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-11-06 22:44:09,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-11-06 22:44:09,471 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:09,471 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:09,472 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:09,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:09,472 INFO L82 PathProgramCache]: Analyzing trace with hash 679269097, now seen corresponding path program 18 times [2018-11-06 22:44:09,472 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:09,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:09,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:09,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:09,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2018-11-06 22:44:09,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:09,818 INFO L225 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 [2018-11-06 22:44:09,826 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:44:10,573 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-11-06 22:44:10,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:10,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2018-11-06 22:44:10,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:10,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-11-06 22:44:10,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-06 22:44:10,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-06 22:44:10,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:44:10,643 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 24 states. [2018-11-06 22:44:11,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:11,513 INFO L93 Difference]: Finished difference Result 301 states and 303 transitions. [2018-11-06 22:44:11,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-06 22:44:11,516 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 186 [2018-11-06 22:44:11,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:11,518 INFO L225 Difference]: With dead ends: 301 [2018-11-06 22:44:11,518 INFO L226 Difference]: Without dead ends: 220 [2018-11-06 22:44:11,518 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:44:11,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-11-06 22:44:11,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 192. [2018-11-06 22:44:11,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-11-06 22:44:11,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2018-11-06 22:44:11,522 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 186 [2018-11-06 22:44:11,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:11,523 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2018-11-06 22:44:11,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-06 22:44:11,523 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2018-11-06 22:44:11,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-11-06 22:44:11,524 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:11,524 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:11,524 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:11,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:11,525 INFO L82 PathProgramCache]: Analyzing trace with hash -379388500, now seen corresponding path program 19 times [2018-11-06 22:44:11,525 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:11,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:11,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:11,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:11,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1758 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2018-11-06 22:44:12,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:12,070 INFO L225 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 [2018-11-06 22:44:12,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:12,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1758 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2018-11-06 22:44:12,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:12,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-11-06 22:44:12,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-06 22:44:12,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-06 22:44:12,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:44:12,207 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand 25 states. [2018-11-06 22:44:13,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:13,842 INFO L93 Difference]: Finished difference Result 314 states and 316 transitions. [2018-11-06 22:44:13,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-06 22:44:13,843 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 191 [2018-11-06 22:44:13,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:13,845 INFO L225 Difference]: With dead ends: 314 [2018-11-06 22:44:13,845 INFO L226 Difference]: Without dead ends: 233 [2018-11-06 22:44:13,846 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:44:13,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-11-06 22:44:13,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 197. [2018-11-06 22:44:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-11-06 22:44:13,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-11-06 22:44:13,852 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 191 [2018-11-06 22:44:13,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:13,852 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-11-06 22:44:13,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-06 22:44:13,852 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-11-06 22:44:13,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-11-06 22:44:13,854 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:13,854 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:13,854 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:13,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:13,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1064823607, now seen corresponding path program 20 times [2018-11-06 22:44:13,855 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:13,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:13,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:13,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:13,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1865 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2018-11-06 22:44:14,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:14,366 INFO L225 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 [2018-11-06 22:44:14,376 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:44:14,425 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:44:14,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:14,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1865 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2018-11-06 22:44:14,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:14,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-11-06 22:44:14,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-06 22:44:14,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-06 22:44:14,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-06 22:44:14,492 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 26 states. [2018-11-06 22:44:14,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:14,842 INFO L93 Difference]: Finished difference Result 327 states and 329 transitions. [2018-11-06 22:44:14,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-06 22:44:14,842 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 196 [2018-11-06 22:44:14,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:14,844 INFO L225 Difference]: With dead ends: 327 [2018-11-06 22:44:14,844 INFO L226 Difference]: Without dead ends: 246 [2018-11-06 22:44:14,845 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-06 22:44:14,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-11-06 22:44:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 202. [2018-11-06 22:44:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-11-06 22:44:14,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2018-11-06 22:44:14,850 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 196 [2018-11-06 22:44:14,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:14,851 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2018-11-06 22:44:14,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-06 22:44:14,851 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2018-11-06 22:44:14,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-11-06 22:44:14,852 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:14,852 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:14,852 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:14,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:14,852 INFO L82 PathProgramCache]: Analyzing trace with hash 158721996, now seen corresponding path program 21 times [2018-11-06 22:44:14,853 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:14,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:14,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:14,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:14,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2018-11-06 22:44:15,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:15,451 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:44:15,459 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:44:16,250 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-11-06 22:44:16,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:16,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2018-11-06 22:44:16,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:16,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 28 [2018-11-06 22:44:16,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-06 22:44:16,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-06 22:44:16,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:44:16,757 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 28 states. [2018-11-06 22:44:17,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:17,701 INFO L93 Difference]: Finished difference Result 328 states and 336 transitions. [2018-11-06 22:44:17,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-06 22:44:17,708 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 201 [2018-11-06 22:44:17,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:17,709 INFO L225 Difference]: With dead ends: 328 [2018-11-06 22:44:17,709 INFO L226 Difference]: Without dead ends: 235 [2018-11-06 22:44:17,710 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=407, Invalid=715, Unknown=0, NotChecked=0, Total=1122 [2018-11-06 22:44:17,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-11-06 22:44:17,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 231. [2018-11-06 22:44:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-11-06 22:44:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2018-11-06 22:44:17,714 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 201 [2018-11-06 22:44:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:17,715 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2018-11-06 22:44:17,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-06 22:44:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2018-11-06 22:44:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-11-06 22:44:17,716 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:17,716 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:17,716 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:17,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:17,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1634366139, now seen corresponding path program 22 times [2018-11-06 22:44:17,717 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:17,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:17,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:17,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:17,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2604 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2018-11-06 22:44:19,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:19,049 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:44:19,058 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:44:20,656 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:44:20,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:20,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2604 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2018-11-06 22:44:20,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:20,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-11-06 22:44:20,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-06 22:44:20,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-06 22:44:20,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:44:20,779 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand 28 states. [2018-11-06 22:44:21,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:21,088 INFO L93 Difference]: Finished difference Result 353 states and 355 transitions. [2018-11-06 22:44:21,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-06 22:44:21,088 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 230 [2018-11-06 22:44:21,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:21,090 INFO L225 Difference]: With dead ends: 353 [2018-11-06 22:44:21,091 INFO L226 Difference]: Without dead ends: 248 [2018-11-06 22:44:21,092 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:44:21,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-11-06 22:44:21,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 236. [2018-11-06 22:44:21,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-11-06 22:44:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 237 transitions. [2018-11-06 22:44:21,096 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 237 transitions. Word has length 230 [2018-11-06 22:44:21,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:21,096 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 237 transitions. [2018-11-06 22:44:21,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-06 22:44:21,096 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 237 transitions. [2018-11-06 22:44:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-11-06 22:44:21,097 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:21,098 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:21,098 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:21,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:21,098 INFO L82 PathProgramCache]: Analyzing trace with hash 162383102, now seen corresponding path program 23 times [2018-11-06 22:44:21,098 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:21,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:21,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:21,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:21,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2726 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2018-11-06 22:44:21,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:21,909 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:44:21,923 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:44:22,487 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-11-06 22:44:22,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:22,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2726 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2018-11-06 22:44:22,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:22,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-11-06 22:44:22,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-06 22:44:22,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-06 22:44:22,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-11-06 22:44:22,558 INFO L87 Difference]: Start difference. First operand 236 states and 237 transitions. Second operand 29 states. [2018-11-06 22:44:22,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:22,810 INFO L93 Difference]: Finished difference Result 366 states and 368 transitions. [2018-11-06 22:44:22,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-06 22:44:22,811 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 235 [2018-11-06 22:44:22,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:22,813 INFO L225 Difference]: With dead ends: 366 [2018-11-06 22:44:22,814 INFO L226 Difference]: Without dead ends: 261 [2018-11-06 22:44:22,814 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-11-06 22:44:22,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-11-06 22:44:22,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2018-11-06 22:44:22,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-11-06 22:44:22,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2018-11-06 22:44:22,819 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 235 [2018-11-06 22:44:22,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:22,819 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2018-11-06 22:44:22,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-06 22:44:22,819 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2018-11-06 22:44:22,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-11-06 22:44:22,820 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:22,821 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:22,821 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:22,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:22,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1929536667, now seen corresponding path program 24 times [2018-11-06 22:44:22,821 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:22,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:22,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:22,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:22,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2853 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2018-11-06 22:44:23,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:23,713 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:44:23,720 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:44:32,957 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-11-06 22:44:32,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:32,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2853 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2018-11-06 22:44:33,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:33,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-11-06 22:44:33,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-06 22:44:33,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-06 22:44:33,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-11-06 22:44:33,054 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand 30 states. [2018-11-06 22:44:33,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:33,380 INFO L93 Difference]: Finished difference Result 379 states and 381 transitions. [2018-11-06 22:44:33,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-06 22:44:33,381 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 240 [2018-11-06 22:44:33,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:33,382 INFO L225 Difference]: With dead ends: 379 [2018-11-06 22:44:33,382 INFO L226 Difference]: Without dead ends: 274 [2018-11-06 22:44:33,383 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-11-06 22:44:33,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-11-06 22:44:33,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 246. [2018-11-06 22:44:33,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-11-06 22:44:33,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2018-11-06 22:44:33,388 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 240 [2018-11-06 22:44:33,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:33,388 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2018-11-06 22:44:33,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-06 22:44:33,388 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2018-11-06 22:44:33,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-11-06 22:44:33,389 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:33,390 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:33,390 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:33,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:33,390 INFO L82 PathProgramCache]: Analyzing trace with hash 480378654, now seen corresponding path program 25 times [2018-11-06 22:44:33,390 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:33,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:33,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:33,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:33,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2985 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2018-11-06 22:44:33,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:33,869 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:44:33,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:33,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2985 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2018-11-06 22:44:34,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:34,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-11-06 22:44:34,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-06 22:44:34,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-06 22:44:34,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-11-06 22:44:34,015 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand 31 states. [2018-11-06 22:44:34,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:34,299 INFO L93 Difference]: Finished difference Result 392 states and 394 transitions. [2018-11-06 22:44:34,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-06 22:44:34,300 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 245 [2018-11-06 22:44:34,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:34,305 INFO L225 Difference]: With dead ends: 392 [2018-11-06 22:44:34,305 INFO L226 Difference]: Without dead ends: 287 [2018-11-06 22:44:34,307 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-11-06 22:44:34,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-11-06 22:44:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 251. [2018-11-06 22:44:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-11-06 22:44:34,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 252 transitions. [2018-11-06 22:44:34,312 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 252 transitions. Word has length 245 [2018-11-06 22:44:34,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:34,313 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 252 transitions. [2018-11-06 22:44:34,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-06 22:44:34,313 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 252 transitions. [2018-11-06 22:44:34,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-11-06 22:44:34,316 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:34,316 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:34,317 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:34,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:34,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1211989627, now seen corresponding path program 26 times [2018-11-06 22:44:34,317 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:34,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:34,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:34,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:34,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3122 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2018-11-06 22:44:35,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:35,782 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:44:35,791 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:44:35,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:44:35,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:35,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3122 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2018-11-06 22:44:36,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:36,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-11-06 22:44:36,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-06 22:44:36,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-06 22:44:36,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-11-06 22:44:36,034 INFO L87 Difference]: Start difference. First operand 251 states and 252 transitions. Second operand 32 states. [2018-11-06 22:44:36,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:36,338 INFO L93 Difference]: Finished difference Result 405 states and 407 transitions. [2018-11-06 22:44:36,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-06 22:44:36,339 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 250 [2018-11-06 22:44:36,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:36,341 INFO L225 Difference]: With dead ends: 405 [2018-11-06 22:44:36,341 INFO L226 Difference]: Without dead ends: 300 [2018-11-06 22:44:36,342 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-11-06 22:44:36,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2018-11-06 22:44:36,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 256. [2018-11-06 22:44:36,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-11-06 22:44:36,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 257 transitions. [2018-11-06 22:44:36,348 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 257 transitions. Word has length 250 [2018-11-06 22:44:36,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:36,348 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 257 transitions. [2018-11-06 22:44:36,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-06 22:44:36,348 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 257 transitions. [2018-11-06 22:44:36,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-11-06 22:44:36,349 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:36,350 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:36,350 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:36,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:36,350 INFO L82 PathProgramCache]: Analyzing trace with hash 2074874174, now seen corresponding path program 27 times [2018-11-06 22:44:36,350 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:36,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:36,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:36,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:36,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3264 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2018-11-06 22:44:36,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:36,879 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:44:36,887 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:44:41,054 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-11-06 22:44:41,054 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:41,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3264 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2018-11-06 22:44:41,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:41,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28] total 34 [2018-11-06 22:44:41,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-06 22:44:41,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-06 22:44:41,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2018-11-06 22:44:41,176 INFO L87 Difference]: Start difference. First operand 256 states and 257 transitions. Second operand 34 states. [2018-11-06 22:44:41,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:41,579 INFO L93 Difference]: Finished difference Result 406 states and 414 transitions. [2018-11-06 22:44:41,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-06 22:44:41,580 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 255 [2018-11-06 22:44:41,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:41,582 INFO L225 Difference]: With dead ends: 406 [2018-11-06 22:44:41,582 INFO L226 Difference]: Without dead ends: 289 [2018-11-06 22:44:41,583 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=584, Invalid=976, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:44:41,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-11-06 22:44:41,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 285. [2018-11-06 22:44:41,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2018-11-06 22:44:41,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 286 transitions. [2018-11-06 22:44:41,588 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 286 transitions. Word has length 255 [2018-11-06 22:44:41,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:41,589 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 286 transitions. [2018-11-06 22:44:41,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-06 22:44:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 286 transitions. [2018-11-06 22:44:41,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-11-06 22:44:41,590 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:41,591 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:41,591 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:41,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:41,591 INFO L82 PathProgramCache]: Analyzing trace with hash 646200941, now seen corresponding path program 28 times [2018-11-06 22:44:41,591 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:41,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:41,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:41,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:41,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4065 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2018-11-06 22:44:43,319 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:43,319 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:44:43,327 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:44:46,799 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:44:46,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:46,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4065 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2018-11-06 22:44:46,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:46,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-11-06 22:44:46,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-06 22:44:46,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-06 22:44:46,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-11-06 22:44:46,915 INFO L87 Difference]: Start difference. First operand 285 states and 286 transitions. Second operand 34 states. [2018-11-06 22:44:47,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:47,297 INFO L93 Difference]: Finished difference Result 431 states and 433 transitions. [2018-11-06 22:44:47,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-06 22:44:47,297 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 284 [2018-11-06 22:44:47,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:47,298 INFO L225 Difference]: With dead ends: 431 [2018-11-06 22:44:47,298 INFO L226 Difference]: Without dead ends: 302 [2018-11-06 22:44:47,299 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-11-06 22:44:47,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-11-06 22:44:47,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 290. [2018-11-06 22:44:47,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-11-06 22:44:47,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 291 transitions. [2018-11-06 22:44:47,304 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 291 transitions. Word has length 284 [2018-11-06 22:44:47,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:47,304 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 291 transitions. [2018-11-06 22:44:47,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-06 22:44:47,305 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 291 transitions. [2018-11-06 22:44:47,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-11-06 22:44:47,306 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:47,306 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:47,307 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:47,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:47,307 INFO L82 PathProgramCache]: Analyzing trace with hash -219651984, now seen corresponding path program 29 times [2018-11-06 22:44:47,307 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:47,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:47,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:47,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:47,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4217 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2018-11-06 22:44:47,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:47,862 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:44:47,872 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:44:48,628 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2018-11-06 22:44:48,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:48,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4217 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2018-11-06 22:44:48,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:48,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-11-06 22:44:48,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-06 22:44:48,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-06 22:44:48,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-11-06 22:44:48,836 INFO L87 Difference]: Start difference. First operand 290 states and 291 transitions. Second operand 35 states. [2018-11-06 22:44:49,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:49,144 INFO L93 Difference]: Finished difference Result 444 states and 446 transitions. [2018-11-06 22:44:49,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-06 22:44:49,144 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 289 [2018-11-06 22:44:49,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:49,146 INFO L225 Difference]: With dead ends: 444 [2018-11-06 22:44:49,146 INFO L226 Difference]: Without dead ends: 315 [2018-11-06 22:44:49,147 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-11-06 22:44:49,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-11-06 22:44:49,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 295. [2018-11-06 22:44:49,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-11-06 22:44:49,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2018-11-06 22:44:49,152 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 289 [2018-11-06 22:44:49,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:49,152 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2018-11-06 22:44:49,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-06 22:44:49,153 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2018-11-06 22:44:49,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-11-06 22:44:49,154 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:49,154 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:49,154 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:49,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:49,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1323829325, now seen corresponding path program 30 times [2018-11-06 22:44:49,155 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:49,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:49,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:49,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:49,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:49,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4374 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2018-11-06 22:44:49,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:49,791 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:44:49,806 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:45:07,630 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2018-11-06 22:45:07,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:07,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4374 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2018-11-06 22:45:07,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:07,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-11-06 22:45:07,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-06 22:45:07,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-06 22:45:07,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-11-06 22:45:07,755 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand 36 states. [2018-11-06 22:45:08,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:08,161 INFO L93 Difference]: Finished difference Result 457 states and 459 transitions. [2018-11-06 22:45:08,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-06 22:45:08,162 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 294 [2018-11-06 22:45:08,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:08,164 INFO L225 Difference]: With dead ends: 457 [2018-11-06 22:45:08,164 INFO L226 Difference]: Without dead ends: 328 [2018-11-06 22:45:08,165 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-11-06 22:45:08,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-11-06 22:45:08,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 300. [2018-11-06 22:45:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-11-06 22:45:08,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 301 transitions. [2018-11-06 22:45:08,170 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 301 transitions. Word has length 294 [2018-11-06 22:45:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:08,170 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 301 transitions. [2018-11-06 22:45:08,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-06 22:45:08,170 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 301 transitions. [2018-11-06 22:45:08,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2018-11-06 22:45:08,172 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:08,172 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:08,172 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:08,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:08,173 INFO L82 PathProgramCache]: Analyzing trace with hash 213369488, now seen corresponding path program 31 times [2018-11-06 22:45:08,173 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:08,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:08,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:08,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:08,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4536 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2018-11-06 22:45:08,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:08,891 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:08,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:45:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:08,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4536 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2018-11-06 22:45:09,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:09,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-11-06 22:45:09,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-06 22:45:09,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-06 22:45:09,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-11-06 22:45:09,118 INFO L87 Difference]: Start difference. First operand 300 states and 301 transitions. Second operand 37 states. [2018-11-06 22:45:10,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:10,439 INFO L93 Difference]: Finished difference Result 470 states and 472 transitions. [2018-11-06 22:45:10,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-06 22:45:10,439 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 299 [2018-11-06 22:45:10,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:10,440 INFO L225 Difference]: With dead ends: 470 [2018-11-06 22:45:10,440 INFO L226 Difference]: Without dead ends: 341 [2018-11-06 22:45:10,441 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-11-06 22:45:10,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2018-11-06 22:45:10,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 305. [2018-11-06 22:45:10,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-11-06 22:45:10,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 306 transitions. [2018-11-06 22:45:10,446 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 306 transitions. Word has length 299 [2018-11-06 22:45:10,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:10,446 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 306 transitions. [2018-11-06 22:45:10,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-06 22:45:10,446 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 306 transitions. [2018-11-06 22:45:10,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-11-06 22:45:10,448 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:10,448 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:10,448 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:10,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:10,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1879112237, now seen corresponding path program 32 times [2018-11-06 22:45:10,449 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:10,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:10,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:10,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:45:10,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4703 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2018-11-06 22:45:11,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:11,748 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:11,756 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:45:11,836 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:45:11,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:11,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4703 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2018-11-06 22:45:12,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:12,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-11-06 22:45:12,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-06 22:45:12,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-06 22:45:12,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-11-06 22:45:12,043 INFO L87 Difference]: Start difference. First operand 305 states and 306 transitions. Second operand 38 states. [2018-11-06 22:45:12,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:12,553 INFO L93 Difference]: Finished difference Result 483 states and 485 transitions. [2018-11-06 22:45:12,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-06 22:45:12,554 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 304 [2018-11-06 22:45:12,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:12,556 INFO L225 Difference]: With dead ends: 483 [2018-11-06 22:45:12,557 INFO L226 Difference]: Without dead ends: 354 [2018-11-06 22:45:12,557 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-11-06 22:45:12,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2018-11-06 22:45:12,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 310. [2018-11-06 22:45:12,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2018-11-06 22:45:12,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 311 transitions. [2018-11-06 22:45:12,562 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 311 transitions. Word has length 304 [2018-11-06 22:45:12,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:12,562 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 311 transitions. [2018-11-06 22:45:12,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-06 22:45:12,563 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 311 transitions. [2018-11-06 22:45:12,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-11-06 22:45:12,564 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:12,564 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:12,564 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:12,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:12,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1731527504, now seen corresponding path program 33 times [2018-11-06 22:45:12,565 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:12,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:12,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:12,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:12,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4875 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2018-11-06 22:45:13,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:13,251 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:13,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:45:21,992 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2018-11-06 22:45:21,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:22,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4875 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2018-11-06 22:45:22,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:22,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34] total 40 [2018-11-06 22:45:22,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-06 22:45:22,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-06 22:45:22,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:45:22,167 INFO L87 Difference]: Start difference. First operand 310 states and 311 transitions. Second operand 40 states. [2018-11-06 22:45:22,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:22,583 INFO L93 Difference]: Finished difference Result 484 states and 492 transitions. [2018-11-06 22:45:22,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-06 22:45:22,584 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 309 [2018-11-06 22:45:22,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:22,586 INFO L225 Difference]: With dead ends: 484 [2018-11-06 22:45:22,586 INFO L226 Difference]: Without dead ends: 343 [2018-11-06 22:45:22,587 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=797, Invalid=1273, Unknown=0, NotChecked=0, Total=2070 [2018-11-06 22:45:22,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-11-06 22:45:22,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 339. [2018-11-06 22:45:22,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-11-06 22:45:22,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 340 transitions. [2018-11-06 22:45:22,591 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 340 transitions. Word has length 309 [2018-11-06 22:45:22,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:22,591 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 340 transitions. [2018-11-06 22:45:22,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-06 22:45:22,592 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 340 transitions. [2018-11-06 22:45:22,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-11-06 22:45:22,593 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:22,593 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:22,594 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:22,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:22,594 INFO L82 PathProgramCache]: Analyzing trace with hash 172235807, now seen corresponding path program 34 times [2018-11-06 22:45:22,594 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:22,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:22,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:22,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:22,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5850 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 2628 trivial. 0 not checked. [2018-11-06 22:45:23,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:23,558 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:23,566 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:45:31,746 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:45:31,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:31,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5850 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 2628 trivial. 0 not checked. [2018-11-06 22:45:31,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:31,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-11-06 22:45:31,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-06 22:45:31,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-06 22:45:31,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:45:31,883 INFO L87 Difference]: Start difference. First operand 339 states and 340 transitions. Second operand 40 states. [2018-11-06 22:45:32,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:32,496 INFO L93 Difference]: Finished difference Result 509 states and 511 transitions. [2018-11-06 22:45:32,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-06 22:45:32,496 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 338 [2018-11-06 22:45:32,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:32,498 INFO L225 Difference]: With dead ends: 509 [2018-11-06 22:45:32,498 INFO L226 Difference]: Without dead ends: 356 [2018-11-06 22:45:32,500 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:45:32,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2018-11-06 22:45:32,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 344. [2018-11-06 22:45:32,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2018-11-06 22:45:32,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 345 transitions. [2018-11-06 22:45:32,505 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 345 transitions. Word has length 338 [2018-11-06 22:45:32,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:32,505 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 345 transitions. [2018-11-06 22:45:32,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-06 22:45:32,505 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 345 transitions. [2018-11-06 22:45:32,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2018-11-06 22:45:32,507 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:32,507 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:32,508 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:32,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:32,508 INFO L82 PathProgramCache]: Analyzing trace with hash -755515934, now seen corresponding path program 35 times [2018-11-06 22:45:32,508 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:32,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:32,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:32,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:32,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6032 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 2628 trivial. 0 not checked. [2018-11-06 22:45:33,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:33,286 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:33,294 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:45:34,805 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2018-11-06 22:45:34,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:34,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6032 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 2628 trivial. 0 not checked. [2018-11-06 22:45:35,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:35,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-11-06 22:45:35,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-11-06 22:45:35,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-11-06 22:45:35,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-11-06 22:45:35,005 INFO L87 Difference]: Start difference. First operand 344 states and 345 transitions. Second operand 41 states. [2018-11-06 22:45:35,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:35,456 INFO L93 Difference]: Finished difference Result 522 states and 524 transitions. [2018-11-06 22:45:35,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-06 22:45:35,456 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 343 [2018-11-06 22:45:35,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:35,458 INFO L225 Difference]: With dead ends: 522 [2018-11-06 22:45:35,458 INFO L226 Difference]: Without dead ends: 369 [2018-11-06 22:45:35,459 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-11-06 22:45:35,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2018-11-06 22:45:35,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 349. [2018-11-06 22:45:35,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2018-11-06 22:45:35,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 350 transitions. [2018-11-06 22:45:35,464 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 350 transitions. Word has length 343 [2018-11-06 22:45:35,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:35,464 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 350 transitions. [2018-11-06 22:45:35,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-11-06 22:45:35,465 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 350 transitions. [2018-11-06 22:45:35,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-11-06 22:45:35,466 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:35,466 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 37, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:35,467 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:35,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:35,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1960722945, now seen corresponding path program 36 times [2018-11-06 22:45:35,467 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:35,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:35,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:35,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:35,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6219 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 2628 trivial. 0 not checked. [2018-11-06 22:45:36,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:36,245 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:36,253 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:46:24,359 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-11-06 22:46:24,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:46:24,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:46:24,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6219 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 2628 trivial. 0 not checked. [2018-11-06 22:46:24,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:46:24,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-11-06 22:46:24,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-06 22:46:24,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-06 22:46:24,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-11-06 22:46:24,608 INFO L87 Difference]: Start difference. First operand 349 states and 350 transitions. Second operand 42 states. [2018-11-06 22:46:25,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:46:25,123 INFO L93 Difference]: Finished difference Result 535 states and 537 transitions. [2018-11-06 22:46:25,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-06 22:46:25,124 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 348 [2018-11-06 22:46:25,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:46:25,126 INFO L225 Difference]: With dead ends: 535 [2018-11-06 22:46:25,126 INFO L226 Difference]: Without dead ends: 382 [2018-11-06 22:46:25,127 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-11-06 22:46:25,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2018-11-06 22:46:25,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 354. [2018-11-06 22:46:25,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2018-11-06 22:46:25,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 355 transitions. [2018-11-06 22:46:25,132 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 355 transitions. Word has length 348 [2018-11-06 22:46:25,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:46:25,132 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 355 transitions. [2018-11-06 22:46:25,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-06 22:46:25,132 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 355 transitions. [2018-11-06 22:46:25,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-11-06 22:46:25,133 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:46:25,134 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 37, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:46:25,134 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:46:25,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:46:25,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1900787710, now seen corresponding path program 37 times [2018-11-06 22:46:25,134 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:46:25,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:46:25,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:25,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:46:25,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6411 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 2628 trivial. 0 not checked. [2018-11-06 22:46:25,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:46:25,936 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:46:25,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:46:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:26,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:46:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6411 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 2628 trivial. 0 not checked. [2018-11-06 22:46:26,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:46:26,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-11-06 22:46:26,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-06 22:46:26,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-06 22:46:26,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-11-06 22:46:26,131 INFO L87 Difference]: Start difference. First operand 354 states and 355 transitions. Second operand 43 states. [2018-11-06 22:46:26,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:46:26,587 INFO L93 Difference]: Finished difference Result 548 states and 550 transitions. [2018-11-06 22:46:26,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-06 22:46:26,588 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 353 [2018-11-06 22:46:26,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:46:26,590 INFO L225 Difference]: With dead ends: 548 [2018-11-06 22:46:26,590 INFO L226 Difference]: Without dead ends: 395 [2018-11-06 22:46:26,591 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-11-06 22:46:26,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2018-11-06 22:46:26,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 359. [2018-11-06 22:46:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-11-06 22:46:26,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 360 transitions. [2018-11-06 22:46:26,595 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 360 transitions. Word has length 353 [2018-11-06 22:46:26,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:46:26,596 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 360 transitions. [2018-11-06 22:46:26,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-06 22:46:26,596 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 360 transitions. [2018-11-06 22:46:26,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-11-06 22:46:26,598 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:46:26,598 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 37, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:46:26,598 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:46:26,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:46:26,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2017888223, now seen corresponding path program 38 times [2018-11-06 22:46:26,599 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:46:26,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:46:26,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:26,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:46:26,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6608 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 2628 trivial. 0 not checked. [2018-11-06 22:46:28,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:46:28,098 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:46:28,105 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:46:28,191 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:46:28,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:46:28,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:46:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6608 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 2628 trivial. 0 not checked. [2018-11-06 22:46:28,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:46:28,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-11-06 22:46:28,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-06 22:46:28,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-06 22:46:28,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-11-06 22:46:28,317 INFO L87 Difference]: Start difference. First operand 359 states and 360 transitions. Second operand 44 states. [2018-11-06 22:46:28,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:46:28,729 INFO L93 Difference]: Finished difference Result 561 states and 563 transitions. [2018-11-06 22:46:28,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-06 22:46:28,729 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 358 [2018-11-06 22:46:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:46:28,731 INFO L225 Difference]: With dead ends: 561 [2018-11-06 22:46:28,731 INFO L226 Difference]: Without dead ends: 408 [2018-11-06 22:46:28,732 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-11-06 22:46:28,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2018-11-06 22:46:28,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 364. [2018-11-06 22:46:28,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-11-06 22:46:28,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 365 transitions. [2018-11-06 22:46:28,737 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 365 transitions. Word has length 358 [2018-11-06 22:46:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:46:28,737 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 365 transitions. [2018-11-06 22:46:28,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-06 22:46:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 365 transitions. [2018-11-06 22:46:28,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-11-06 22:46:28,739 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:46:28,740 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 37, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:46:28,740 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:46:28,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:46:28,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1268602334, now seen corresponding path program 39 times [2018-11-06 22:46:28,740 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:46:28,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:46:28,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:28,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:46:28,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6810 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 2628 trivial. 0 not checked. [2018-11-06 22:46:30,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:46:30,024 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:46:30,033 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:46:51,707 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2018-11-06 22:46:51,708 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:46:51,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:46:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6810 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 4182 trivial. 0 not checked. [2018-11-06 22:46:52,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:46:52,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 40] total 46 [2018-11-06 22:46:52,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-11-06 22:46:52,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-11-06 22:46:52,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2018-11-06 22:46:52,487 INFO L87 Difference]: Start difference. First operand 364 states and 365 transitions. Second operand 46 states. [2018-11-06 22:46:53,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:46:53,543 INFO L93 Difference]: Finished difference Result 562 states and 570 transitions. [2018-11-06 22:46:53,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-06 22:46:53,543 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 363 [2018-11-06 22:46:53,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:46:53,545 INFO L225 Difference]: With dead ends: 562 [2018-11-06 22:46:53,546 INFO L226 Difference]: Without dead ends: 397 [2018-11-06 22:46:53,547 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1046, Invalid=1606, Unknown=0, NotChecked=0, Total=2652 [2018-11-06 22:46:53,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2018-11-06 22:46:53,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 393. [2018-11-06 22:46:53,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2018-11-06 22:46:53,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 394 transitions. [2018-11-06 22:46:53,552 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 394 transitions. Word has length 363 [2018-11-06 22:46:53,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:46:53,552 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 394 transitions. [2018-11-06 22:46:53,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-11-06 22:46:53,552 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 394 transitions. [2018-11-06 22:46:53,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2018-11-06 22:46:53,554 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:46:53,555 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:46:53,555 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:46:53,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:46:53,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1117653969, now seen corresponding path program 40 times [2018-11-06 22:46:53,555 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:46:53,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:46:53,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:53,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:46:53,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7959 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 3570 trivial. 0 not checked. [2018-11-06 22:46:54,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:46:54,657 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:46:54,665 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:47:06,773 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:47:06,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:47:06,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:47:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7959 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 3570 trivial. 0 not checked. [2018-11-06 22:47:06,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:47:06,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-11-06 22:47:06,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-11-06 22:47:06,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-11-06 22:47:06,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-11-06 22:47:06,902 INFO L87 Difference]: Start difference. First operand 393 states and 394 transitions. Second operand 46 states. [2018-11-06 22:47:07,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:47:07,365 INFO L93 Difference]: Finished difference Result 587 states and 589 transitions. [2018-11-06 22:47:07,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-06 22:47:07,366 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 392 [2018-11-06 22:47:07,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:47:07,368 INFO L225 Difference]: With dead ends: 587 [2018-11-06 22:47:07,368 INFO L226 Difference]: Without dead ends: 410 [2018-11-06 22:47:07,370 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-11-06 22:47:07,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2018-11-06 22:47:07,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 398. [2018-11-06 22:47:07,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2018-11-06 22:47:07,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 399 transitions. [2018-11-06 22:47:07,375 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 399 transitions. Word has length 392 [2018-11-06 22:47:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:47:07,376 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 399 transitions. [2018-11-06 22:47:07,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-11-06 22:47:07,376 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 399 transitions. [2018-11-06 22:47:07,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2018-11-06 22:47:07,378 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:47:07,378 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 43, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:47:07,378 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:47:07,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:47:07,379 INFO L82 PathProgramCache]: Analyzing trace with hash 736877908, now seen corresponding path program 41 times [2018-11-06 22:47:07,379 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:47:07,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:47:07,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:47:07,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:47:07,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:47:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:47:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8171 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 3570 trivial. 0 not checked. [2018-11-06 22:47:08,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:47:08,481 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:47:08,490 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:47:11,591 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 44 check-sat command(s) [2018-11-06 22:47:11,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:47:11,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:47:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8171 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 3570 trivial. 0 not checked. [2018-11-06 22:47:11,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:47:11,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2018-11-06 22:47:11,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-11-06 22:47:11,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-11-06 22:47:11,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-11-06 22:47:11,723 INFO L87 Difference]: Start difference. First operand 398 states and 399 transitions. Second operand 47 states. [2018-11-06 22:47:12,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:47:12,187 INFO L93 Difference]: Finished difference Result 600 states and 602 transitions. [2018-11-06 22:47:12,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-06 22:47:12,187 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 397 [2018-11-06 22:47:12,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:47:12,190 INFO L225 Difference]: With dead ends: 600 [2018-11-06 22:47:12,190 INFO L226 Difference]: Without dead ends: 423 [2018-11-06 22:47:12,191 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-11-06 22:47:12,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-11-06 22:47:12,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 403. [2018-11-06 22:47:12,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2018-11-06 22:47:12,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2018-11-06 22:47:12,196 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 397 [2018-11-06 22:47:12,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:47:12,197 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2018-11-06 22:47:12,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-11-06 22:47:12,197 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2018-11-06 22:47:12,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2018-11-06 22:47:12,199 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:47:12,199 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 43, 43, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:47:12,200 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:47:12,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:47:12,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1893497423, now seen corresponding path program 42 times [2018-11-06 22:47:12,200 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:47:12,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:47:12,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:47:12,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:47:12,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:47:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:47:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8388 backedges. 0 proven. 4818 refuted. 0 times theorem prover too weak. 3570 trivial. 0 not checked. [2018-11-06 22:47:13,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:47:13,280 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:47:13,302 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown