java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-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-lit/mcmillan2006_true-unreach-call_true-termination.c.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:50:37,728 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:50:37,730 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:50:37,743 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:50:37,743 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:50:37,744 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:50:37,746 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:50:37,747 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:50:37,749 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:50:37,750 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:50:37,751 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:50:37,751 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:50:37,752 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:50:37,753 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:50:37,755 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:50:37,755 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:50:37,756 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:50:37,759 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:50:37,764 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:50:37,768 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:50:37,769 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:50:37,776 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:50:37,781 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:50:37,801 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-22 15:50:37,830 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:50:37,831 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:50:37,831 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:50:37,833 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:50:37,834 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:50:37,834 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:50:37,834 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:50:37,834 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:50:37,835 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:50:37,836 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:50:37,836 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:50:37,836 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:50:37,836 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:50:37,837 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:50:37,837 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:50:37,837 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:50:37,837 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:50:37,837 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:50:37,838 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:50:37,839 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:50:37,839 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:50:37,839 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:50:37,839 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:50:37,840 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:50:37,840 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:50:37,840 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:50:37,840 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:50:37,840 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:50:37,896 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:50:37,909 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:50:37,914 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:50:37,916 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:50:37,916 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:50:37,917 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-lit/mcmillan2006_true-unreach-call_true-termination.c.i [2018-10-22 15:50:37,984 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/37b4168e5/b9c9a7c68dc9488ebd8894148c74c711/FLAG9cc74b4bf [2018-10-22 15:50:38,473 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:50:38,474 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006_true-unreach-call_true-termination.c.i [2018-10-22 15:50:38,481 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/37b4168e5/b9c9a7c68dc9488ebd8894148c74c711/FLAG9cc74b4bf [2018-10-22 15:50:38,496 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/37b4168e5/b9c9a7c68dc9488ebd8894148c74c711 [2018-10-22 15:50:38,508 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:50:38,512 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:50:38,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:50:38,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:50:38,517 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:50:38,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:50:38" (1/1) ... [2018-10-22 15:50:38,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11f07f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:38, skipping insertion in model container [2018-10-22 15:50:38,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:50:38" (1/1) ... [2018-10-22 15:50:38,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:50:38,559 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:50:38,747 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:50:38,757 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:50:38,774 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:50:38,790 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:50:38,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:38 WrapperNode [2018-10-22 15:50:38,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:50:38,791 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:50:38,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:50:38,792 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:50:38,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:38" (1/1) ... [2018-10-22 15:50:38,809 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:38" (1/1) ... [2018-10-22 15:50:38,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:50:38,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:50:38,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:50:38,832 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:50:38,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:38" (1/1) ... [2018-10-22 15:50:38,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:38" (1/1) ... [2018-10-22 15:50:38,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:38" (1/1) ... [2018-10-22 15:50:38,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:38" (1/1) ... [2018-10-22 15:50:38,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:38" (1/1) ... [2018-10-22 15:50:38,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:38" (1/1) ... [2018-10-22 15:50:38,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:38" (1/1) ... [2018-10-22 15:50:38,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:50:38,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:50:38,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:50:38,858 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:50:38,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:50:38,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:50:39,296 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:50:39,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:50:39 BoogieIcfgContainer [2018-10-22 15:50:39,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:50:39,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:50:39,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:50:39,301 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:50:39,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:50:38" (1/3) ... [2018-10-22 15:50:39,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a757d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:50:39, skipping insertion in model container [2018-10-22 15:50:39,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:38" (2/3) ... [2018-10-22 15:50:39,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a757d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:50:39, skipping insertion in model container [2018-10-22 15:50:39,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:50:39" (3/3) ... [2018-10-22 15:50:39,305 INFO L112 eAbstractionObserver]: Analyzing ICFG mcmillan2006_true-unreach-call_true-termination.c.i [2018-10-22 15:50:39,316 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:50:39,325 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:50:39,349 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:50:39,384 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:50:39,385 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:50:39,385 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:50:39,385 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:50:39,385 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:50:39,385 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:50:39,385 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:50:39,385 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:50:39,386 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:50:39,398 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2018-10-22 15:50:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-22 15:50:39,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:39,406 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:39,408 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:39,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:39,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1505404269, now seen corresponding path program 1 times [2018-10-22 15:50:39,420 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:39,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:39,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:39,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:39,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:39,556 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:50:39,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:50:39,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:50:39,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:50:39,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:50:39,577 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2018-10-22 15:50:39,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:39,594 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2018-10-22 15:50:39,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:50:39,596 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-10-22 15:50:39,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:39,608 INFO L225 Difference]: With dead ends: 30 [2018-10-22 15:50:39,608 INFO L226 Difference]: Without dead ends: 14 [2018-10-22 15:50:39,611 INFO L605 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 [2018-10-22 15:50:39,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-22 15:50:39,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-22 15:50:39,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 15:50:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-22 15:50:39,650 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2018-10-22 15:50:39,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:39,650 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-22 15:50:39,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:50:39,650 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-22 15:50:39,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:50:39,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:39,651 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:39,652 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:39,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:39,652 INFO L82 PathProgramCache]: Analyzing trace with hash -207585610, now seen corresponding path program 1 times [2018-10-22 15:50:39,652 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:39,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:39,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:39,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:39,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:39,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:39,978 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:50:39,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:50:39,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:50:39,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:50:39,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:50:39,981 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-10-22 15:50:40,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:40,119 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-10-22 15:50:40,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:50:40,120 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-10-22 15:50:40,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:40,120 INFO L225 Difference]: With dead ends: 27 [2018-10-22 15:50:40,121 INFO L226 Difference]: Without dead ends: 17 [2018-10-22 15:50:40,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:50:40,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-22 15:50:40,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2018-10-22 15:50:40,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 15:50:40,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-10-22 15:50:40,126 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 10 [2018-10-22 15:50:40,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:40,127 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-10-22 15:50:40,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:50:40,127 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-10-22 15:50:40,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 15:50:40,128 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:40,128 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:40,128 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:40,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:40,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1943052177, now seen corresponding path program 1 times [2018-10-22 15:50:40,129 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:40,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:40,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:40,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:40,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:40,448 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 11 [2018-10-22 15:50:40,693 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2018-10-22 15:50:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:40,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:40,723 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:40,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:40,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:40,822 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-10-22 15:50:40,829 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-10-22 15:50:40,830 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:50:40,835 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:40,842 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:40,842 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2018-10-22 15:50:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:40,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:40,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2018-10-22 15:50:40,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:50:40,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:50:40,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:50:40,932 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 10 states. [2018-10-22 15:50:41,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:41,267 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2018-10-22 15:50:41,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:50:41,268 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2018-10-22 15:50:41,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:41,269 INFO L225 Difference]: With dead ends: 26 [2018-10-22 15:50:41,269 INFO L226 Difference]: Without dead ends: 24 [2018-10-22 15:50:41,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:50:41,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-22 15:50:41,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2018-10-22 15:50:41,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-22 15:50:41,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-22 15:50:41,275 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2018-10-22 15:50:41,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:41,276 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-22 15:50:41,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:50:41,276 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-22 15:50:41,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-22 15:50:41,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:41,277 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:41,277 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:41,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:41,278 INFO L82 PathProgramCache]: Analyzing trace with hash -849476735, now seen corresponding path program 1 times [2018-10-22 15:50:41,278 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:41,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:41,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:41,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:41,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:41,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:41,412 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:41,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:41,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:41,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:41,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-10-22 15:50:41,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:50:41,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:50:41,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:50:41,694 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-10-22 15:50:42,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:42,075 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-22 15:50:42,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:50:42,076 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-22 15:50:42,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:42,077 INFO L225 Difference]: With dead ends: 38 [2018-10-22 15:50:42,077 INFO L226 Difference]: Without dead ends: 23 [2018-10-22 15:50:42,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:50:42,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-22 15:50:42,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2018-10-22 15:50:42,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-22 15:50:42,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-22 15:50:42,084 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2018-10-22 15:50:42,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:42,084 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-22 15:50:42,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:50:42,085 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-22 15:50:42,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 15:50:42,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:42,086 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:42,086 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:42,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:42,086 INFO L82 PathProgramCache]: Analyzing trace with hash -2114381476, now seen corresponding path program 2 times [2018-10-22 15:50:42,087 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:42,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:42,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:42,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:42,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:42,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:42,441 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:42,457 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:42,511 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:42,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:42,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:42,694 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-22 15:50:42,697 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-22 15:50:42,698 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:50:42,703 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:42,708 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:42,708 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2018-10-22 15:50:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:42,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:42,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2018-10-22 15:50:42,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:50:42,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:50:42,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:50:42,899 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 17 states. [2018-10-22 15:50:43,466 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2018-10-22 15:50:44,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:44,203 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2018-10-22 15:50:44,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:50:44,204 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2018-10-22 15:50:44,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:44,205 INFO L225 Difference]: With dead ends: 62 [2018-10-22 15:50:44,205 INFO L226 Difference]: Without dead ends: 60 [2018-10-22 15:50:44,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:50:44,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-22 15:50:44,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 36. [2018-10-22 15:50:44,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-22 15:50:44,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-10-22 15:50:44,216 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 21 [2018-10-22 15:50:44,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:44,216 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-10-22 15:50:44,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:50:44,217 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-10-22 15:50:44,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-22 15:50:44,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:44,218 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:44,218 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:44,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:44,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1975387279, now seen corresponding path program 3 times [2018-10-22 15:50:44,219 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:44,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:44,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:44,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:44,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:44,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:44,631 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:44,645 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:44,716 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:50:44,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:44,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:44,749 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:50:44,751 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:50:44,752 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:50:44,759 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:44,765 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:44,766 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2018-10-22 15:50:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:45,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:45,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2018-10-22 15:50:45,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:50:45,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:50:45,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:50:45,178 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 21 states. [2018-10-22 15:50:46,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:46,480 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2018-10-22 15:50:46,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:50:46,483 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2018-10-22 15:50:46,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:46,484 INFO L225 Difference]: With dead ends: 73 [2018-10-22 15:50:46,484 INFO L226 Difference]: Without dead ends: 34 [2018-10-22 15:50:46,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=340, Invalid=1300, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:50:46,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-22 15:50:46,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-10-22 15:50:46,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-22 15:50:46,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-22 15:50:46,493 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2018-10-22 15:50:46,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:46,493 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-22 15:50:46,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:50:46,493 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-22 15:50:46,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-22 15:50:46,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:46,495 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:46,495 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:46,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:46,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1638908234, now seen corresponding path program 4 times [2018-10-22 15:50:46,495 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:46,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:46,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:46,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:46,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:46,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:46,784 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:46,793 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:46,823 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:46,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:46,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:46,915 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:50:46,920 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:50:46,920 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:50:46,925 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:46,933 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:46,933 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-10-22 15:50:47,030 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-22 15:50:47,033 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:50:47,035 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 27 [2018-10-22 15:50:47,036 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:50:47,042 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:47,051 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:47,052 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:11 [2018-10-22 15:50:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:47,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:47,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2018-10-22 15:50:47,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:50:47,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:50:47,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:50:47,191 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2018-10-22 15:50:47,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:47,874 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2018-10-22 15:50:47,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:50:47,874 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-22 15:50:47,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:47,875 INFO L225 Difference]: With dead ends: 44 [2018-10-22 15:50:47,875 INFO L226 Difference]: Without dead ends: 42 [2018-10-22 15:50:47,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:50:47,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-22 15:50:47,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2018-10-22 15:50:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-22 15:50:47,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-10-22 15:50:47,885 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2018-10-22 15:50:47,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:47,885 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-10-22 15:50:47,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:50:47,886 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-10-22 15:50:47,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-22 15:50:47,887 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:47,887 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:47,887 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:47,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:47,888 INFO L82 PathProgramCache]: Analyzing trace with hash -336784516, now seen corresponding path program 5 times [2018-10-22 15:50:47,888 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:47,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:47,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:47,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:47,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:48,688 WARN L179 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2018-10-22 15:50:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:48,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:48,905 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:48,923 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:49,018 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-22 15:50:49,018 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:49,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:49,107 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-22 15:50:49,113 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-22 15:50:49,114 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:50:49,116 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:49,122 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:49,123 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2018-10-22 15:50:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:49,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:49,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2018-10-22 15:50:49,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:50:49,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:50:49,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:50:49,346 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 25 states. [2018-10-22 15:50:50,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:50,810 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2018-10-22 15:50:50,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 15:50:50,811 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 37 [2018-10-22 15:50:50,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:50,812 INFO L225 Difference]: With dead ends: 79 [2018-10-22 15:50:50,812 INFO L226 Difference]: Without dead ends: 51 [2018-10-22 15:50:50,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=294, Invalid=1686, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:50:50,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-22 15:50:50,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2018-10-22 15:50:50,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-22 15:50:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-10-22 15:50:50,823 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 37 [2018-10-22 15:50:50,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:50,824 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-10-22 15:50:50,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:50:50,824 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-10-22 15:50:50,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-22 15:50:50,825 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:50,825 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:50,825 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:50,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:50,826 INFO L82 PathProgramCache]: Analyzing trace with hash 877805393, now seen corresponding path program 6 times [2018-10-22 15:50:50,826 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:50,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:50,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:50,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:50,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 15 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:51,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:51,204 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:51,213 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:51,270 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-22 15:50:51,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:51,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:51,339 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:50:51,354 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:50:51,355 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:50:51,374 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:51,404 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:51,405 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2018-10-22 15:50:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 38 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:51,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:51,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 27 [2018-10-22 15:50:51,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-22 15:50:51,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-22 15:50:51,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:50:51,819 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 27 states. [2018-10-22 15:50:52,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:52,779 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-22 15:50:52,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:50:52,780 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 45 [2018-10-22 15:50:52,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:52,781 INFO L225 Difference]: With dead ends: 80 [2018-10-22 15:50:52,781 INFO L226 Difference]: Without dead ends: 50 [2018-10-22 15:50:52,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=390, Invalid=1772, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:50:52,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-22 15:50:52,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-10-22 15:50:52,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-22 15:50:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-22 15:50:52,792 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2018-10-22 15:50:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:52,792 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-22 15:50:52,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-22 15:50:52,793 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-22 15:50:52,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-22 15:50:52,794 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:52,794 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:52,794 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:52,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:52,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1622976362, now seen corresponding path program 7 times [2018-10-22 15:50:52,794 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:52,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:52,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:52,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:52,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:53,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:53,744 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:53,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:53,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:53,807 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:50:53,816 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:50:53,816 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:50:53,818 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:53,828 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:53,828 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-10-22 15:50:53,868 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-22 15:50:53,870 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:50:53,872 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 27 [2018-10-22 15:50:53,873 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:50:53,886 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:53,898 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:53,898 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:11 [2018-10-22 15:50:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:54,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:54,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 23 [2018-10-22 15:50:54,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:50:54,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:50:54,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:50:54,077 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 23 states. [2018-10-22 15:50:55,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:55,027 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2018-10-22 15:50:55,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:50:55,027 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2018-10-22 15:50:55,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:55,029 INFO L225 Difference]: With dead ends: 60 [2018-10-22 15:50:55,029 INFO L226 Difference]: Without dead ends: 58 [2018-10-22 15:50:55,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:50:55,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-22 15:50:55,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2018-10-22 15:50:55,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-22 15:50:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-10-22 15:50:55,041 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 48 [2018-10-22 15:50:55,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:55,041 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-10-22 15:50:55,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:50:55,042 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-10-22 15:50:55,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-22 15:50:55,042 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:55,043 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:55,043 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:55,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:55,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1304484452, now seen corresponding path program 8 times [2018-10-22 15:50:55,044 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:55,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:55,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:55,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:55,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 30 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:55,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:55,568 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:55,575 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:55,616 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:55,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:55,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:55,721 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-22 15:50:55,728 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-22 15:50:55,728 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:50:55,729 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:55,731 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:55,731 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2018-10-22 15:50:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:56,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:56,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2018-10-22 15:50:56,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 15:50:56,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 15:50:56,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:50:56,032 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 33 states. [2018-10-22 15:50:58,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:58,085 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2018-10-22 15:50:58,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-22 15:50:58,086 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 53 [2018-10-22 15:50:58,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:58,087 INFO L225 Difference]: With dead ends: 105 [2018-10-22 15:50:58,088 INFO L226 Difference]: Without dead ends: 67 [2018-10-22 15:50:58,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=430, Invalid=3230, Unknown=0, NotChecked=0, Total=3660 [2018-10-22 15:50:58,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-22 15:50:58,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2018-10-22 15:50:58,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-22 15:50:58,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-10-22 15:50:58,100 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 53 [2018-10-22 15:50:58,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:58,100 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-10-22 15:50:58,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-22 15:50:58,100 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-10-22 15:50:58,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-22 15:50:58,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:58,101 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:58,102 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:58,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:58,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1308584753, now seen corresponding path program 9 times [2018-10-22 15:50:58,102 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:58,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:58,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:58,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:58,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 50 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:58,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:58,759 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:58,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:58,822 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-22 15:50:58,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:58,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:58,869 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:50:58,872 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:50:58,872 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:50:58,874 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:58,880 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:58,880 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2018-10-22 15:50:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 87 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:59,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:59,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 33 [2018-10-22 15:50:59,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 15:50:59,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 15:50:59,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:50:59,368 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 33 states. [2018-10-22 15:51:01,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:01,860 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2018-10-22 15:51:01,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-22 15:51:01,861 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 61 [2018-10-22 15:51:01,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:01,862 INFO L225 Difference]: With dead ends: 106 [2018-10-22 15:51:01,862 INFO L226 Difference]: Without dead ends: 66 [2018-10-22 15:51:01,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=700, Invalid=2960, Unknown=0, NotChecked=0, Total=3660 [2018-10-22 15:51:01,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-22 15:51:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-10-22 15:51:01,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-22 15:51:01,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-22 15:51:01,874 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 61 [2018-10-22 15:51:01,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:01,875 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-22 15:51:01,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-22 15:51:01,875 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-22 15:51:01,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-22 15:51:01,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:01,876 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:01,876 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:01,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:01,877 INFO L82 PathProgramCache]: Analyzing trace with hash 191322742, now seen corresponding path program 10 times [2018-10-22 15:51:01,877 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:01,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:01,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:01,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:01,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:02,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:02,332 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:02,340 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:02,428 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:02,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:02,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:02,488 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:51:02,490 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:51:02,490 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:51:02,494 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:02,503 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:02,503 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-10-22 15:51:02,563 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-22 15:51:02,580 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:51:02,582 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 27 [2018-10-22 15:51:02,583 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:51:02,627 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:02,638 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:02,639 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:11 [2018-10-22 15:51:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:03,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:03,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 29 [2018-10-22 15:51:03,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:51:03,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:51:03,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:51:03,017 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 29 states. [2018-10-22 15:51:04,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:04,151 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-10-22 15:51:04,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-22 15:51:04,151 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2018-10-22 15:51:04,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:04,153 INFO L225 Difference]: With dead ends: 76 [2018-10-22 15:51:04,153 INFO L226 Difference]: Without dead ends: 74 [2018-10-22 15:51:04,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=237, Invalid=1925, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:51:04,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-22 15:51:04,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2018-10-22 15:51:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-22 15:51:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-10-22 15:51:04,173 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 64 [2018-10-22 15:51:04,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:04,174 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-10-22 15:51:04,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:51:04,174 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-10-22 15:51:04,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-22 15:51:04,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:04,175 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:04,176 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:04,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:04,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1873891260, now seen corresponding path program 11 times [2018-10-22 15:51:04,176 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:04,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:04,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:04,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:04,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 75 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:05,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:05,345 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:05,356 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:05,425 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-22 15:51:05,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:05,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:05,583 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-22 15:51:05,585 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-22 15:51:05,585 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:51:05,587 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:05,612 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:05,612 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2018-10-22 15:51:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:06,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:06,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2018-10-22 15:51:06,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 15:51:06,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 15:51:06,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:51:06,030 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 41 states. [2018-10-22 15:51:09,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:09,074 INFO L93 Difference]: Finished difference Result 131 states and 135 transitions. [2018-10-22 15:51:09,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-22 15:51:09,075 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 69 [2018-10-22 15:51:09,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:09,075 INFO L225 Difference]: With dead ends: 131 [2018-10-22 15:51:09,075 INFO L226 Difference]: Without dead ends: 83 [2018-10-22 15:51:09,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=576, Invalid=4680, Unknown=0, NotChecked=0, Total=5256 [2018-10-22 15:51:09,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-22 15:51:09,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2018-10-22 15:51:09,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-22 15:51:09,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-10-22 15:51:09,089 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 69 [2018-10-22 15:51:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:09,090 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-10-22 15:51:09,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 15:51:09,090 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-10-22 15:51:09,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-22 15:51:09,091 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:09,091 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:09,091 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:09,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:09,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1304919825, now seen corresponding path program 12 times [2018-10-22 15:51:09,092 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:09,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:09,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:09,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:09,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 105 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:09,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:09,860 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:09,868 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:09,973 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-22 15:51:09,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:09,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:10,020 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:51:10,022 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:51:10,023 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:51:10,025 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:10,030 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:10,030 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2018-10-22 15:51:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 156 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:11,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:11,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 40 [2018-10-22 15:51:11,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:51:11,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:51:11,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:51:11,914 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 40 states. [2018-10-22 15:51:13,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:13,681 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2018-10-22 15:51:13,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-22 15:51:13,682 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 77 [2018-10-22 15:51:13,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:13,683 INFO L225 Difference]: With dead ends: 130 [2018-10-22 15:51:13,683 INFO L226 Difference]: Without dead ends: 82 [2018-10-22 15:51:13,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=970, Invalid=4730, Unknown=0, NotChecked=0, Total=5700 [2018-10-22 15:51:13,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-22 15:51:13,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2018-10-22 15:51:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-22 15:51:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-22 15:51:13,698 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 77 [2018-10-22 15:51:13,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:13,698 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-22 15:51:13,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:51:13,698 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-22 15:51:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-22 15:51:13,699 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:13,699 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:13,700 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:13,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:13,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1321581482, now seen corresponding path program 13 times [2018-10-22 15:51:13,700 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:13,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:13,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:13,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:13,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:14,169 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 319 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:14,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:14,169 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:14,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:14,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:14,252 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:51:14,254 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:51:14,254 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:51:14,258 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:14,268 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:14,268 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-10-22 15:51:14,322 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-22 15:51:14,324 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:51:14,327 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 27 [2018-10-22 15:51:14,327 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:51:14,333 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:14,342 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:14,342 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:11 [2018-10-22 15:51:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 319 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:14,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:14,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 35 [2018-10-22 15:51:14,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:51:14,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:51:14,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1097, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:51:14,805 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 35 states. [2018-10-22 15:51:16,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:16,190 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2018-10-22 15:51:16,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-22 15:51:16,190 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 80 [2018-10-22 15:51:16,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:16,191 INFO L225 Difference]: With dead ends: 92 [2018-10-22 15:51:16,191 INFO L226 Difference]: Without dead ends: 90 [2018-10-22 15:51:16,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=287, Invalid=2905, Unknown=0, NotChecked=0, Total=3192 [2018-10-22 15:51:16,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-22 15:51:16,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2018-10-22 15:51:16,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-22 15:51:16,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-10-22 15:51:16,203 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 80 [2018-10-22 15:51:16,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:16,204 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-10-22 15:51:16,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:51:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-10-22 15:51:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-22 15:51:16,205 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:16,205 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:16,205 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:16,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:16,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1266314788, now seen corresponding path program 14 times [2018-10-22 15:51:16,206 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:16,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:16,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:16,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:16,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 140 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:17,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:17,074 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:17,082 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:17,140 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:17,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:17,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:17,165 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:51:17,167 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:51:17,168 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:51:17,171 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:17,177 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:17,177 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2018-10-22 15:51:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 190 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:17,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:17,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 43 [2018-10-22 15:51:17,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-22 15:51:17,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-22 15:51:17,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:51:17,869 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 43 states. [2018-10-22 15:51:18,967 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2018-10-22 15:51:20,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:20,602 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2018-10-22 15:51:20,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-22 15:51:20,603 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2018-10-22 15:51:20,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:20,604 INFO L225 Difference]: With dead ends: 143 [2018-10-22 15:51:20,604 INFO L226 Difference]: Without dead ends: 90 [2018-10-22 15:51:20,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1883 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1208, Invalid=5434, Unknown=0, NotChecked=0, Total=6642 [2018-10-22 15:51:20,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-22 15:51:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-10-22 15:51:20,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-22 15:51:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-22 15:51:20,622 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 85 [2018-10-22 15:51:20,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:20,623 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-22 15:51:20,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-22 15:51:20,623 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-22 15:51:20,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-22 15:51:20,624 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:20,624 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:20,624 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:20,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:20,625 INFO L82 PathProgramCache]: Analyzing trace with hash 634733089, now seen corresponding path program 15 times [2018-10-22 15:51:20,625 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:20,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:20,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:20,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:20,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 0 proven. 394 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:21,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:21,144 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:21,152 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:21,287 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-22 15:51:21,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:21,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:21,300 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:51:21,302 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:51:21,303 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:51:21,307 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:21,315 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:21,316 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-10-22 15:51:21,415 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-22 15:51:21,432 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:51:21,434 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 27 [2018-10-22 15:51:21,434 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:51:21,441 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:21,450 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:21,450 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:11 [2018-10-22 15:51:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 0 proven. 394 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:21,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:21,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 38 [2018-10-22 15:51:21,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-22 15:51:21,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-22 15:51:21,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:51:21,860 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 38 states. [2018-10-22 15:51:23,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:23,546 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2018-10-22 15:51:23,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-22 15:51:23,546 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 88 [2018-10-22 15:51:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:23,547 INFO L225 Difference]: With dead ends: 100 [2018-10-22 15:51:23,547 INFO L226 Difference]: Without dead ends: 98 [2018-10-22 15:51:23,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=312, Invalid=3470, Unknown=0, NotChecked=0, Total=3782 [2018-10-22 15:51:23,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-22 15:51:23,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2018-10-22 15:51:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-22 15:51:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-10-22 15:51:23,562 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 88 [2018-10-22 15:51:23,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:23,562 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-10-22 15:51:23,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-22 15:51:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-10-22 15:51:23,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-22 15:51:23,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:23,563 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:23,563 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:23,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:23,564 INFO L82 PathProgramCache]: Analyzing trace with hash 615021297, now seen corresponding path program 16 times [2018-10-22 15:51:23,564 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:23,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:23,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:23,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:23,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 180 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:24,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:24,361 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:24,371 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:24,477 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:24,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:24,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:24,671 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-22 15:51:24,673 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-22 15:51:24,674 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:51:24,679 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:24,680 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:24,681 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2018-10-22 15:51:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:25,120 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:25,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 52 [2018-10-22 15:51:25,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-22 15:51:25,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-22 15:51:25,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=2347, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:51:25,122 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 52 states. [2018-10-22 15:51:28,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:28,715 INFO L93 Difference]: Finished difference Result 170 states and 174 transitions. [2018-10-22 15:51:28,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-22 15:51:28,715 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 93 [2018-10-22 15:51:28,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:28,716 INFO L225 Difference]: With dead ends: 170 [2018-10-22 15:51:28,716 INFO L226 Difference]: Without dead ends: 107 [2018-10-22 15:51:28,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=825, Invalid=7731, Unknown=0, NotChecked=0, Total=8556 [2018-10-22 15:51:28,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-22 15:51:28,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2018-10-22 15:51:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-22 15:51:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-10-22 15:51:28,735 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 93 [2018-10-22 15:51:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:28,735 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-10-22 15:51:28,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-22 15:51:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-10-22 15:51:28,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-22 15:51:28,735 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:28,736 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:28,736 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:28,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:28,736 INFO L82 PathProgramCache]: Analyzing trace with hash 645786620, now seen corresponding path program 17 times [2018-10-22 15:51:28,736 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:28,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:28,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:28,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:28,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 225 proven. 305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:29,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:29,570 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:29,579 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:29,850 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-22 15:51:29,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:29,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:30,129 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-22 15:51:30,135 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-22 15:51:30,135 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:51:30,142 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:30,145 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:30,145 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2018-10-22 15:51:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 0 proven. 530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:30,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:30,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28] total 57 [2018-10-22 15:51:30,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-22 15:51:30,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-22 15:51:30,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2827, Unknown=0, NotChecked=0, Total=3192 [2018-10-22 15:51:30,753 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 57 states. [2018-10-22 15:51:35,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:35,118 INFO L93 Difference]: Finished difference Result 183 states and 187 transitions. [2018-10-22 15:51:35,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-22 15:51:35,119 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 101 [2018-10-22 15:51:35,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:35,119 INFO L225 Difference]: With dead ends: 183 [2018-10-22 15:51:35,120 INFO L226 Difference]: Without dead ends: 115 [2018-10-22 15:51:35,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3053 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=938, Invalid=9162, Unknown=0, NotChecked=0, Total=10100 [2018-10-22 15:51:35,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-22 15:51:35,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2018-10-22 15:51:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-22 15:51:35,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2018-10-22 15:51:35,138 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 101 [2018-10-22 15:51:35,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:35,138 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2018-10-22 15:51:35,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-22 15:51:35,138 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2018-10-22 15:51:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-22 15:51:35,139 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:35,139 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:35,139 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:35,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:35,140 INFO L82 PathProgramCache]: Analyzing trace with hash 505437905, now seen corresponding path program 18 times [2018-10-22 15:51:35,140 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:35,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:35,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:35,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:35,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 275 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:37,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:37,418 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:37,432 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:37,774 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-22 15:51:37,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:37,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:37,857 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:51:37,871 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:51:37,872 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:51:37,895 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:37,918 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:37,918 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2018-10-22 15:51:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 354 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:38,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:38,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 51 [2018-10-22 15:51:38,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-22 15:51:38,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-22 15:51:38,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=2084, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 15:51:38,941 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 51 states. [2018-10-22 15:51:41,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:41,225 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2018-10-22 15:51:41,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-22 15:51:41,226 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 109 [2018-10-22 15:51:41,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:41,228 INFO L225 Difference]: With dead ends: 184 [2018-10-22 15:51:41,228 INFO L226 Difference]: Without dead ends: 114 [2018-10-22 15:51:41,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3128 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1766, Invalid=8740, Unknown=0, NotChecked=0, Total=10506 [2018-10-22 15:51:41,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-22 15:51:41,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-10-22 15:51:41,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-22 15:51:41,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-22 15:51:41,249 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 109 [2018-10-22 15:51:41,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:41,249 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-22 15:51:41,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-22 15:51:41,249 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-22 15:51:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-22 15:51:41,249 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:41,250 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:41,250 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:41,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:41,250 INFO L82 PathProgramCache]: Analyzing trace with hash 677695510, now seen corresponding path program 19 times [2018-10-22 15:51:41,250 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:41,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:41,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:41,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:41,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 0 proven. 667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:42,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:42,024 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:42,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:42,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:42,134 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:51:42,136 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:51:42,136 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:51:42,140 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:42,148 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:42,148 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-10-22 15:51:42,226 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-22 15:51:42,229 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:51:42,233 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 27 [2018-10-22 15:51:42,233 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:51:42,244 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:42,254 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:42,255 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:11 [2018-10-22 15:51:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 0 proven. 667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:42,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:42,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 47 [2018-10-22 15:51:42,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-22 15:51:42,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-22 15:51:42,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2037, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:51:42,899 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 47 states. [2018-10-22 15:51:45,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:45,124 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2018-10-22 15:51:45,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-22 15:51:45,126 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 112 [2018-10-22 15:51:45,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:45,127 INFO L225 Difference]: With dead ends: 124 [2018-10-22 15:51:45,127 INFO L226 Difference]: Without dead ends: 122 [2018-10-22 15:51:45,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=387, Invalid=5465, Unknown=0, NotChecked=0, Total=5852 [2018-10-22 15:51:45,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-22 15:51:45,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2018-10-22 15:51:45,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-22 15:51:45,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-10-22 15:51:45,153 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 112 [2018-10-22 15:51:45,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:45,154 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-10-22 15:51:45,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-22 15:51:45,154 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-10-22 15:51:45,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-22 15:51:45,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:45,155 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:45,155 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:45,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:45,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1596170724, now seen corresponding path program 20 times [2018-10-22 15:51:45,155 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:45,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:45,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:45,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:45,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 330 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:46,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:46,263 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:46,270 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:46,350 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:46,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:46,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:46,403 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:51:46,405 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:51:46,405 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:51:46,409 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:46,415 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:46,415 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2018-10-22 15:51:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 404 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:47,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:47,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 55 [2018-10-22 15:51:47,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-22 15:51:47,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-22 15:51:47,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=2422, Unknown=0, NotChecked=0, Total=2970 [2018-10-22 15:51:47,484 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 55 states. [2018-10-22 15:51:50,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:50,510 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2018-10-22 15:51:50,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-22 15:51:50,510 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 117 [2018-10-22 15:51:50,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:50,511 INFO L225 Difference]: With dead ends: 195 [2018-10-22 15:51:50,511 INFO L226 Difference]: Without dead ends: 122 [2018-10-22 15:51:50,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3519 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2124, Invalid=9866, Unknown=0, NotChecked=0, Total=11990 [2018-10-22 15:51:50,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-22 15:51:50,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2018-10-22 15:51:50,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-22 15:51:50,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-10-22 15:51:50,539 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 117 [2018-10-22 15:51:50,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:50,539 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-10-22 15:51:50,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-22 15:51:50,540 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-10-22 15:51:50,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-22 15:51:50,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:50,541 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:50,541 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:50,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:50,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1385282145, now seen corresponding path program 21 times [2018-10-22 15:51:50,541 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:50,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:50,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:50,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:50,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:51,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:51,375 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:51,383 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:51,678 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-22 15:51:51,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:51,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:52,213 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:51:52,216 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:51:52,216 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:51:52,218 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:52,222 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:52,223 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-10-22 15:51:52,322 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2018-10-22 15:51:52,324 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:51:52,326 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 23 [2018-10-22 15:51:52,326 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:51:52,332 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:52,344 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:52,344 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:13 [2018-10-22 15:51:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:53,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:53,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 67 [2018-10-22 15:51:53,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-22 15:51:53,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-22 15:51:53,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=4218, Unknown=0, NotChecked=0, Total=4422 [2018-10-22 15:51:53,565 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 67 states. [2018-10-22 15:51:56,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:56,497 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2018-10-22 15:51:56,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-22 15:51:56,497 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 120 [2018-10-22 15:51:56,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:56,498 INFO L225 Difference]: With dead ends: 132 [2018-10-22 15:51:56,499 INFO L226 Difference]: Without dead ends: 130 [2018-10-22 15:51:56,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2101 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=550, Invalid=9152, Unknown=0, NotChecked=0, Total=9702 [2018-10-22 15:51:56,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-22 15:51:56,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2018-10-22 15:51:56,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-22 15:51:56,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2018-10-22 15:51:56,528 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 120 [2018-10-22 15:51:56,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:56,529 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2018-10-22 15:51:56,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-22 15:51:56,529 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2018-10-22 15:51:56,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-22 15:51:56,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:56,530 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:56,530 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:56,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:56,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1070781775, now seen corresponding path program 22 times [2018-10-22 15:51:56,530 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:56,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:56,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:56,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:56,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 390 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:57,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:57,582 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:57,590 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:58,042 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:58,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:58,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:58,348 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-22 15:51:58,350 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-22 15:51:58,350 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:51:58,357 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:58,358 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:51:58,358 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2018-10-22 15:51:59,345 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 842 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:59,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:59,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 34] total 68 [2018-10-22 15:51:59,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-22 15:51:59,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-22 15:51:59,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=4057, Unknown=0, NotChecked=0, Total=4556 [2018-10-22 15:51:59,369 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 68 states. [2018-10-22 15:52:04,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:04,055 INFO L93 Difference]: Finished difference Result 222 states and 226 transitions. [2018-10-22 15:52:04,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-22 15:52:04,055 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 125 [2018-10-22 15:52:04,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:04,057 INFO L225 Difference]: With dead ends: 222 [2018-10-22 15:52:04,057 INFO L226 Difference]: Without dead ends: 139 [2018-10-22 15:52:04,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4449 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1185, Invalid=13335, Unknown=0, NotChecked=0, Total=14520 [2018-10-22 15:52:04,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-22 15:52:04,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 134. [2018-10-22 15:52:04,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-22 15:52:04,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2018-10-22 15:52:04,082 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 125 [2018-10-22 15:52:04,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:04,082 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2018-10-22 15:52:04,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-22 15:52:04,082 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2018-10-22 15:52:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-22 15:52:04,083 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:04,083 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:04,083 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:04,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:04,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1415768124, now seen corresponding path program 23 times [2018-10-22 15:52:04,084 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:04,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:04,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:04,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:04,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 455 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:05,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:05,248 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:52:05,258 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:52:05,638 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-10-22 15:52:05,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:05,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:06,206 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-22 15:52:06,209 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-22 15:52:06,209 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:52:06,218 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:52:06,221 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:52:06,222 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2018-10-22 15:52:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:07,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:07,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 36] total 73 [2018-10-22 15:52:07,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-22 15:52:07,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-22 15:52:07,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=4681, Unknown=0, NotChecked=0, Total=5256 [2018-10-22 15:52:07,131 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 73 states. [2018-10-22 15:52:12,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:12,767 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2018-10-22 15:52:12,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-22 15:52:12,767 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 133 [2018-10-22 15:52:12,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:12,768 INFO L225 Difference]: With dead ends: 235 [2018-10-22 15:52:12,768 INFO L226 Difference]: Without dead ends: 147 [2018-10-22 15:52:12,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5115 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1380, Invalid=15132, Unknown=0, NotChecked=0, Total=16512 [2018-10-22 15:52:12,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-22 15:52:12,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2018-10-22 15:52:12,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-22 15:52:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2018-10-22 15:52:12,802 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 133 [2018-10-22 15:52:12,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:12,803 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2018-10-22 15:52:12,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-22 15:52:12,803 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2018-10-22 15:52:12,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-22 15:52:12,804 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:12,804 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:12,804 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:12,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:12,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1421025647, now seen corresponding path program 24 times [2018-10-22 15:52:12,804 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:12,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:12,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:12,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:12,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 525 proven. 565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:14,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:14,107 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:52:14,117 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:52:14,614 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-10-22 15:52:14,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:14,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:14,695 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:52:14,697 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:52:14,697 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:52:14,698 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:52:14,702 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:52:14,702 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2018-10-22 15:52:14,774 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2018-10-22 15:52:14,778 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2018-10-22 15:52:14,779 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:52:14,784 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:52:14,793 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-22 15:52:14,793 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:35, output treesize:31 [2018-10-22 15:52:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 632 proven. 458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:16,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:16,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 66 [2018-10-22 15:52:16,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-22 15:52:16,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-22 15:52:16,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=3485, Unknown=0, NotChecked=0, Total=4290 [2018-10-22 15:52:16,759 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 66 states. [2018-10-22 15:52:18,075 WARN L179 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2018-10-22 15:52:19,404 WARN L179 SmtUtils]: Spent 901.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2018-10-22 15:52:20,171 WARN L179 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2018-10-22 15:52:21,179 WARN L179 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2018-10-22 15:52:22,214 WARN L179 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2018-10-22 15:52:23,454 WARN L179 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2018-10-22 15:52:23,881 WARN L179 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2018-10-22 15:52:25,257 WARN L179 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2018-10-22 15:52:25,595 WARN L179 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2018-10-22 15:52:27,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:27,263 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2018-10-22 15:52:27,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-22 15:52:27,263 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 141 [2018-10-22 15:52:27,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:27,264 INFO L225 Difference]: With dead ends: 234 [2018-10-22 15:52:27,265 INFO L226 Difference]: Without dead ends: 146 [2018-10-22 15:52:27,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5088 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=2983, Invalid=14047, Unknown=0, NotChecked=0, Total=17030 [2018-10-22 15:52:27,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-22 15:52:27,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2018-10-22 15:52:27,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-22 15:52:27,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-10-22 15:52:27,295 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 141 [2018-10-22 15:52:27,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:27,296 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-10-22 15:52:27,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-22 15:52:27,296 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-10-22 15:52:27,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-22 15:52:27,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:27,297 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:27,297 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:27,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:27,298 INFO L82 PathProgramCache]: Analyzing trace with hash -894239786, now seen corresponding path program 25 times [2018-10-22 15:52:27,298 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:27,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:27,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:27,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:27,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 1143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:28,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:28,849 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:52:28,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:28,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:28,970 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:52:28,973 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:52:28,974 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:52:28,977 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:52:28,986 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:52:28,986 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-10-22 15:52:29,083 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-22 15:52:29,087 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:52:29,088 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 27 [2018-10-22 15:52:29,089 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:52:29,095 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:52:29,104 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:52:29,104 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:11 [2018-10-22 15:52:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 1143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:30,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:30,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 59 [2018-10-22 15:52:30,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-22 15:52:30,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-22 15:52:30,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3265, Unknown=0, NotChecked=0, Total=3422 [2018-10-22 15:52:30,317 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 59 states. [2018-10-22 15:52:34,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:34,146 INFO L93 Difference]: Finished difference Result 156 states and 157 transitions. [2018-10-22 15:52:34,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-22 15:52:34,146 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 144 [2018-10-22 15:52:34,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:34,148 INFO L225 Difference]: With dead ends: 156 [2018-10-22 15:52:34,148 INFO L226 Difference]: Without dead ends: 154 [2018-10-22 15:52:34,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=487, Invalid=8825, Unknown=0, NotChecked=0, Total=9312 [2018-10-22 15:52:34,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-22 15:52:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2018-10-22 15:52:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-22 15:52:34,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2018-10-22 15:52:34,180 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 144 [2018-10-22 15:52:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:34,181 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2018-10-22 15:52:34,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-22 15:52:34,181 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2018-10-22 15:52:34,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-22 15:52:34,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:34,182 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:34,182 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:34,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:34,182 INFO L82 PathProgramCache]: Analyzing trace with hash -413955492, now seen corresponding path program 26 times [2018-10-22 15:52:34,182 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:34,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:34,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:34,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:34,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 600 proven. 626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:35,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:35,891 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:52:35,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:52:36,007 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:52:36,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:36,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:36,459 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-22 15:52:36,461 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-22 15:52:36,461 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:52:36,463 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:52:36,464 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:52:36,464 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2018-10-22 15:52:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 0 proven. 1226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:37,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:37,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41] total 81 [2018-10-22 15:52:37,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-22 15:52:37,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-22 15:52:37,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=5800, Unknown=0, NotChecked=0, Total=6480 [2018-10-22 15:52:37,562 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 81 states. [2018-10-22 15:52:44,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:44,015 INFO L93 Difference]: Finished difference Result 261 states and 265 transitions. [2018-10-22 15:52:44,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-22 15:52:44,015 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 149 [2018-10-22 15:52:44,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:44,016 INFO L225 Difference]: With dead ends: 261 [2018-10-22 15:52:44,017 INFO L226 Difference]: Without dead ends: 163 [2018-10-22 15:52:44,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6549 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1576, Invalid=19304, Unknown=0, NotChecked=0, Total=20880 [2018-10-22 15:52:44,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-22 15:52:44,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 158. [2018-10-22 15:52:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-22 15:52:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2018-10-22 15:52:44,060 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 149 [2018-10-22 15:52:44,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:44,061 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2018-10-22 15:52:44,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-22 15:52:44,061 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2018-10-22 15:52:44,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-22 15:52:44,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:44,062 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:44,062 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:44,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:44,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2055043697, now seen corresponding path program 27 times [2018-10-22 15:52:44,062 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:44,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:44,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:44,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:44,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 680 proven. 690 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:46,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:46,399 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:52:46,407 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:52:47,751 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-10-22 15:52:47,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:47,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:48,228 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:52:48,242 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:52:48,242 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:52:48,265 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:52:48,345 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:52:48,346 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2018-10-22 15:52:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 801 proven. 569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:50,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:50,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 69 [2018-10-22 15:52:50,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-22 15:52:50,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-22 15:52:50,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=892, Invalid=3800, Unknown=0, NotChecked=0, Total=4692 [2018-10-22 15:52:50,770 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand 69 states. [2018-10-22 15:52:54,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:54,601 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2018-10-22 15:52:54,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-22 15:52:54,601 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 157 [2018-10-22 15:52:54,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:54,603 INFO L225 Difference]: With dead ends: 262 [2018-10-22 15:52:54,604 INFO L226 Difference]: Without dead ends: 162 [2018-10-22 15:52:54,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6386 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=3470, Invalid=17410, Unknown=0, NotChecked=0, Total=20880 [2018-10-22 15:52:54,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-22 15:52:54,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2018-10-22 15:52:54,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-22 15:52:54,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-10-22 15:52:54,642 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 157 [2018-10-22 15:52:54,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:54,642 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-10-22 15:52:54,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-22 15:52:54,643 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-10-22 15:52:54,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-22 15:52:54,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:54,644 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:54,644 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:54,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:54,644 INFO L82 PathProgramCache]: Analyzing trace with hash 164785590, now seen corresponding path program 28 times [2018-10-22 15:52:54,644 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:54,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:54,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:54,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:54,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 0 proven. 1429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:56,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:56,431 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:52:56,441 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:52:57,242 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:52:57,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:57,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:57,259 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:52:57,262 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:52:57,262 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:52:57,266 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:52:57,275 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:52:57,275 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-10-22 15:52:57,368 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-22 15:52:57,371 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:52:57,373 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 27 [2018-10-22 15:52:57,373 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:52:57,379 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:52:57,389 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:52:57,389 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:11 [2018-10-22 15:52:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 0 proven. 1429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:58,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:58,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 65 [2018-10-22 15:52:58,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-22 15:52:58,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-22 15:52:58,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3987, Unknown=0, NotChecked=0, Total=4160 [2018-10-22 15:52:58,591 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 65 states. [2018-10-22 15:53:03,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:03,523 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2018-10-22 15:53:03,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-22 15:53:03,523 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 160 [2018-10-22 15:53:03,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:03,524 INFO L225 Difference]: With dead ends: 172 [2018-10-22 15:53:03,524 INFO L226 Difference]: Without dead ends: 170 [2018-10-22 15:53:03,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 138 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2021 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=537, Invalid=10805, Unknown=0, NotChecked=0, Total=11342 [2018-10-22 15:53:03,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-22 15:53:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 166. [2018-10-22 15:53:03,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-22 15:53:03,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2018-10-22 15:53:03,563 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 160 [2018-10-22 15:53:03,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:03,563 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2018-10-22 15:53:03,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-22 15:53:03,563 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2018-10-22 15:53:03,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-22 15:53:03,564 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:03,564 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:03,564 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:03,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:03,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1787804548, now seen corresponding path program 29 times [2018-10-22 15:53:03,565 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:03,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:03,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:03,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:03,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:04,766 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-10-22 15:53:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1522 backedges. 765 proven. 757 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:05,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:05,973 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:53:05,981 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:53:06,573 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2018-10-22 15:53:06,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:06,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:07,267 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-22 15:53:07,269 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-22 15:53:07,270 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:53:07,282 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:53:07,290 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:53:07,291 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2018-10-22 15:53:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1522 backedges. 0 proven. 1522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:08,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:08,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 44] total 89 [2018-10-22 15:53:08,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-22 15:53:08,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-22 15:53:08,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=833, Invalid=6999, Unknown=0, NotChecked=0, Total=7832 [2018-10-22 15:53:08,555 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 89 states. [2018-10-22 15:53:15,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:15,167 INFO L93 Difference]: Finished difference Result 287 states and 291 transitions. [2018-10-22 15:53:15,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-22 15:53:15,167 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 165 [2018-10-22 15:53:15,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:15,168 INFO L225 Difference]: With dead ends: 287 [2018-10-22 15:53:15,169 INFO L226 Difference]: Without dead ends: 179 [2018-10-22 15:53:15,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7744 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1824, Invalid=22668, Unknown=0, NotChecked=0, Total=24492 [2018-10-22 15:53:15,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-22 15:53:15,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 174. [2018-10-22 15:53:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-10-22 15:53:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2018-10-22 15:53:15,218 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 165 [2018-10-22 15:53:15,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:15,218 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2018-10-22 15:53:15,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-22 15:53:15,219 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2018-10-22 15:53:15,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-22 15:53:15,220 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:15,220 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:15,220 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:15,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:15,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1556283823, now seen corresponding path program 30 times [2018-10-22 15:53:15,220 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:15,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:15,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:15,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:15,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 855 proven. 827 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:18,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:18,571 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:53:18,578 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:53:21,188 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-22 15:53:21,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:21,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:21,592 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:53:21,593 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:53:21,593 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:53:21,595 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:53:21,601 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:53:21,602 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-10-22 15:53:21,684 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2018-10-22 15:53:21,686 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2018-10-22 15:53:21,686 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:53:21,691 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:53:21,698 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-22 15:53:21,698 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2018-10-22 15:53:21,801 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2018-10-22 15:53:21,812 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 23 [2018-10-22 15:53:21,813 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-22 15:53:21,827 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:53:21,847 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:53:21,847 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:29 [2018-10-22 15:53:21,964 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2018-10-22 15:53:21,976 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 31 [2018-10-22 15:53:21,977 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-22 15:53:21,994 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:53:22,028 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 19 [2018-10-22 15:53:22,031 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:53:22,031 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:53:22,037 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:53:22,062 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 3 xjuncts. [2018-10-22 15:53:22,062 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:54, output treesize:37 [2018-10-22 15:53:22,163 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2018-10-22 15:53:22,175 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 23 [2018-10-22 15:53:22,176 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-22 15:53:22,193 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:53:22,232 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 22 [2018-10-22 15:53:22,234 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-10-22 15:53:22,235 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:53:22,241 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:53:22,274 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 3 xjuncts. [2018-10-22 15:53:22,275 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:60, output treesize:33 [2018-10-22 15:53:22,373 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2018-10-22 15:53:22,386 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 23 [2018-10-22 15:53:22,387 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-22 15:53:22,404 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:53:22,443 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 22 [2018-10-22 15:53:22,445 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-10-22 15:53:22,445 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:53:22,453 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:53:22,485 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 3 xjuncts. [2018-10-22 15:53:22,485 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:60, output treesize:33 [2018-10-22 15:53:22,585 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 19 [2018-10-22 15:53:22,587 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:53:22,587 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:53:22,592 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:53:22,615 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2018-10-22 15:53:22,635 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 31 [2018-10-22 15:53:22,636 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2018-10-22 15:53:22,651 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:53:22,678 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 3 xjuncts. [2018-10-22 15:53:22,678 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:54, output treesize:37 [2018-10-22 15:53:22,785 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2018-10-22 15:53:22,788 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2018-10-22 15:53:22,788 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:53:22,797 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:53:22,820 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 19 [2018-10-22 15:53:22,821 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:53:22,822 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:53:22,828 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:53:22,846 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:53:22,846 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:54, output treesize:46 [2018-10-22 15:53:25,107 WARN L179 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 40 [2018-10-22 15:53:27,317 WARN L179 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 41 [2018-10-22 15:53:29,731 WARN L179 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 41 [2018-10-22 15:53:31,103 WARN L179 SmtUtils]: Spent 994.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2018-10-22 15:53:31,977 WARN L179 SmtUtils]: Spent 615.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2018-10-22 15:53:32,487 WARN L179 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2018-10-22 15:53:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 87 proven. 1595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:33,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:33,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 52] total 99 [2018-10-22 15:53:33,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-22 15:53:33,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-22 15:53:33,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1374, Invalid=8328, Unknown=0, NotChecked=0, Total=9702 [2018-10-22 15:53:33,696 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 99 states. [2018-10-22 15:53:37,924 WARN L179 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2018-10-22 15:53:39,004 WARN L179 SmtUtils]: Spent 952.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2018-10-22 15:53:40,185 WARN L179 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2018-10-22 15:53:40,383 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2018-10-22 15:53:40,545 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2018-10-22 15:53:41,370 WARN L179 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2018-10-22 15:53:41,605 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-22 15:53:41,846 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-22 15:53:43,378 WARN L179 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2018-10-22 15:53:43,678 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2018-10-22 15:53:46,790 WARN L179 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-22 15:53:47,079 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-10-22 15:53:47,321 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2018-10-22 15:53:47,615 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-22 15:53:47,851 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2018-10-22 15:53:50,222 WARN L179 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-10-22 15:53:50,468 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2018-10-22 15:53:51,557 WARN L179 SmtUtils]: Spent 920.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2018-10-22 15:53:52,131 WARN L179 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-22 15:53:52,691 WARN L179 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2018-10-22 15:53:52,947 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-22 15:53:53,244 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-10-22 15:53:53,485 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2018-10-22 15:53:53,790 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-10-22 15:53:54,036 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2018-10-22 15:53:54,491 WARN L179 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2018-10-22 15:53:54,749 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-22 15:53:57,055 WARN L179 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2018-10-22 15:53:57,919 WARN L179 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-22 15:53:58,226 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2018-10-22 15:53:58,680 WARN L179 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-10-22 15:53:58,985 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-10-22 15:54:00,373 WARN L179 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2018-10-22 15:54:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:21,424 INFO L93 Difference]: Finished difference Result 288 states and 290 transitions. [2018-10-22 15:54:21,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-22 15:54:21,424 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 173 [2018-10-22 15:54:21,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:21,426 INFO L225 Difference]: With dead ends: 288 [2018-10-22 15:54:21,426 INFO L226 Difference]: Without dead ends: 178 [2018-10-22 15:54:21,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 119 SyntacticMatches, 6 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12062 ImplicationChecksByTransitivity, 57.3s TimeCoverageRelationStatistics Valid=3575, Invalid=29725, Unknown=6, NotChecked=0, Total=33306 [2018-10-22 15:54:21,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-10-22 15:54:21,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2018-10-22 15:54:21,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-22 15:54:21,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-10-22 15:54:21,476 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 173 [2018-10-22 15:54:21,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:21,476 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-10-22 15:54:21,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-22 15:54:21,476 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-10-22 15:54:21,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-22 15:54:21,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:21,477 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:21,478 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:21,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:21,478 INFO L82 PathProgramCache]: Analyzing trace with hash 102025110, now seen corresponding path program 31 times [2018-10-22 15:54:21,478 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:21,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:21,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:21,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:54:21,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 0 proven. 1747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:23,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:54:23,306 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:54:23,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:54:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:23,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:23,445 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:54:23,448 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:54:23,449 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:54:23,453 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:54:23,461 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:54:23,461 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-10-22 15:54:23,552 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-22 15:54:23,555 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:54:23,557 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 27 [2018-10-22 15:54:23,557 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:54:23,564 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:54:23,572 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:54:23,572 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:11 [2018-10-22 15:54:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 0 proven. 1747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:24,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:54:24,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 71 [2018-10-22 15:54:24,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-22 15:54:24,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-22 15:54:24,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=4781, Unknown=0, NotChecked=0, Total=4970 [2018-10-22 15:54:24,954 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 71 states. [2018-10-22 15:54:30,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:30,366 INFO L93 Difference]: Finished difference Result 188 states and 189 transitions. [2018-10-22 15:54:30,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-22 15:54:30,367 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 176 [2018-10-22 15:54:30,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:30,368 INFO L225 Difference]: With dead ends: 188 [2018-10-22 15:54:30,368 INFO L226 Difference]: Without dead ends: 186 [2018-10-22 15:54:30,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 152 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=587, Invalid=12985, Unknown=0, NotChecked=0, Total=13572 [2018-10-22 15:54:30,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-22 15:54:30,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 182. [2018-10-22 15:54:30,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-22 15:54:30,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2018-10-22 15:54:30,404 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 176 [2018-10-22 15:54:30,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:30,405 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2018-10-22 15:54:30,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-22 15:54:30,405 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2018-10-22 15:54:30,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-22 15:54:30,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:30,406 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:30,406 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:30,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:30,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1341855388, now seen corresponding path program 32 times [2018-10-22 15:54:30,406 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:30,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:30,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:30,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:54:30,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:32,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 950 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:32,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:54:32,397 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:54:32,404 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:54:32,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:54:32,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:54:32,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:33,119 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-22 15:54:33,122 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-22 15:54:33,122 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:54:33,124 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:54:33,125 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:54:33,125 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2018-10-22 15:54:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 0 proven. 1850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:34,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:54:34,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 49] total 97 [2018-10-22 15:54:34,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-22 15:54:34,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-22 15:54:34,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=958, Invalid=8354, Unknown=0, NotChecked=0, Total=9312 [2018-10-22 15:54:34,566 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 97 states. [2018-10-22 15:54:41,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:41,677 INFO L93 Difference]: Finished difference Result 313 states and 317 transitions. [2018-10-22 15:54:41,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-10-22 15:54:41,678 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 181 [2018-10-22 15:54:41,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:41,679 INFO L225 Difference]: With dead ends: 313 [2018-10-22 15:54:41,679 INFO L226 Difference]: Without dead ends: 195 [2018-10-22 15:54:41,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9447 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=2118, Invalid=27638, Unknown=0, NotChecked=0, Total=29756 [2018-10-22 15:54:41,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-22 15:54:41,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 190. [2018-10-22 15:54:41,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-10-22 15:54:41,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2018-10-22 15:54:41,721 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 181 [2018-10-22 15:54:41,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:41,721 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2018-10-22 15:54:41,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-22 15:54:41,722 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2018-10-22 15:54:41,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-10-22 15:54:41,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:41,722 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:41,723 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:41,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:41,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1435068977, now seen corresponding path program 33 times [2018-10-22 15:54:41,723 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:41,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:41,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:41,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:54:41,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 1050 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:43,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:54:43,535 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:54:43,542 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... [2018-10-22 15:54:48,143 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-22 15:54:48,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:54:48,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:48,159 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-22 15:54:48,359 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:54:48,360 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 15:54:48,363 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 15:54:48,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:54:48 BoogieIcfgContainer [2018-10-22 15:54:48,364 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:54:48,365 INFO L168 Benchmark]: Toolchain (without parser) took 249855.92 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 883.9 MB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -194.3 MB). Peak memory consumption was 689.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:54:48,365 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:54:48,365 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:54:48,366 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:54:48,366 INFO L168 Benchmark]: Boogie Preprocessor took 25.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:54:48,366 INFO L168 Benchmark]: RCFGBuilder took 439.04 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 734.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -769.4 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. [2018-10-22 15:54:48,366 INFO L168 Benchmark]: TraceAbstraction took 249065.95 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 149.9 MB). Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 564.5 MB). Peak memory consumption was 714.4 MB. Max. memory is 7.1 GB. [2018-10-22 15:54:48,368 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 277.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 439.04 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 734.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -769.4 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 249065.95 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 149.9 MB). Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 564.5 MB). Peak memory consumption was 714.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 6]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 6). Cancelled while BasicCegarLoop was analyzing trace of length 190 with TraceHistMax 24,while TraceCheckSpWp was constructing forward predicates,while XnfDer was eliminating 2 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. TIMEOUT Result, 248.9s OverallTime, 36 OverallIterations, 24 TraceHistogramMax, 149.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1513 SDtfs, 5115 SDslu, 43928 SDs, 0 SdLazy, 52615 SolverSat, 3626 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 39.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5408 GetRequests, 2552 SyntacticMatches, 55 SemanticMatches, 2801 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89073 ImplicationChecksByTransitivity, 173.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=190occurred in iteration=35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 35 MinimizatonAttempts, 131 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 9.4s SatisfiabilityAnalysisTime, 79.6s InterpolantComputationTime, 6371 NumberOfCodeBlocks, 6371 NumberOfCodeBlocksAsserted, 259 NumberOfCheckSat, 6303 ConstructedInterpolants, 593 QuantifiedInterpolants, 12813730 SizeOfPredicates, 699 NumberOfNonLiveVariables, 13963 ConjunctsInSsa, 2367 ConjunctsInUnsatCore, 68 InterpolantComputations, 2 PerfectInterpolantSequences, 9412/42038 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown