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-invgen/fragtest_simple_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:46:50,605 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:46:50,607 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:46:50,623 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:46:50,623 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:46:50,624 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:46:50,625 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:46:50,628 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:46:50,631 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:46:50,632 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:46:50,632 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:46:50,634 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:46:50,635 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:46:50,636 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:46:50,644 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:46:50,645 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:46:50,649 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:46:50,651 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:46:50,652 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:46:50,654 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:46:50,658 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:46:50,660 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:46:50,665 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:46:50,677 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 15:46:50,699 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:46:50,699 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:46:50,700 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:46:50,700 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:46:50,700 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:46:50,701 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:46:50,701 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:46:50,701 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:46:50,701 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:46:50,702 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:46:50,702 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:46:50,702 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:46:50,702 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:46:50,702 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:46:50,703 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:46:50,703 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:46:50,703 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:46:50,703 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:46:50,703 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:46:50,704 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:46:50,704 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:46:50,704 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:46:50,704 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:46:50,704 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:46:50,705 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:46:50,705 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:46:50,705 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:46:50,705 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:46:50,750 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:46:50,763 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:46:50,766 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:46:50,768 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:46:50,768 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:46:50,769 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-invgen/fragtest_simple_true-unreach-call_true-termination.i [2018-10-22 15:46:50,832 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/67d565250/417765b6fe7f4692932a1ed9ca10da6d/FLAGccbd97d8e [2018-10-22 15:46:51,299 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:46:51,300 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/fragtest_simple_true-unreach-call_true-termination.i [2018-10-22 15:46:51,305 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/67d565250/417765b6fe7f4692932a1ed9ca10da6d/FLAGccbd97d8e [2018-10-22 15:46:51,321 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/67d565250/417765b6fe7f4692932a1ed9ca10da6d [2018-10-22 15:46:51,330 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:46:51,332 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:46:51,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:46:51,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:46:51,337 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:46:51,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:46:51" (1/1) ... [2018-10-22 15:46:51,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fcfba29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:51, skipping insertion in model container [2018-10-22 15:46:51,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:46:51" (1/1) ... [2018-10-22 15:46:51,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:46:51,372 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:46:51,556 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:46:51,560 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:46:51,583 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:46:51,598 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:46:51,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:51 WrapperNode [2018-10-22 15:46:51,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:46:51,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:46:51,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:46:51,600 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:46:51,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:51" (1/1) ... [2018-10-22 15:46:51,615 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:51" (1/1) ... [2018-10-22 15:46:51,634 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:46:51,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:46:51,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:46:51,635 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:46:51,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:51" (1/1) ... [2018-10-22 15:46:51,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:51" (1/1) ... [2018-10-22 15:46:51,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:51" (1/1) ... [2018-10-22 15:46:51,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:51" (1/1) ... [2018-10-22 15:46:51,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:51" (1/1) ... [2018-10-22 15:46:51,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:51" (1/1) ... [2018-10-22 15:46:51,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:51" (1/1) ... [2018-10-22 15:46:51,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:46:51,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:46:51,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:46:51,659 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:46:51,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:51" (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 15:46:51,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:46:51,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:46:52,131 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:46:52,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:46:52 BoogieIcfgContainer [2018-10-22 15:46:52,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:46:52,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:46:52,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:46:52,136 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:46:52,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:46:51" (1/3) ... [2018-10-22 15:46:52,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a2f367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:46:52, skipping insertion in model container [2018-10-22 15:46:52,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:51" (2/3) ... [2018-10-22 15:46:52,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a2f367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:46:52, skipping insertion in model container [2018-10-22 15:46:52,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:46:52" (3/3) ... [2018-10-22 15:46:52,139 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple_true-unreach-call_true-termination.i [2018-10-22 15:46:52,147 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:46:52,154 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:46:52,170 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:46:52,200 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:46:52,200 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:46:52,201 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:46:52,201 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:46:52,201 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:46:52,201 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:46:52,201 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:46:52,201 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:46:52,202 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:46:52,216 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-10-22 15:46:52,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 15:46:52,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:52,223 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:52,225 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:52,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:52,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1447458234, now seen corresponding path program 1 times [2018-10-22 15:46:52,232 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:52,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:52,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:52,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:52,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:52,332 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 15:46:52,334 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:46:52,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:46:52,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:46:52,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:46:52,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:46:52,357 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-10-22 15:46:52,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:52,376 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2018-10-22 15:46:52,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:46:52,377 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-10-22 15:46:52,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:52,387 INFO L225 Difference]: With dead ends: 39 [2018-10-22 15:46:52,387 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 15:46:52,391 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 15:46:52,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 15:46:52,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-22 15:46:52,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 15:46:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2018-10-22 15:46:52,430 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2018-10-22 15:46:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:52,430 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2018-10-22 15:46:52,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:46:52,431 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2018-10-22 15:46:52,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 15:46:52,431 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:52,433 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:52,433 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:52,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:52,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2129962202, now seen corresponding path program 1 times [2018-10-22 15:46:52,436 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:52,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:52,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:52,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:52,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:52,562 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 15:46:52,562 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:46:52,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 15:46:52,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:46:52,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:46:52,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:46:52,565 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 4 states. [2018-10-22 15:46:52,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:52,671 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-10-22 15:46:52,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:46:52,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-10-22 15:46:52,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:52,673 INFO L225 Difference]: With dead ends: 27 [2018-10-22 15:46:52,673 INFO L226 Difference]: Without dead ends: 25 [2018-10-22 15:46:52,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:46:52,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-22 15:46:52,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2018-10-22 15:46:52,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-22 15:46:52,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2018-10-22 15:46:52,679 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2018-10-22 15:46:52,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:52,680 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2018-10-22 15:46:52,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:46:52,680 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2018-10-22 15:46:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-22 15:46:52,683 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:52,683 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:52,683 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:52,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:52,684 INFO L82 PathProgramCache]: Analyzing trace with hash 514343373, now seen corresponding path program 1 times [2018-10-22 15:46:52,684 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:52,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:52,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:52,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:52,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:52,807 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:46:52,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:46:52,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:46:52,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:46:52,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:46:52,808 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2018-10-22 15:46:53,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:53,036 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2018-10-22 15:46:53,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:46:53,036 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-10-22 15:46:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:53,037 INFO L225 Difference]: With dead ends: 42 [2018-10-22 15:46:53,038 INFO L226 Difference]: Without dead ends: 29 [2018-10-22 15:46:53,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:46:53,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-22 15:46:53,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-10-22 15:46:53,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-22 15:46:53,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2018-10-22 15:46:53,043 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 20 [2018-10-22 15:46:53,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:53,044 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2018-10-22 15:46:53,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:46:53,044 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2018-10-22 15:46:53,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-22 15:46:53,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:53,045 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:53,045 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:53,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:53,046 INFO L82 PathProgramCache]: Analyzing trace with hash -464363487, now seen corresponding path program 1 times [2018-10-22 15:46:53,046 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:53,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:53,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:53,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:53,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:53,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:53,295 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-22 15:46:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:53,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:53,315 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 15:46:53,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:53,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:53,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:53,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-10-22 15:46:53,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:46:53,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:46:53,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:46:53,509 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 10 states. [2018-10-22 15:46:53,900 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-10-22 15:46:54,074 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-22 15:46:54,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:54,374 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2018-10-22 15:46:54,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:46:54,377 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2018-10-22 15:46:54,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:54,379 INFO L225 Difference]: With dead ends: 56 [2018-10-22 15:46:54,379 INFO L226 Difference]: Without dead ends: 43 [2018-10-22 15:46:54,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:46:54,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-22 15:46:54,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-10-22 15:46:54,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-22 15:46:54,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2018-10-22 15:46:54,387 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2018-10-22 15:46:54,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:54,387 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2018-10-22 15:46:54,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:46:54,387 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2018-10-22 15:46:54,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-22 15:46:54,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:54,389 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:54,389 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:54,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:54,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1173357882, now seen corresponding path program 2 times [2018-10-22 15:46:54,390 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:54,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:54,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:54,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:54,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:54,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:54,553 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 15:46:54,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:46:54,587 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:46:54,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:54,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:54,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:54,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2018-10-22 15:46:54,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:46:54,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:46:54,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:46:54,818 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 13 states. [2018-10-22 15:46:55,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:55,328 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2018-10-22 15:46:55,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:46:55,329 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2018-10-22 15:46:55,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:55,333 INFO L225 Difference]: With dead ends: 74 [2018-10-22 15:46:55,333 INFO L226 Difference]: Without dead ends: 56 [2018-10-22 15:46:55,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:46:55,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-22 15:46:55,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2018-10-22 15:46:55,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-22 15:46:55,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2018-10-22 15:46:55,344 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 31 [2018-10-22 15:46:55,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:55,344 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2018-10-22 15:46:55,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:46:55,344 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2018-10-22 15:46:55,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-22 15:46:55,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:55,346 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:55,346 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:55,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:55,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2096819263, now seen corresponding path program 3 times [2018-10-22 15:46:55,346 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:55,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:55,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:55,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:55,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:55,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:55,666 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 15:46:55,674 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:46:55,707 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:46:55,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:55,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:55,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:55,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2018-10-22 15:46:55,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:46:55,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:46:55,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:46:55,853 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 14 states. [2018-10-22 15:46:56,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:56,344 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2018-10-22 15:46:56,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:46:56,344 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2018-10-22 15:46:56,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:56,346 INFO L225 Difference]: With dead ends: 86 [2018-10-22 15:46:56,346 INFO L226 Difference]: Without dead ends: 63 [2018-10-22 15:46:56,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:46:56,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-22 15:46:56,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 43. [2018-10-22 15:46:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-22 15:46:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2018-10-22 15:46:56,353 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 39 [2018-10-22 15:46:56,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:56,354 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2018-10-22 15:46:56,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:46:56,354 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2018-10-22 15:46:56,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-22 15:46:56,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:56,355 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:56,356 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:56,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:56,356 INFO L82 PathProgramCache]: Analyzing trace with hash -246117139, now seen corresponding path program 4 times [2018-10-22 15:46:56,356 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:56,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:56,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:56,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:56,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:56,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:56,484 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 15:46:56,492 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:46:56,516 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:46:56,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:56,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:56,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:56,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2018-10-22 15:46:56,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:46:56,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:46:56,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:46:56,622 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 11 states. [2018-10-22 15:46:56,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:56,854 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2018-10-22 15:46:56,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:46:56,857 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2018-10-22 15:46:56,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:56,858 INFO L225 Difference]: With dead ends: 64 [2018-10-22 15:46:56,858 INFO L226 Difference]: Without dead ends: 62 [2018-10-22 15:46:56,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:46:56,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-22 15:46:56,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2018-10-22 15:46:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-22 15:46:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2018-10-22 15:46:56,867 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 42 [2018-10-22 15:46:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:56,868 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2018-10-22 15:46:56,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:46:56,868 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2018-10-22 15:46:56,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-22 15:46:56,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:56,869 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:56,870 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:56,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:56,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1072238323, now seen corresponding path program 5 times [2018-10-22 15:46:56,870 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:56,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:56,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:56,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:56,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 65 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:57,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:57,088 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 15:46:57,096 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:46:57,132 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 15:46:57,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:57,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 65 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:57,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:57,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-10-22 15:46:57,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:46:57,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:46:57,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:46:57,315 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 19 states. [2018-10-22 15:46:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:57,679 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2018-10-22 15:46:57,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:46:57,682 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2018-10-22 15:46:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:57,683 INFO L225 Difference]: With dead ends: 112 [2018-10-22 15:46:57,683 INFO L226 Difference]: Without dead ends: 81 [2018-10-22 15:46:57,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:46:57,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-22 15:46:57,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 56. [2018-10-22 15:46:57,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-22 15:46:57,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2018-10-22 15:46:57,692 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 52 [2018-10-22 15:46:57,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:57,693 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2018-10-22 15:46:57,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:46:57,693 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2018-10-22 15:46:57,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-22 15:46:57,694 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:57,694 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:57,695 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:57,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:57,695 INFO L82 PathProgramCache]: Analyzing trace with hash -258818207, now seen corresponding path program 6 times [2018-10-22 15:46:57,695 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:57,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:57,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:57,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:57,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 65 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:57,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:57,892 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 15:46:57,900 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:46:57,999 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-22 15:46:57,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:58,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 65 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:58,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:58,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2018-10-22 15:46:58,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 15:46:58,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 15:46:58,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:46:58,312 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 20 states. [2018-10-22 15:46:58,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:58,747 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2018-10-22 15:46:58,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:46:58,747 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2018-10-22 15:46:58,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:58,749 INFO L225 Difference]: With dead ends: 122 [2018-10-22 15:46:58,749 INFO L226 Difference]: Without dead ends: 89 [2018-10-22 15:46:58,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:46:58,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-22 15:46:58,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2018-10-22 15:46:58,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-22 15:46:58,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2018-10-22 15:46:58,760 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 55 [2018-10-22 15:46:58,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:58,760 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2018-10-22 15:46:58,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 15:46:58,760 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2018-10-22 15:46:58,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-22 15:46:58,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:58,761 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:58,762 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:58,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:58,762 INFO L82 PathProgramCache]: Analyzing trace with hash 134373517, now seen corresponding path program 7 times [2018-10-22 15:46:58,762 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:58,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:58,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:58,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:58,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 63 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:58,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:58,950 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 15:46:58,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:58,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 63 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:59,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:59,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-10-22 15:46:59,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:46:59,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:46:59,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:46:59,040 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 12 states. [2018-10-22 15:46:59,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:59,193 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-10-22 15:46:59,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:46:59,194 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2018-10-22 15:46:59,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:59,195 INFO L225 Difference]: With dead ends: 75 [2018-10-22 15:46:59,195 INFO L226 Difference]: Without dead ends: 73 [2018-10-22 15:46:59,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:46:59,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-22 15:46:59,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2018-10-22 15:46:59,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-22 15:46:59,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2018-10-22 15:46:59,207 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 58 [2018-10-22 15:46:59,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:59,207 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2018-10-22 15:46:59,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:46:59,207 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2018-10-22 15:46:59,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-22 15:46:59,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:59,208 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:59,209 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:59,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:59,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1329021779, now seen corresponding path program 8 times [2018-10-22 15:46:59,209 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:59,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:59,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:59,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:59,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:59,505 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 126 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:59,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:59,506 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 15:46:59,513 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:46:59,545 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:46:59,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:59,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 123 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-22 15:47:00,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:00,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 24 [2018-10-22 15:47:00,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 15:47:00,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 15:47:00,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:47:00,008 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 24 states. [2018-10-22 15:47:00,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:00,412 INFO L93 Difference]: Finished difference Result 148 states and 166 transitions. [2018-10-22 15:47:00,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:47:00,412 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 68 [2018-10-22 15:47:00,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:00,413 INFO L225 Difference]: With dead ends: 148 [2018-10-22 15:47:00,413 INFO L226 Difference]: Without dead ends: 107 [2018-10-22 15:47:00,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=668, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:47:00,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-22 15:47:00,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 72. [2018-10-22 15:47:00,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-22 15:47:00,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2018-10-22 15:47:00,422 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 68 [2018-10-22 15:47:00,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:00,423 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2018-10-22 15:47:00,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 15:47:00,423 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2018-10-22 15:47:00,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-22 15:47:00,424 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:00,424 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:00,424 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:00,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:00,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1281006847, now seen corresponding path program 9 times [2018-10-22 15:47:00,425 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:00,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:00,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:00,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:00,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 126 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:00,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:00,691 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 15:47:00,702 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:47:00,735 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-22 15:47:00,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:00,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 126 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:01,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:01,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2018-10-22 15:47:01,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-22 15:47:01,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-22 15:47:01,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:47:01,011 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 26 states. [2018-10-22 15:47:01,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:01,571 INFO L93 Difference]: Finished difference Result 158 states and 178 transitions. [2018-10-22 15:47:01,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:47:01,572 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 71 [2018-10-22 15:47:01,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:01,573 INFO L225 Difference]: With dead ends: 158 [2018-10-22 15:47:01,573 INFO L226 Difference]: Without dead ends: 115 [2018-10-22 15:47:01,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:47:01,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-22 15:47:01,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 75. [2018-10-22 15:47:01,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-22 15:47:01,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2018-10-22 15:47:01,582 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 71 [2018-10-22 15:47:01,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:01,583 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2018-10-22 15:47:01,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-22 15:47:01,583 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2018-10-22 15:47:01,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-22 15:47:01,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:01,584 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:01,584 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:01,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:01,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1092277203, now seen corresponding path program 10 times [2018-10-22 15:47:01,585 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:01,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:01,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:01,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:01,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:01,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 108 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:01,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:01,847 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 15:47:01,855 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:47:01,884 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:47:01,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:01,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 108 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:01,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:01,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2018-10-22 15:47:01,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:47:01,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:47:01,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:47:01,983 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 15 states. [2018-10-22 15:47:02,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:02,499 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2018-10-22 15:47:02,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:47:02,499 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 74 [2018-10-22 15:47:02,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:02,501 INFO L225 Difference]: With dead ends: 96 [2018-10-22 15:47:02,501 INFO L226 Difference]: Without dead ends: 94 [2018-10-22 15:47:02,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:47:02,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-22 15:47:02,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2018-10-22 15:47:02,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-22 15:47:02,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2018-10-22 15:47:02,513 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 74 [2018-10-22 15:47:02,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:02,513 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2018-10-22 15:47:02,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:47:02,514 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2018-10-22 15:47:02,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-22 15:47:02,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:02,515 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:02,515 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:02,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:02,515 INFO L82 PathProgramCache]: Analyzing trace with hash 500793421, now seen corresponding path program 11 times [2018-10-22 15:47:02,515 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:02,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:02,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:02,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:02,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 207 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:02,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:02,825 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 15:47:02,837 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:47:02,876 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-22 15:47:02,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:02,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:03,167 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 207 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:03,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:03,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2018-10-22 15:47:03,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:47:03,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:47:03,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:47:03,189 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 31 states. [2018-10-22 15:47:03,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:03,563 INFO L93 Difference]: Finished difference Result 184 states and 206 transitions. [2018-10-22 15:47:03,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:47:03,564 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 84 [2018-10-22 15:47:03,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:03,565 INFO L225 Difference]: With dead ends: 184 [2018-10-22 15:47:03,565 INFO L226 Difference]: Without dead ends: 133 [2018-10-22 15:47:03,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=429, Invalid=1131, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:47:03,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-22 15:47:03,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 88. [2018-10-22 15:47:03,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-22 15:47:03,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2018-10-22 15:47:03,575 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 84 [2018-10-22 15:47:03,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:03,576 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2018-10-22 15:47:03,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-22 15:47:03,576 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2018-10-22 15:47:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-22 15:47:03,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:03,577 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:03,577 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:03,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:03,577 INFO L82 PathProgramCache]: Analyzing trace with hash -2040070495, now seen corresponding path program 12 times [2018-10-22 15:47:03,578 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:03,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:03,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:03,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:03,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 207 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:04,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:04,366 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 15:47:04,374 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:47:04,432 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-22 15:47:04,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:04,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 207 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:04,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:04,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 32 [2018-10-22 15:47:04,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-22 15:47:04,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-22 15:47:04,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:47:04,812 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 32 states. [2018-10-22 15:47:05,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:05,312 INFO L93 Difference]: Finished difference Result 194 states and 218 transitions. [2018-10-22 15:47:05,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:47:05,312 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2018-10-22 15:47:05,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:05,314 INFO L225 Difference]: With dead ends: 194 [2018-10-22 15:47:05,314 INFO L226 Difference]: Without dead ends: 141 [2018-10-22 15:47:05,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=481, Invalid=1241, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:47:05,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-22 15:47:05,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 91. [2018-10-22 15:47:05,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-22 15:47:05,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2018-10-22 15:47:05,323 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 87 [2018-10-22 15:47:05,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:05,323 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2018-10-22 15:47:05,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-22 15:47:05,323 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2018-10-22 15:47:05,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-22 15:47:05,324 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:05,324 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:05,325 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:05,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:05,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1881599949, now seen corresponding path program 13 times [2018-10-22 15:47:05,325 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:05,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:05,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:05,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:05,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 165 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:05,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:05,591 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 15:47:05,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:05,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 165 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:05,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:05,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-10-22 15:47:05,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:47:05,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:47:05,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:47:05,730 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 16 states. [2018-10-22 15:47:06,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:06,035 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2018-10-22 15:47:06,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:47:06,038 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2018-10-22 15:47:06,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:06,039 INFO L225 Difference]: With dead ends: 107 [2018-10-22 15:47:06,039 INFO L226 Difference]: Without dead ends: 105 [2018-10-22 15:47:06,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:47:06,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-22 15:47:06,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2018-10-22 15:47:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-22 15:47:06,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2018-10-22 15:47:06,052 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 90 [2018-10-22 15:47:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:06,052 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2018-10-22 15:47:06,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:47:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2018-10-22 15:47:06,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-22 15:47:06,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:06,054 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:06,054 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:06,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:06,055 INFO L82 PathProgramCache]: Analyzing trace with hash 888355821, now seen corresponding path program 14 times [2018-10-22 15:47:06,055 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:06,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:06,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:06,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:06,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 308 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:06,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:06,682 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 15:47:06,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:47:06,730 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:47:06,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:06,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 305 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-22 15:47:07,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:07,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 36 [2018-10-22 15:47:07,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-22 15:47:07,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-22 15:47:07,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:47:07,376 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 36 states. [2018-10-22 15:47:08,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:08,071 INFO L93 Difference]: Finished difference Result 220 states and 246 transitions. [2018-10-22 15:47:08,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 15:47:08,071 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 100 [2018-10-22 15:47:08,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:08,072 INFO L225 Difference]: With dead ends: 220 [2018-10-22 15:47:08,072 INFO L226 Difference]: Without dead ends: 159 [2018-10-22 15:47:08,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=586, Invalid=1576, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:47:08,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-22 15:47:08,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 104. [2018-10-22 15:47:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-22 15:47:08,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2018-10-22 15:47:08,080 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 100 [2018-10-22 15:47:08,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:08,081 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2018-10-22 15:47:08,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-22 15:47:08,081 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2018-10-22 15:47:08,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-22 15:47:08,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:08,082 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:08,082 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:08,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:08,083 INFO L82 PathProgramCache]: Analyzing trace with hash -159280575, now seen corresponding path program 15 times [2018-10-22 15:47:08,083 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:08,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:08,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:08,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:08,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 308 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:08,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:08,544 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 15:47:08,553 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:47:08,600 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-22 15:47:08,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:08,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 308 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:09,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:09,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 38 [2018-10-22 15:47:09,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-22 15:47:09,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-22 15:47:09,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1057, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:47:09,088 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand 38 states. [2018-10-22 15:47:09,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:09,506 INFO L93 Difference]: Finished difference Result 230 states and 258 transitions. [2018-10-22 15:47:09,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:47:09,506 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 103 [2018-10-22 15:47:09,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:09,508 INFO L225 Difference]: With dead ends: 230 [2018-10-22 15:47:09,508 INFO L226 Difference]: Without dead ends: 167 [2018-10-22 15:47:09,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:47:09,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-22 15:47:09,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 107. [2018-10-22 15:47:09,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-22 15:47:09,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2018-10-22 15:47:09,518 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 103 [2018-10-22 15:47:09,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:09,518 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2018-10-22 15:47:09,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-22 15:47:09,518 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2018-10-22 15:47:09,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-22 15:47:09,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:09,519 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:09,520 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:09,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:09,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1232186221, now seen corresponding path program 16 times [2018-10-22 15:47:09,520 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:09,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:09,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:09,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:09,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 234 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:09,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:09,755 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 15:47:09,762 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:47:09,806 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:47:09,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:09,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 234 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:09,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:09,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2018-10-22 15:47:09,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:47:09,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:47:09,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:47:09,955 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand 19 states. [2018-10-22 15:47:10,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:10,226 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2018-10-22 15:47:10,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-22 15:47:10,226 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 106 [2018-10-22 15:47:10,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:10,227 INFO L225 Difference]: With dead ends: 128 [2018-10-22 15:47:10,228 INFO L226 Difference]: Without dead ends: 126 [2018-10-22 15:47:10,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=350, Invalid=642, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:47:10,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-22 15:47:10,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 117. [2018-10-22 15:47:10,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-22 15:47:10,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2018-10-22 15:47:10,239 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 106 [2018-10-22 15:47:10,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:10,239 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2018-10-22 15:47:10,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:47:10,240 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2018-10-22 15:47:10,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-22 15:47:10,240 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:10,241 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:10,241 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:10,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:10,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1757417587, now seen corresponding path program 17 times [2018-10-22 15:47:10,241 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:10,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:10,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:10,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:10,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 429 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:10,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:10,953 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 15:47:10,961 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:47:11,014 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-22 15:47:11,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:11,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 429 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:11,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:11,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2018-10-22 15:47:11,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-22 15:47:11,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-22 15:47:11,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=1358, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:47:11,597 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand 43 states. [2018-10-22 15:47:12,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:12,356 INFO L93 Difference]: Finished difference Result 256 states and 286 transitions. [2018-10-22 15:47:12,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-22 15:47:12,356 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 116 [2018-10-22 15:47:12,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:12,357 INFO L225 Difference]: With dead ends: 256 [2018-10-22 15:47:12,357 INFO L226 Difference]: Without dead ends: 185 [2018-10-22 15:47:12,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=825, Invalid=2255, Unknown=0, NotChecked=0, Total=3080 [2018-10-22 15:47:12,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-22 15:47:12,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 120. [2018-10-22 15:47:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-22 15:47:12,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2018-10-22 15:47:12,369 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 116 [2018-10-22 15:47:12,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:12,370 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2018-10-22 15:47:12,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-22 15:47:12,370 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2018-10-22 15:47:12,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-22 15:47:12,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:12,371 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:12,371 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:12,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:12,372 INFO L82 PathProgramCache]: Analyzing trace with hash 85925345, now seen corresponding path program 18 times [2018-10-22 15:47:12,372 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:12,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:12,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:12,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:12,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 429 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:13,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:13,002 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 15:47:13,011 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:47:13,067 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-22 15:47:13,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:13,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 429 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:13,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:13,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 44 [2018-10-22 15:47:13,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-22 15:47:13,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-22 15:47:13,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1429, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:47:13,657 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand 44 states. [2018-10-22 15:47:14,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:14,162 INFO L93 Difference]: Finished difference Result 266 states and 298 transitions. [2018-10-22 15:47:14,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 15:47:14,162 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 119 [2018-10-22 15:47:14,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:14,164 INFO L225 Difference]: With dead ends: 266 [2018-10-22 15:47:14,164 INFO L226 Difference]: Without dead ends: 193 [2018-10-22 15:47:14,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2018-10-22 15:47:14,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-22 15:47:14,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 123. [2018-10-22 15:47:14,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-22 15:47:14,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2018-10-22 15:47:14,175 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 119 [2018-10-22 15:47:14,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:14,175 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2018-10-22 15:47:14,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-22 15:47:14,175 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2018-10-22 15:47:14,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-22 15:47:14,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:14,176 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:14,176 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:14,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:14,176 INFO L82 PathProgramCache]: Analyzing trace with hash -336634099, now seen corresponding path program 19 times [2018-10-22 15:47:14,177 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:14,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:14,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:14,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:14,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 315 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:14,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:14,639 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 15:47:14,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:14,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 315 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:14,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:14,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-10-22 15:47:14,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 15:47:14,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 15:47:14,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:47:14,768 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand 20 states. [2018-10-22 15:47:15,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:15,044 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2018-10-22 15:47:15,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-22 15:47:15,045 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 122 [2018-10-22 15:47:15,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:15,046 INFO L225 Difference]: With dead ends: 139 [2018-10-22 15:47:15,046 INFO L226 Difference]: Without dead ends: 137 [2018-10-22 15:47:15,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:47:15,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-22 15:47:15,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2018-10-22 15:47:15,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-22 15:47:15,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2018-10-22 15:47:15,059 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 122 [2018-10-22 15:47:15,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:15,059 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2018-10-22 15:47:15,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 15:47:15,059 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2018-10-22 15:47:15,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-22 15:47:15,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:15,060 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:15,060 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:15,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:15,060 INFO L82 PathProgramCache]: Analyzing trace with hash -110519507, now seen corresponding path program 20 times [2018-10-22 15:47:15,060 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:15,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:15,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:15,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:15,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 570 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:15,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:15,520 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 15:47:15,535 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:47:15,593 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:47:15,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:15,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 567 proven. 315 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-22 15:47:16,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:16,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 48 [2018-10-22 15:47:16,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-22 15:47:16,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-22 15:47:16,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:47:16,066 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand 48 states. [2018-10-22 15:47:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:16,631 INFO L93 Difference]: Finished difference Result 292 states and 326 transitions. [2018-10-22 15:47:16,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 15:47:16,631 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 132 [2018-10-22 15:47:16,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:16,633 INFO L225 Difference]: With dead ends: 292 [2018-10-22 15:47:16,633 INFO L226 Difference]: Without dead ends: 211 [2018-10-22 15:47:16,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1038, Invalid=2868, Unknown=0, NotChecked=0, Total=3906 [2018-10-22 15:47:16,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-22 15:47:16,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 136. [2018-10-22 15:47:16,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-22 15:47:16,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2018-10-22 15:47:16,647 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 132 [2018-10-22 15:47:16,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:16,647 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2018-10-22 15:47:16,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-22 15:47:16,647 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2018-10-22 15:47:16,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-22 15:47:16,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:16,648 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:16,648 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:16,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:16,649 INFO L82 PathProgramCache]: Analyzing trace with hash -957767295, now seen corresponding path program 21 times [2018-10-22 15:47:16,649 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:16,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:16,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:16,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:16,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 570 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:17,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:17,737 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 15:47:17,744 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:47:17,810 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-22 15:47:17,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:17,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:18,363 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 570 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:18,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:18,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 50 [2018-10-22 15:47:18,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-22 15:47:18,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-22 15:47:18,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1857, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:47:18,385 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand 50 states. [2018-10-22 15:47:19,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:19,806 INFO L93 Difference]: Finished difference Result 302 states and 338 transitions. [2018-10-22 15:47:19,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-22 15:47:19,807 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 135 [2018-10-22 15:47:19,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:19,808 INFO L225 Difference]: With dead ends: 302 [2018-10-22 15:47:19,808 INFO L226 Difference]: Without dead ends: 219 [2018-10-22 15:47:19,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1153, Invalid=3137, Unknown=0, NotChecked=0, Total=4290 [2018-10-22 15:47:19,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-22 15:47:19,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 139. [2018-10-22 15:47:19,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-22 15:47:19,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2018-10-22 15:47:19,822 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 135 [2018-10-22 15:47:19,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:19,822 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2018-10-22 15:47:19,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-22 15:47:19,822 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2018-10-22 15:47:19,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-22 15:47:19,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:19,823 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:19,823 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:19,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:19,823 INFO L82 PathProgramCache]: Analyzing trace with hash 206178989, now seen corresponding path program 22 times [2018-10-22 15:47:19,824 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:19,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:19,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:19,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:19,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:20,140 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 408 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:20,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:20,141 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 15:47:20,148 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:47:20,202 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:47:20,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:20,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 408 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:20,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:20,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2018-10-22 15:47:20,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:47:20,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:47:20,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:47:20,304 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand 23 states. [2018-10-22 15:47:20,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:20,761 INFO L93 Difference]: Finished difference Result 160 states and 166 transitions. [2018-10-22 15:47:20,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-22 15:47:20,761 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 138 [2018-10-22 15:47:20,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:20,763 INFO L225 Difference]: With dead ends: 160 [2018-10-22 15:47:20,763 INFO L226 Difference]: Without dead ends: 158 [2018-10-22 15:47:20,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=556, Invalid=1004, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:47:20,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-22 15:47:20,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2018-10-22 15:47:20,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-22 15:47:20,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2018-10-22 15:47:20,780 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 138 [2018-10-22 15:47:20,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:20,780 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2018-10-22 15:47:20,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:47:20,780 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2018-10-22 15:47:20,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-22 15:47:20,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:20,781 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:20,781 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:20,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:20,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1013301555, now seen corresponding path program 23 times [2018-10-22 15:47:20,782 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:20,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:20,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:20,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:20,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 731 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:21,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:21,329 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 15:47:21,337 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:47:21,415 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-22 15:47:21,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:21,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 731 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:22,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:22,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 55 [2018-10-22 15:47:22,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-22 15:47:22,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-22 15:47:22,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=720, Invalid=2250, Unknown=0, NotChecked=0, Total=2970 [2018-10-22 15:47:22,115 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand 55 states. [2018-10-22 15:47:23,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:23,105 INFO L93 Difference]: Finished difference Result 328 states and 366 transitions. [2018-10-22 15:47:23,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-22 15:47:23,105 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 148 [2018-10-22 15:47:23,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:23,106 INFO L225 Difference]: With dead ends: 328 [2018-10-22 15:47:23,106 INFO L226 Difference]: Without dead ends: 237 [2018-10-22 15:47:23,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1349, Invalid=3763, Unknown=0, NotChecked=0, Total=5112 [2018-10-22 15:47:23,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-10-22 15:47:23,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 152. [2018-10-22 15:47:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-22 15:47:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2018-10-22 15:47:23,125 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 148 [2018-10-22 15:47:23,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:23,125 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2018-10-22 15:47:23,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-22 15:47:23,125 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2018-10-22 15:47:23,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-22 15:47:23,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:23,126 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:23,127 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:23,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:23,127 INFO L82 PathProgramCache]: Analyzing trace with hash 67837217, now seen corresponding path program 24 times [2018-10-22 15:47:23,127 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:23,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:23,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:23,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:23,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 731 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:23,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:23,743 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 15:47:23,751 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:47:23,823 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-10-22 15:47:23,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:23,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 731 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:24,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:24,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 56 [2018-10-22 15:47:24,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-22 15:47:24,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-22 15:47:24,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=739, Invalid=2341, Unknown=0, NotChecked=0, Total=3080 [2018-10-22 15:47:24,421 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand 56 states. [2018-10-22 15:47:26,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:26,087 INFO L93 Difference]: Finished difference Result 338 states and 378 transitions. [2018-10-22 15:47:26,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-22 15:47:26,087 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 151 [2018-10-22 15:47:26,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:26,089 INFO L225 Difference]: With dead ends: 338 [2018-10-22 15:47:26,089 INFO L226 Difference]: Without dead ends: 245 [2018-10-22 15:47:26,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1441, Invalid=3961, Unknown=0, NotChecked=0, Total=5402 [2018-10-22 15:47:26,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-10-22 15:47:26,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 155. [2018-10-22 15:47:26,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-22 15:47:26,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2018-10-22 15:47:26,105 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 151 [2018-10-22 15:47:26,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:26,106 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2018-10-22 15:47:26,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-22 15:47:26,106 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2018-10-22 15:47:26,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-22 15:47:26,107 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:26,107 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:26,107 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:26,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:26,107 INFO L82 PathProgramCache]: Analyzing trace with hash 313241165, now seen corresponding path program 25 times [2018-10-22 15:47:26,108 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:26,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:26,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:26,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:26,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 513 proven. 731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:26,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:26,468 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 15:47:26,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:26,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 513 proven. 731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:26,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:26,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-10-22 15:47:26,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 15:47:26,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 15:47:26,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:47:26,611 INFO L87 Difference]: Start difference. First operand 155 states and 158 transitions. Second operand 24 states. [2018-10-22 15:47:27,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:27,021 INFO L93 Difference]: Finished difference Result 171 states and 175 transitions. [2018-10-22 15:47:27,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-22 15:47:27,022 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 154 [2018-10-22 15:47:27,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:27,023 INFO L225 Difference]: With dead ends: 171 [2018-10-22 15:47:27,023 INFO L226 Difference]: Without dead ends: 169 [2018-10-22 15:47:27,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:47:27,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-22 15:47:27,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2018-10-22 15:47:27,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-22 15:47:27,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2018-10-22 15:47:27,040 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 154 [2018-10-22 15:47:27,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:27,040 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2018-10-22 15:47:27,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 15:47:27,040 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2018-10-22 15:47:27,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-22 15:47:27,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:27,041 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:27,041 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:27,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:27,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1317283219, now seen corresponding path program 26 times [2018-10-22 15:47:27,042 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:27,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:27,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:27,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:27,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 912 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:28,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:28,503 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 15:47:28,510 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:47:28,592 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:47:28,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:28,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 909 proven. 513 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-22 15:47:30,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:30,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 60 [2018-10-22 15:47:30,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-22 15:47:30,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-22 15:47:30,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2018-10-22 15:47:30,669 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand 60 states. [2018-10-22 15:47:31,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:31,727 INFO L93 Difference]: Finished difference Result 364 states and 406 transitions. [2018-10-22 15:47:31,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-22 15:47:31,727 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 164 [2018-10-22 15:47:31,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:31,730 INFO L225 Difference]: With dead ends: 364 [2018-10-22 15:47:31,730 INFO L226 Difference]: Without dead ends: 263 [2018-10-22 15:47:31,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1618, Invalid=4544, Unknown=0, NotChecked=0, Total=6162 [2018-10-22 15:47:31,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-10-22 15:47:31,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 168. [2018-10-22 15:47:31,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-22 15:47:31,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 171 transitions. [2018-10-22 15:47:31,748 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 171 transitions. Word has length 164 [2018-10-22 15:47:31,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:31,748 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 171 transitions. [2018-10-22 15:47:31,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-22 15:47:31,748 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 171 transitions. [2018-10-22 15:47:31,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-22 15:47:31,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:31,749 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:31,749 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:31,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:31,749 INFO L82 PathProgramCache]: Analyzing trace with hash -668102463, now seen corresponding path program 27 times [2018-10-22 15:47:31,749 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:31,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:31,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:31,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:31,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 912 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:32,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:32,749 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 15:47:32,758 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:47:32,839 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-10-22 15:47:32,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:32,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:33,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 912 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:33,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:33,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 62 [2018-10-22 15:47:33,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-22 15:47:33,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-22 15:47:33,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2881, Unknown=0, NotChecked=0, Total=3782 [2018-10-22 15:47:33,690 INFO L87 Difference]: Start difference. First operand 168 states and 171 transitions. Second operand 62 states. [2018-10-22 15:47:34,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:34,708 INFO L93 Difference]: Finished difference Result 374 states and 418 transitions. [2018-10-22 15:47:34,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-22 15:47:34,708 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 167 [2018-10-22 15:47:34,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:34,710 INFO L225 Difference]: With dead ends: 374 [2018-10-22 15:47:34,710 INFO L226 Difference]: Without dead ends: 271 [2018-10-22 15:47:34,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1761, Invalid=4881, Unknown=0, NotChecked=0, Total=6642 [2018-10-22 15:47:34,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-10-22 15:47:34,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 171. [2018-10-22 15:47:34,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-22 15:47:34,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 174 transitions. [2018-10-22 15:47:34,729 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 174 transitions. Word has length 167 [2018-10-22 15:47:34,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:34,729 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 174 transitions. [2018-10-22 15:47:34,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-22 15:47:34,729 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 174 transitions. [2018-10-22 15:47:34,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-22 15:47:34,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:34,730 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:34,730 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:34,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:34,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1161934355, now seen corresponding path program 28 times [2018-10-22 15:47:34,731 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:34,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:34,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:34,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:34,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:35,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 630 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:35,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:35,508 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 15:47:35,518 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:47:35,593 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:47:35,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:35,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 630 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:35,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:35,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2018-10-22 15:47:35,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-22 15:47:35,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-22 15:47:35,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:47:35,737 INFO L87 Difference]: Start difference. First operand 171 states and 174 transitions. Second operand 27 states. [2018-10-22 15:47:36,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:36,334 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2018-10-22 15:47:36,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-22 15:47:36,335 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 170 [2018-10-22 15:47:36,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:36,336 INFO L225 Difference]: With dead ends: 192 [2018-10-22 15:47:36,336 INFO L226 Difference]: Without dead ends: 190 [2018-10-22 15:47:36,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=810, Invalid=1446, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:47:36,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-22 15:47:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 181. [2018-10-22 15:47:36,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-22 15:47:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2018-10-22 15:47:36,357 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 170 [2018-10-22 15:47:36,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:36,357 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2018-10-22 15:47:36,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-22 15:47:36,357 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2018-10-22 15:47:36,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-22 15:47:36,358 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:36,359 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:36,359 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:36,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:36,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1916300813, now seen corresponding path program 29 times [2018-10-22 15:47:36,359 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:36,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:36,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:36,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:36,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 1113 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:37,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:37,763 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 15:47:37,770 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:47:37,889 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-22 15:47:37,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:37,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 1113 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:39,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:39,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 67 [2018-10-22 15:47:39,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-22 15:47:39,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-22 15:47:39,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=3366, Unknown=0, NotChecked=0, Total=4422 [2018-10-22 15:47:39,962 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand 67 states. [2018-10-22 15:47:40,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:40,960 INFO L93 Difference]: Finished difference Result 400 states and 446 transitions. [2018-10-22 15:47:40,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-22 15:47:40,960 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 180 [2018-10-22 15:47:40,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:40,962 INFO L225 Difference]: With dead ends: 400 [2018-10-22 15:47:40,962 INFO L226 Difference]: Without dead ends: 289 [2018-10-22 15:47:40,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2001, Invalid=5655, Unknown=0, NotChecked=0, Total=7656 [2018-10-22 15:47:40,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-10-22 15:47:40,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 184. [2018-10-22 15:47:40,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-22 15:47:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 187 transitions. [2018-10-22 15:47:40,984 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 187 transitions. Word has length 180 [2018-10-22 15:47:40,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:40,984 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 187 transitions. [2018-10-22 15:47:40,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-22 15:47:40,985 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 187 transitions. [2018-10-22 15:47:40,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-22 15:47:40,986 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:40,986 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:40,986 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:40,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:40,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1383791713, now seen corresponding path program 30 times [2018-10-22 15:47:40,986 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:40,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:40,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:40,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:40,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 1113 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:42,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:42,812 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 15:47:42,819 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:47:42,912 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-22 15:47:42,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:42,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 1113 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:43,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:43,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 68 [2018-10-22 15:47:43,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-22 15:47:43,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-22 15:47:43,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1079, Invalid=3477, Unknown=0, NotChecked=0, Total=4556 [2018-10-22 15:47:43,950 INFO L87 Difference]: Start difference. First operand 184 states and 187 transitions. Second operand 68 states. [2018-10-22 15:47:45,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:45,011 INFO L93 Difference]: Finished difference Result 410 states and 458 transitions. [2018-10-22 15:47:45,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-22 15:47:45,011 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 183 [2018-10-22 15:47:45,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:45,013 INFO L225 Difference]: With dead ends: 410 [2018-10-22 15:47:45,014 INFO L226 Difference]: Without dead ends: 297 [2018-10-22 15:47:45,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2113, Invalid=5897, Unknown=0, NotChecked=0, Total=8010 [2018-10-22 15:47:45,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-10-22 15:47:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 187. [2018-10-22 15:47:45,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-22 15:47:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 190 transitions. [2018-10-22 15:47:45,035 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 190 transitions. Word has length 183 [2018-10-22 15:47:45,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:45,036 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 190 transitions. [2018-10-22 15:47:45,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-22 15:47:45,036 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 190 transitions. [2018-10-22 15:47:45,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-22 15:47:45,037 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:45,037 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:45,037 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:45,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:45,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1280582259, now seen corresponding path program 31 times [2018-10-22 15:47:45,038 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:45,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:45,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:45,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:45,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 759 proven. 1113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:45,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:45,552 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 15:47:45,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:45,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 759 proven. 1113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:45,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:45,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-10-22 15:47:45,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:47:45,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:47:45,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:47:45,781 INFO L87 Difference]: Start difference. First operand 187 states and 190 transitions. Second operand 28 states. [2018-10-22 15:47:46,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:46,269 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2018-10-22 15:47:46,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-22 15:47:46,269 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 186 [2018-10-22 15:47:46,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:46,271 INFO L225 Difference]: With dead ends: 203 [2018-10-22 15:47:46,271 INFO L226 Difference]: Without dead ends: 201 [2018-10-22 15:47:46,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 15:47:46,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-22 15:47:46,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2018-10-22 15:47:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-22 15:47:46,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 200 transitions. [2018-10-22 15:47:46,294 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 200 transitions. Word has length 186 [2018-10-22 15:47:46,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:46,294 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 200 transitions. [2018-10-22 15:47:46,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:47:46,294 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 200 transitions. [2018-10-22 15:47:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-22 15:47:46,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:46,295 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:46,296 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:46,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:46,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1215953325, now seen corresponding path program 32 times [2018-10-22 15:47:46,296 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:46,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:46,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:46,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:46,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 1334 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:47,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:47,341 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 15:47:47,349 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:47:47,426 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:47:47,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:47,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 1331 proven. 759 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-22 15:47:48,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:48,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 72 [2018-10-22 15:47:48,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-22 15:47:48,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-22 15:47:48,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2018-10-22 15:47:48,822 INFO L87 Difference]: Start difference. First operand 197 states and 200 transitions. Second operand 72 states. [2018-10-22 15:47:49,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:49,951 INFO L93 Difference]: Finished difference Result 436 states and 486 transitions. [2018-10-22 15:47:49,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-22 15:47:49,951 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 196 [2018-10-22 15:47:49,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:49,953 INFO L225 Difference]: With dead ends: 436 [2018-10-22 15:47:49,953 INFO L226 Difference]: Without dead ends: 315 [2018-10-22 15:47:49,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2326, Invalid=6604, Unknown=0, NotChecked=0, Total=8930 [2018-10-22 15:47:49,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-22 15:47:49,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 200. [2018-10-22 15:47:49,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-22 15:47:49,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 203 transitions. [2018-10-22 15:47:49,973 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 203 transitions. Word has length 196 [2018-10-22 15:47:49,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:49,974 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 203 transitions. [2018-10-22 15:47:49,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-22 15:47:49,974 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 203 transitions. [2018-10-22 15:47:49,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-10-22 15:47:49,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:49,975 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:49,975 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:49,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:49,975 INFO L82 PathProgramCache]: Analyzing trace with hash 362635265, now seen corresponding path program 33 times [2018-10-22 15:47:49,975 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:49,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:49,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:49,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:49,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 1334 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:51,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:51,556 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 15:47:51,563 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:47:51,666 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-22 15:47:51,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:51,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 1334 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:52,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:52,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 74 [2018-10-22 15:47:52,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-22 15:47:52,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-22 15:47:52,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1273, Invalid=4129, Unknown=0, NotChecked=0, Total=5402 [2018-10-22 15:47:52,730 INFO L87 Difference]: Start difference. First operand 200 states and 203 transitions. Second operand 74 states. [2018-10-22 15:47:54,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:54,105 INFO L93 Difference]: Finished difference Result 446 states and 498 transitions. [2018-10-22 15:47:54,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-22 15:47:54,105 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 199 [2018-10-22 15:47:54,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:54,107 INFO L225 Difference]: With dead ends: 446 [2018-10-22 15:47:54,107 INFO L226 Difference]: Without dead ends: 323 [2018-10-22 15:47:54,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2497, Invalid=7009, Unknown=0, NotChecked=0, Total=9506 [2018-10-22 15:47:54,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-10-22 15:47:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 203. [2018-10-22 15:47:54,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-22 15:47:54,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 206 transitions. [2018-10-22 15:47:54,135 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 206 transitions. Word has length 199 [2018-10-22 15:47:54,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:54,135 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 206 transitions. [2018-10-22 15:47:54,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-22 15:47:54,135 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 206 transitions. [2018-10-22 15:47:54,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-22 15:47:54,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:54,137 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:54,137 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:54,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:54,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1075734829, now seen corresponding path program 34 times [2018-10-22 15:47:54,138 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:54,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:54,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:54,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:54,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2234 backedges. 900 proven. 1334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:54,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:54,826 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 15:47:54,838 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:47:54,920 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:47:54,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:54,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2234 backedges. 900 proven. 1334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:55,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:55,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2018-10-22 15:47:55,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:47:55,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:47:55,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:47:55,032 INFO L87 Difference]: Start difference. First operand 203 states and 206 transitions. Second operand 31 states. [2018-10-22 15:47:55,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:55,618 INFO L93 Difference]: Finished difference Result 224 states and 230 transitions. [2018-10-22 15:47:55,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-22 15:47:55,618 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 202 [2018-10-22 15:47:55,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:55,620 INFO L225 Difference]: With dead ends: 224 [2018-10-22 15:47:55,620 INFO L226 Difference]: Without dead ends: 222 [2018-10-22 15:47:55,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1112, Invalid=1968, Unknown=0, NotChecked=0, Total=3080 [2018-10-22 15:47:55,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-22 15:47:55,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 213. [2018-10-22 15:47:55,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-10-22 15:47:55,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 216 transitions. [2018-10-22 15:47:55,640 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 216 transitions. Word has length 202 [2018-10-22 15:47:55,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:55,641 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 216 transitions. [2018-10-22 15:47:55,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-22 15:47:55,641 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 216 transitions. [2018-10-22 15:47:55,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-22 15:47:55,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:55,642 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:55,642 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:55,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:55,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1435861683, now seen corresponding path program 35 times [2018-10-22 15:47:55,643 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:55,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:55,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:55,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:55,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 1575 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:56,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:56,617 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:47:56,624 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:47:56,771 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-22 15:47:56,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:56,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 1575 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:57,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:57,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2018-10-22 15:47:57,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-22 15:47:57,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-22 15:47:57,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=4706, Unknown=0, NotChecked=0, Total=6162 [2018-10-22 15:47:57,915 INFO L87 Difference]: Start difference. First operand 213 states and 216 transitions. Second operand 79 states. [2018-10-22 15:47:59,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:59,427 INFO L93 Difference]: Finished difference Result 472 states and 526 transitions. [2018-10-22 15:47:59,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-22 15:47:59,427 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 212 [2018-10-22 15:47:59,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:59,428 INFO L225 Difference]: With dead ends: 472 [2018-10-22 15:47:59,429 INFO L226 Difference]: Without dead ends: 341 [2018-10-22 15:47:59,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2173 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2781, Invalid=7931, Unknown=0, NotChecked=0, Total=10712 [2018-10-22 15:47:59,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2018-10-22 15:47:59,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 216. [2018-10-22 15:47:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-10-22 15:47:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 219 transitions. [2018-10-22 15:47:59,450 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 219 transitions. Word has length 212 [2018-10-22 15:47:59,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:59,451 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 219 transitions. [2018-10-22 15:47:59,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-22 15:47:59,451 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 219 transitions. [2018-10-22 15:47:59,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-10-22 15:47:59,451 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:59,452 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:59,452 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:59,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:59,452 INFO L82 PathProgramCache]: Analyzing trace with hash -138495071, now seen corresponding path program 36 times [2018-10-22 15:47:59,452 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:59,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:59,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:59,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:59,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 1575 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:00,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:00,481 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:00,489 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:48:00,696 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-22 15:48:00,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:00,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 1575 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:01,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:01,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 80 [2018-10-22 15:48:01,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-22 15:48:01,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-22 15:48:01,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1483, Invalid=4837, Unknown=0, NotChecked=0, Total=6320 [2018-10-22 15:48:01,993 INFO L87 Difference]: Start difference. First operand 216 states and 219 transitions. Second operand 80 states. [2018-10-22 15:48:03,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:03,682 INFO L93 Difference]: Finished difference Result 482 states and 538 transitions. [2018-10-22 15:48:03,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-22 15:48:03,682 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 215 [2018-10-22 15:48:03,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:03,685 INFO L225 Difference]: With dead ends: 482 [2018-10-22 15:48:03,685 INFO L226 Difference]: Without dead ends: 349 [2018-10-22 15:48:03,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2913, Invalid=8217, Unknown=0, NotChecked=0, Total=11130 [2018-10-22 15:48:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2018-10-22 15:48:03,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 219. [2018-10-22 15:48:03,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-22 15:48:03,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 222 transitions. [2018-10-22 15:48:03,711 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 222 transitions. Word has length 215 [2018-10-22 15:48:03,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:03,711 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 222 transitions. [2018-10-22 15:48:03,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-22 15:48:03,711 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 222 transitions. [2018-10-22 15:48:03,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-22 15:48:03,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:03,713 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:03,713 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:03,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:03,713 INFO L82 PathProgramCache]: Analyzing trace with hash -700453683, now seen corresponding path program 37 times [2018-10-22 15:48:03,713 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:03,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:03,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:03,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:03,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1053 proven. 1575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:04,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:04,406 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:04,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:04,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1053 proven. 1575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:04,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:04,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-10-22 15:48:04,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-22 15:48:04,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-22 15:48:04,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:48:04,653 INFO L87 Difference]: Start difference. First operand 219 states and 222 transitions. Second operand 32 states. [2018-10-22 15:48:05,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:05,226 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2018-10-22 15:48:05,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-22 15:48:05,227 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 218 [2018-10-22 15:48:05,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:05,229 INFO L225 Difference]: With dead ends: 235 [2018-10-22 15:48:05,229 INFO L226 Difference]: Without dead ends: 233 [2018-10-22 15:48:05,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2018-10-22 15:48:05,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-10-22 15:48:05,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2018-10-22 15:48:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-10-22 15:48:05,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 232 transitions. [2018-10-22 15:48:05,255 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 232 transitions. Word has length 218 [2018-10-22 15:48:05,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:05,256 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 232 transitions. [2018-10-22 15:48:05,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-22 15:48:05,256 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 232 transitions. [2018-10-22 15:48:05,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-22 15:48:05,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:05,257 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:05,257 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:05,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:05,258 INFO L82 PathProgramCache]: Analyzing trace with hash -508299027, now seen corresponding path program 38 times [2018-10-22 15:48:05,258 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:05,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:05,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:05,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:05,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:05,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 1836 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:06,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:06,361 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:06,368 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:48:06,457 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:48:06,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:06,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 1833 proven. 1053 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-22 15:48:07,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:07,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 84 [2018-10-22 15:48:07,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-22 15:48:07,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-22 15:48:07,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2018-10-22 15:48:07,778 INFO L87 Difference]: Start difference. First operand 229 states and 232 transitions. Second operand 84 states. [2018-10-22 15:48:09,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:09,377 INFO L93 Difference]: Finished difference Result 508 states and 566 transitions. [2018-10-22 15:48:09,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-22 15:48:09,377 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 228 [2018-10-22 15:48:09,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:09,379 INFO L225 Difference]: With dead ends: 508 [2018-10-22 15:48:09,379 INFO L226 Difference]: Without dead ends: 367 [2018-10-22 15:48:09,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3162, Invalid=9048, Unknown=0, NotChecked=0, Total=12210 [2018-10-22 15:48:09,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-10-22 15:48:09,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 232. [2018-10-22 15:48:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-22 15:48:09,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 235 transitions. [2018-10-22 15:48:09,406 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 235 transitions. Word has length 228 [2018-10-22 15:48:09,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:09,406 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 235 transitions. [2018-10-22 15:48:09,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-22 15:48:09,406 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 235 transitions. [2018-10-22 15:48:09,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-22 15:48:09,407 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:09,407 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:09,408 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:09,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:09,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1568075967, now seen corresponding path program 39 times [2018-10-22 15:48:09,408 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:09,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:09,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:09,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:09,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 1836 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:10,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:10,779 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:10,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:48:10,909 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-22 15:48:10,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:10,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 1836 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:12,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:12,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 86 [2018-10-22 15:48:12,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-22 15:48:12,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-22 15:48:12,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1709, Invalid=5601, Unknown=0, NotChecked=0, Total=7310 [2018-10-22 15:48:12,240 INFO L87 Difference]: Start difference. First operand 232 states and 235 transitions. Second operand 86 states. [2018-10-22 15:48:14,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:14,093 INFO L93 Difference]: Finished difference Result 518 states and 578 transitions. [2018-10-22 15:48:14,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-22 15:48:14,093 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 231 [2018-10-22 15:48:14,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:14,095 INFO L225 Difference]: With dead ends: 518 [2018-10-22 15:48:14,095 INFO L226 Difference]: Without dead ends: 375 [2018-10-22 15:48:14,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2592 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3361, Invalid=9521, Unknown=0, NotChecked=0, Total=12882 [2018-10-22 15:48:14,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-10-22 15:48:14,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 235. [2018-10-22 15:48:14,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-10-22 15:48:14,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 238 transitions. [2018-10-22 15:48:14,125 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 238 transitions. Word has length 231 [2018-10-22 15:48:14,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:14,126 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 238 transitions. [2018-10-22 15:48:14,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-22 15:48:14,126 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 238 transitions. [2018-10-22 15:48:14,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-10-22 15:48:14,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:14,127 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:14,127 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:14,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:14,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1078302611, now seen corresponding path program 40 times [2018-10-22 15:48:14,128 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:14,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:14,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:14,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:14,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3054 backedges. 1218 proven. 1836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:14,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:14,759 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:14,765 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:48:14,859 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:48:14,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:14,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3054 backedges. 1218 proven. 1836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:15,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:15,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2018-10-22 15:48:15,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:48:15,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:48:15,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:48:15,003 INFO L87 Difference]: Start difference. First operand 235 states and 238 transitions. Second operand 35 states. [2018-10-22 15:48:15,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:15,757 INFO L93 Difference]: Finished difference Result 256 states and 262 transitions. [2018-10-22 15:48:15,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-22 15:48:15,758 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 234 [2018-10-22 15:48:15,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:15,759 INFO L225 Difference]: With dead ends: 256 [2018-10-22 15:48:15,759 INFO L226 Difference]: Without dead ends: 254 [2018-10-22 15:48:15,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1462, Invalid=2570, Unknown=0, NotChecked=0, Total=4032 [2018-10-22 15:48:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-22 15:48:15,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 245. [2018-10-22 15:48:15,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-10-22 15:48:15,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 248 transitions. [2018-10-22 15:48:15,794 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 248 transitions. Word has length 234 [2018-10-22 15:48:15,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:15,795 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 248 transitions. [2018-10-22 15:48:15,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:48:15,795 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 248 transitions. [2018-10-22 15:48:15,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-10-22 15:48:15,797 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:15,797 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:15,797 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:15,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:15,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1417646963, now seen corresponding path program 41 times [2018-10-22 15:48:15,798 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:15,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:15,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:15,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:15,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 2117 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:17,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:17,204 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:17,213 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:48:17,355 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-22 15:48:17,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:17,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 2117 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:19,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:19,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 91 [2018-10-22 15:48:19,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-22 15:48:19,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-22 15:48:19,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1920, Invalid=6270, Unknown=0, NotChecked=0, Total=8190 [2018-10-22 15:48:19,902 INFO L87 Difference]: Start difference. First operand 245 states and 248 transitions. Second operand 91 states. [2018-10-22 15:48:21,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:21,529 INFO L93 Difference]: Finished difference Result 544 states and 606 transitions. [2018-10-22 15:48:21,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-22 15:48:21,530 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 244 [2018-10-22 15:48:21,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:21,532 INFO L225 Difference]: With dead ends: 544 [2018-10-22 15:48:21,532 INFO L226 Difference]: Without dead ends: 393 [2018-10-22 15:48:21,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2927 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3689, Invalid=10591, Unknown=0, NotChecked=0, Total=14280 [2018-10-22 15:48:21,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-10-22 15:48:21,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 248. [2018-10-22 15:48:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-10-22 15:48:21,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 251 transitions. [2018-10-22 15:48:21,564 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 251 transitions. Word has length 244 [2018-10-22 15:48:21,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:21,564 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 251 transitions. [2018-10-22 15:48:21,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-22 15:48:21,564 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 251 transitions. [2018-10-22 15:48:21,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-10-22 15:48:21,565 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:21,566 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:21,566 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:21,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:21,566 INFO L82 PathProgramCache]: Analyzing trace with hash 858151649, now seen corresponding path program 42 times [2018-10-22 15:48:21,566 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:21,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:21,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:21,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:21,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 2117 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:22,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:22,879 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:22,886 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:48:23,018 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-10-22 15:48:23,018 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:23,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:25,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 2117 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:25,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:25,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 92 [2018-10-22 15:48:25,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-22 15:48:25,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-22 15:48:25,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1951, Invalid=6421, Unknown=0, NotChecked=0, Total=8372 [2018-10-22 15:48:25,029 INFO L87 Difference]: Start difference. First operand 248 states and 251 transitions. Second operand 92 states. [2018-10-22 15:48:26,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:26,911 INFO L93 Difference]: Finished difference Result 554 states and 618 transitions. [2018-10-22 15:48:26,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-22 15:48:26,911 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 247 [2018-10-22 15:48:26,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:26,913 INFO L225 Difference]: With dead ends: 554 [2018-10-22 15:48:26,913 INFO L226 Difference]: Without dead ends: 401 [2018-10-22 15:48:26,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2987 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3841, Invalid=10921, Unknown=0, NotChecked=0, Total=14762 [2018-10-22 15:48:26,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2018-10-22 15:48:26,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 251. [2018-10-22 15:48:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-10-22 15:48:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 254 transitions. [2018-10-22 15:48:26,946 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 254 transitions. Word has length 247 [2018-10-22 15:48:26,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:26,946 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 254 transitions. [2018-10-22 15:48:26,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-22 15:48:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 254 transitions. [2018-10-22 15:48:26,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-10-22 15:48:26,947 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:26,947 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:26,947 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:26,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:26,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1179132915, now seen corresponding path program 43 times [2018-10-22 15:48:26,948 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:26,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:26,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:26,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:26,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3512 backedges. 1395 proven. 2117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:27,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:27,550 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:27,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:27,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3512 backedges. 1395 proven. 2117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:27,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:27,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-10-22 15:48:27,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-22 15:48:27,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-22 15:48:27,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:48:27,779 INFO L87 Difference]: Start difference. First operand 251 states and 254 transitions. Second operand 36 states. [2018-10-22 15:48:28,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:28,503 INFO L93 Difference]: Finished difference Result 267 states and 271 transitions. [2018-10-22 15:48:28,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-22 15:48:28,503 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 250 [2018-10-22 15:48:28,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:28,505 INFO L225 Difference]: With dead ends: 267 [2018-10-22 15:48:28,505 INFO L226 Difference]: Without dead ends: 265 [2018-10-22 15:48:28,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2018-10-22 15:48:28,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-10-22 15:48:28,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 261. [2018-10-22 15:48:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-10-22 15:48:28,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 264 transitions. [2018-10-22 15:48:28,534 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 264 transitions. Word has length 250 [2018-10-22 15:48:28,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:28,535 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 264 transitions. [2018-10-22 15:48:28,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-22 15:48:28,535 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 264 transitions. [2018-10-22 15:48:28,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-10-22 15:48:28,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:28,536 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:28,537 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:28,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:28,537 INFO L82 PathProgramCache]: Analyzing trace with hash -663103443, now seen corresponding path program 44 times [2018-10-22 15:48:28,537 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:28,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:28,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:28,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:28,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 2418 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:30,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:30,055 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:30,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:48:30,160 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:48:30,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:30,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 2415 proven. 1395 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-22 15:48:31,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:31,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64] total 96 [2018-10-22 15:48:31,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-22 15:48:31,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-22 15:48:31,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2111, Invalid=7009, Unknown=0, NotChecked=0, Total=9120 [2018-10-22 15:48:31,827 INFO L87 Difference]: Start difference. First operand 261 states and 264 transitions. Second operand 96 states. [2018-10-22 15:48:34,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:34,473 INFO L93 Difference]: Finished difference Result 580 states and 646 transitions. [2018-10-22 15:48:34,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-22 15:48:34,473 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 260 [2018-10-22 15:48:34,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:34,475 INFO L225 Difference]: With dead ends: 580 [2018-10-22 15:48:34,475 INFO L226 Difference]: Without dead ends: 419 [2018-10-22 15:48:34,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3285 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4126, Invalid=11876, Unknown=0, NotChecked=0, Total=16002 [2018-10-22 15:48:34,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2018-10-22 15:48:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 264. [2018-10-22 15:48:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-10-22 15:48:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 267 transitions. [2018-10-22 15:48:34,506 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 267 transitions. Word has length 260 [2018-10-22 15:48:34,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:34,506 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 267 transitions. [2018-10-22 15:48:34,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-22 15:48:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 267 transitions. [2018-10-22 15:48:34,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-10-22 15:48:34,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:34,508 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:34,508 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:34,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:34,508 INFO L82 PathProgramCache]: Analyzing trace with hash -633299327, now seen corresponding path program 45 times [2018-10-22 15:48:34,508 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:34,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:34,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:34,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:34,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 2418 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:36,046 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:36,046 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:36,053 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:48:36,215 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2018-10-22 15:48:36,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:36,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 2418 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:38,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:38,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 98 [2018-10-22 15:48:38,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-22 15:48:38,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-22 15:48:38,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2209, Invalid=7297, Unknown=0, NotChecked=0, Total=9506 [2018-10-22 15:48:38,057 INFO L87 Difference]: Start difference. First operand 264 states and 267 transitions. Second operand 98 states. [2018-10-22 15:48:40,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:40,448 INFO L93 Difference]: Finished difference Result 590 states and 658 transitions. [2018-10-22 15:48:40,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-22 15:48:40,448 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 263 [2018-10-22 15:48:40,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:40,450 INFO L225 Difference]: With dead ends: 590 [2018-10-22 15:48:40,450 INFO L226 Difference]: Without dead ends: 427 [2018-10-22 15:48:40,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3410 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4353, Invalid=12417, Unknown=0, NotChecked=0, Total=16770 [2018-10-22 15:48:40,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-10-22 15:48:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 267. [2018-10-22 15:48:40,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-10-22 15:48:40,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 270 transitions. [2018-10-22 15:48:40,497 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 270 transitions. Word has length 263 [2018-10-22 15:48:40,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:40,498 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 270 transitions. [2018-10-22 15:48:40,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-22 15:48:40,498 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 270 transitions. [2018-10-22 15:48:40,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-10-22 15:48:40,499 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:40,499 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:40,500 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:40,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:40,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1797109843, now seen corresponding path program 46 times [2018-10-22 15:48:40,500 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:40,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:40,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:40,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:40,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4002 backedges. 1584 proven. 2418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:41,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:41,205 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:41,213 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:48:41,316 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:48:41,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:41,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4002 backedges. 1584 proven. 2418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:41,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:41,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2018-10-22 15:48:41,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-22 15:48:41,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-22 15:48:41,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:48:41,526 INFO L87 Difference]: Start difference. First operand 267 states and 270 transitions. Second operand 39 states. [2018-10-22 15:48:42,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:42,358 INFO L93 Difference]: Finished difference Result 288 states and 294 transitions. [2018-10-22 15:48:42,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-22 15:48:42,359 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 266 [2018-10-22 15:48:42,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:42,360 INFO L225 Difference]: With dead ends: 288 [2018-10-22 15:48:42,360 INFO L226 Difference]: Without dead ends: 286 [2018-10-22 15:48:42,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1860, Invalid=3252, Unknown=0, NotChecked=0, Total=5112 [2018-10-22 15:48:42,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2018-10-22 15:48:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 277. [2018-10-22 15:48:42,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-10-22 15:48:42,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 280 transitions. [2018-10-22 15:48:42,390 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 280 transitions. Word has length 266 [2018-10-22 15:48:42,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:42,390 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 280 transitions. [2018-10-22 15:48:42,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-22 15:48:42,390 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 280 transitions. [2018-10-22 15:48:42,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-10-22 15:48:42,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:42,391 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:42,392 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:42,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:42,392 INFO L82 PathProgramCache]: Analyzing trace with hash -322290739, now seen corresponding path program 47 times [2018-10-22 15:48:42,392 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:42,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:42,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:42,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:42,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 2739 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:44,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:44,072 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:44,094 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:48:44,251 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-22 15:48:44,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:44,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 2739 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:46,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:46,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 103 [2018-10-22 15:48:46,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-22 15:48:46,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-22 15:48:46,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2448, Invalid=8058, Unknown=0, NotChecked=0, Total=10506 [2018-10-22 15:48:46,292 INFO L87 Difference]: Start difference. First operand 277 states and 280 transitions. Second operand 103 states. [2018-10-22 15:48:48,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:48,510 INFO L93 Difference]: Finished difference Result 616 states and 686 transitions. [2018-10-22 15:48:48,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-22 15:48:48,510 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 276 [2018-10-22 15:48:48,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:48,512 INFO L225 Difference]: With dead ends: 616 [2018-10-22 15:48:48,512 INFO L226 Difference]: Without dead ends: 445 [2018-10-22 15:48:48,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3793 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4725, Invalid=13635, Unknown=0, NotChecked=0, Total=18360 [2018-10-22 15:48:48,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2018-10-22 15:48:48,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 280. [2018-10-22 15:48:48,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-22 15:48:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 283 transitions. [2018-10-22 15:48:48,544 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 283 transitions. Word has length 276 [2018-10-22 15:48:48,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:48,544 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 283 transitions. [2018-10-22 15:48:48,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-22 15:48:48,544 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 283 transitions. [2018-10-22 15:48:48,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-22 15:48:48,545 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:48,545 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:48,546 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:48,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:48,546 INFO L82 PathProgramCache]: Analyzing trace with hash 2080496161, now seen corresponding path program 48 times [2018-10-22 15:48:48,546 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:48,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:48,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:48,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:48,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 2739 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:50,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:50,544 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:50,551 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:48:50,703 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-22 15:48:50,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:50,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 2739 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:52,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:52,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 104 [2018-10-22 15:48:52,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-22 15:48:52,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-22 15:48:52,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2483, Invalid=8229, Unknown=0, NotChecked=0, Total=10712 [2018-10-22 15:48:52,554 INFO L87 Difference]: Start difference. First operand 280 states and 283 transitions. Second operand 104 states. [2018-10-22 15:48:55,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:55,237 INFO L93 Difference]: Finished difference Result 626 states and 698 transitions. [2018-10-22 15:48:55,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-22 15:48:55,238 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 279 [2018-10-22 15:48:55,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:55,240 INFO L225 Difference]: With dead ends: 626 [2018-10-22 15:48:55,240 INFO L226 Difference]: Without dead ends: 453 [2018-10-22 15:48:55,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3861 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4897, Invalid=14009, Unknown=0, NotChecked=0, Total=18906 [2018-10-22 15:48:55,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2018-10-22 15:48:55,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 283. [2018-10-22 15:48:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-10-22 15:48:55,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 286 transitions. [2018-10-22 15:48:55,279 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 286 transitions. Word has length 279 [2018-10-22 15:48:55,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:55,279 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 286 transitions. [2018-10-22 15:48:55,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-22 15:48:55,279 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 286 transitions. [2018-10-22 15:48:55,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-10-22 15:48:55,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:55,281 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:55,281 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:55,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:55,281 INFO L82 PathProgramCache]: Analyzing trace with hash -714888371, now seen corresponding path program 49 times [2018-10-22 15:48:55,282 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:55,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:55,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:55,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:55,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4524 backedges. 1785 proven. 2739 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:55,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:55,947 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:55,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:56,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4524 backedges. 1785 proven. 2739 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:56,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:56,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-10-22 15:48:56,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:48:56,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:48:56,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:48:56,190 INFO L87 Difference]: Start difference. First operand 283 states and 286 transitions. Second operand 40 states. [2018-10-22 15:48:57,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:57,020 INFO L93 Difference]: Finished difference Result 299 states and 303 transitions. [2018-10-22 15:48:57,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-22 15:48:57,020 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 282 [2018-10-22 15:48:57,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:57,021 INFO L225 Difference]: With dead ends: 299 [2018-10-22 15:48:57,021 INFO L226 Difference]: Without dead ends: 297 [2018-10-22 15:48:57,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2018-10-22 15:48:57,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-10-22 15:48:57,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 293. [2018-10-22 15:48:57,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-10-22 15:48:57,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 296 transitions. [2018-10-22 15:48:57,076 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 296 transitions. Word has length 282 [2018-10-22 15:48:57,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:57,077 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 296 transitions. [2018-10-22 15:48:57,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:48:57,077 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 296 transitions. [2018-10-22 15:48:57,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-10-22 15:48:57,078 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:57,078 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:57,078 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:57,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:57,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1071933587, now seen corresponding path program 50 times [2018-10-22 15:48:57,079 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:57,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:57,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:57,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:57,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 3080 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:58,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:58,768 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:58,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:48:58,893 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:48:58,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:58,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 3077 proven. 1785 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-22 15:49:01,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:01,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72] total 108 [2018-10-22 15:49:01,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-22 15:49:01,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-22 15:49:01,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2663, Invalid=8893, Unknown=0, NotChecked=0, Total=11556 [2018-10-22 15:49:01,222 INFO L87 Difference]: Start difference. First operand 293 states and 296 transitions. Second operand 108 states. [2018-10-22 15:49:03,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:03,760 INFO L93 Difference]: Finished difference Result 652 states and 726 transitions. [2018-10-22 15:49:03,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-22 15:49:03,760 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 292 [2018-10-22 15:49:03,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:03,762 INFO L225 Difference]: With dead ends: 652 [2018-10-22 15:49:03,762 INFO L226 Difference]: Without dead ends: 471 [2018-10-22 15:49:03,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4199 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5218, Invalid=15088, Unknown=0, NotChecked=0, Total=20306 [2018-10-22 15:49:03,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2018-10-22 15:49:03,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 296. [2018-10-22 15:49:03,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2018-10-22 15:49:03,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 299 transitions. [2018-10-22 15:49:03,798 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 299 transitions. Word has length 292 [2018-10-22 15:49:03,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:03,798 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 299 transitions. [2018-10-22 15:49:03,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-22 15:49:03,798 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 299 transitions. [2018-10-22 15:49:03,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-10-22 15:49:03,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:03,799 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:03,799 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:03,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:03,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1343491521, now seen corresponding path program 51 times [2018-10-22 15:49:03,800 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:03,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:03,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:03,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:03,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 3080 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:05,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:05,873 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:49:05,882 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:49:06,054 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-22 15:49:06,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:06,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 3080 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:08,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:08,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 110 [2018-10-22 15:49:08,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-22 15:49:08,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-22 15:49:08,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2773, Invalid=9217, Unknown=0, NotChecked=0, Total=11990 [2018-10-22 15:49:08,167 INFO L87 Difference]: Start difference. First operand 296 states and 299 transitions. Second operand 110 states. [2018-10-22 15:49:11,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:11,144 INFO L93 Difference]: Finished difference Result 662 states and 738 transitions. [2018-10-22 15:49:11,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-22 15:49:11,144 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 295 [2018-10-22 15:49:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:11,146 INFO L225 Difference]: With dead ends: 662 [2018-10-22 15:49:11,146 INFO L226 Difference]: Without dead ends: 479 [2018-10-22 15:49:11,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4340 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5473, Invalid=15697, Unknown=0, NotChecked=0, Total=21170 [2018-10-22 15:49:11,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-10-22 15:49:11,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 299. [2018-10-22 15:49:11,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-10-22 15:49:11,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 302 transitions. [2018-10-22 15:49:11,187 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 302 transitions. Word has length 295 [2018-10-22 15:49:11,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:11,187 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 302 transitions. [2018-10-22 15:49:11,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-22 15:49:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 302 transitions. [2018-10-22 15:49:11,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-10-22 15:49:11,189 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:11,189 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:11,189 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:11,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:11,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1390806765, now seen corresponding path program 52 times [2018-10-22 15:49:11,190 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:11,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:11,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:11,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:11,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5078 backedges. 1998 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:11,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:11,917 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:49:11,927 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:49:12,050 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:49:12,050 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:12,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5078 backedges. 1998 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:12,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:12,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2018-10-22 15:49:12,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-22 15:49:12,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-22 15:49:12,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:49:12,205 INFO L87 Difference]: Start difference. First operand 299 states and 302 transitions. Second operand 43 states. [2018-10-22 15:49:13,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:13,195 INFO L93 Difference]: Finished difference Result 320 states and 326 transitions. [2018-10-22 15:49:13,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-22 15:49:13,195 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 298 [2018-10-22 15:49:13,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:13,197 INFO L225 Difference]: With dead ends: 320 [2018-10-22 15:49:13,197 INFO L226 Difference]: Without dead ends: 318 [2018-10-22 15:49:13,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2306, Invalid=4014, Unknown=0, NotChecked=0, Total=6320 [2018-10-22 15:49:13,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-10-22 15:49:13,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 309. [2018-10-22 15:49:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-10-22 15:49:13,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 312 transitions. [2018-10-22 15:49:13,243 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 312 transitions. Word has length 298 [2018-10-22 15:49:13,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:13,243 INFO L481 AbstractCegarLoop]: Abstraction has 309 states and 312 transitions. [2018-10-22 15:49:13,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-22 15:49:13,244 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 312 transitions. [2018-10-22 15:49:13,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-10-22 15:49:13,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:13,245 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:13,245 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:13,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:13,246 INFO L82 PathProgramCache]: Analyzing trace with hash 496495373, now seen corresponding path program 53 times [2018-10-22 15:49:13,246 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:13,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:13,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:13,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:13,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 3441 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:15,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:15,373 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:49:15,386 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:49:15,568 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2018-10-22 15:49:15,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:15,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 3441 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:17,925 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:17,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 115 [2018-10-22 15:49:17,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-10-22 15:49:17,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-10-22 15:49:17,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3040, Invalid=10070, Unknown=0, NotChecked=0, Total=13110 [2018-10-22 15:49:17,927 INFO L87 Difference]: Start difference. First operand 309 states and 312 transitions. Second operand 115 states. [2018-10-22 15:49:21,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:21,070 INFO L93 Difference]: Finished difference Result 688 states and 766 transitions. [2018-10-22 15:49:21,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-22 15:49:21,071 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 308 [2018-10-22 15:49:21,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:21,073 INFO L225 Difference]: With dead ends: 688 [2018-10-22 15:49:21,073 INFO L226 Difference]: Without dead ends: 497 [2018-10-22 15:49:21,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4771 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5889, Invalid=17063, Unknown=0, NotChecked=0, Total=22952 [2018-10-22 15:49:21,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2018-10-22 15:49:21,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 312. [2018-10-22 15:49:21,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2018-10-22 15:49:21,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 315 transitions. [2018-10-22 15:49:21,112 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 315 transitions. Word has length 308 [2018-10-22 15:49:21,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:21,112 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 315 transitions. [2018-10-22 15:49:21,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-10-22 15:49:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 315 transitions. [2018-10-22 15:49:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2018-10-22 15:49:21,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:21,114 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:21,114 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:21,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:21,114 INFO L82 PathProgramCache]: Analyzing trace with hash -2120140447, now seen corresponding path program 54 times [2018-10-22 15:49:21,114 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:21,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:21,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:21,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:21,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 3441 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:23,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:23,025 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:49:23,033 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:49:23,211 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-22 15:49:23,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:23,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 3441 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:25,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:25,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 116 [2018-10-22 15:49:25,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-22 15:49:25,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-22 15:49:25,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3079, Invalid=10261, Unknown=0, NotChecked=0, Total=13340 [2018-10-22 15:49:25,901 INFO L87 Difference]: Start difference. First operand 312 states and 315 transitions. Second operand 116 states. [2018-10-22 15:49:28,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:28,642 INFO L93 Difference]: Finished difference Result 698 states and 778 transitions. [2018-10-22 15:49:28,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-22 15:49:28,643 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 311 [2018-10-22 15:49:28,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:28,644 INFO L225 Difference]: With dead ends: 698 [2018-10-22 15:49:28,644 INFO L226 Difference]: Without dead ends: 505 [2018-10-22 15:49:28,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4847 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=6081, Invalid=17481, Unknown=0, NotChecked=0, Total=23562 [2018-10-22 15:49:28,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2018-10-22 15:49:28,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 315. [2018-10-22 15:49:28,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-22 15:49:28,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 318 transitions. [2018-10-22 15:49:28,684 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 318 transitions. Word has length 311 [2018-10-22 15:49:28,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:28,684 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 318 transitions. [2018-10-22 15:49:28,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-22 15:49:28,684 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 318 transitions. [2018-10-22 15:49:28,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-10-22 15:49:28,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:28,686 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:28,686 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:28,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:28,686 INFO L82 PathProgramCache]: Analyzing trace with hash -661431667, now seen corresponding path program 55 times [2018-10-22 15:49:28,686 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:28,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:28,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:28,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:28,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5664 backedges. 2223 proven. 3441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:29,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:29,477 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:49:29,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:29,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:29,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5664 backedges. 2223 proven. 3441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:29,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:29,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-10-22 15:49:29,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-22 15:49:29,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-22 15:49:29,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:49:29,975 INFO L87 Difference]: Start difference. First operand 315 states and 318 transitions. Second operand 44 states. [2018-10-22 15:49:31,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:31,170 INFO L93 Difference]: Finished difference Result 331 states and 335 transitions. [2018-10-22 15:49:31,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-22 15:49:31,170 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 314 [2018-10-22 15:49:31,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:31,171 INFO L225 Difference]: With dead ends: 331 [2018-10-22 15:49:31,171 INFO L226 Difference]: Without dead ends: 329 [2018-10-22 15:49:31,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2018-10-22 15:49:31,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2018-10-22 15:49:31,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 325. [2018-10-22 15:49:31,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-10-22 15:49:31,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 328 transitions. [2018-10-22 15:49:31,212 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 328 transitions. Word has length 314 [2018-10-22 15:49:31,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:31,212 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 328 transitions. [2018-10-22 15:49:31,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-22 15:49:31,212 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 328 transitions. [2018-10-22 15:49:31,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2018-10-22 15:49:31,213 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:31,213 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:31,214 INFO L424 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:31,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:31,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1676228269, now seen corresponding path program 56 times [2018-10-22 15:49:31,214 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:31,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:31,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:31,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:31,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6045 backedges. 3822 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:33,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:33,475 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:49:33,482 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:49:33,609 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:49:33,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:33,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6045 backedges. 3819 proven. 2223 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-22 15:49:36,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:36,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80] total 120 [2018-10-22 15:49:36,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-22 15:49:36,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-22 15:49:36,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3279, Invalid=11001, Unknown=0, NotChecked=0, Total=14280 [2018-10-22 15:49:36,408 INFO L87 Difference]: Start difference. First operand 325 states and 328 transitions. Second operand 120 states. [2018-10-22 15:49:39,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:39,284 INFO L93 Difference]: Finished difference Result 724 states and 806 transitions. [2018-10-22 15:49:39,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-22 15:49:39,284 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 324 [2018-10-22 15:49:39,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:39,286 INFO L225 Difference]: With dead ends: 724 [2018-10-22 15:49:39,286 INFO L226 Difference]: Without dead ends: 523 [2018-10-22 15:49:39,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5225 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=6438, Invalid=18684, Unknown=0, NotChecked=0, Total=25122 [2018-10-22 15:49:39,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2018-10-22 15:49:39,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 328. [2018-10-22 15:49:39,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-10-22 15:49:39,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 331 transitions. [2018-10-22 15:49:39,329 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 331 transitions. Word has length 324 [2018-10-22 15:49:39,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:39,329 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 331 transitions. [2018-10-22 15:49:39,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-22 15:49:39,329 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 331 transitions. [2018-10-22 15:49:39,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-10-22 15:49:39,330 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:39,331 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:39,331 INFO L424 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:39,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:39,331 INFO L82 PathProgramCache]: Analyzing trace with hash -816620287, now seen corresponding path program 57 times [2018-10-22 15:49:39,331 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:39,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:39,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:39,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:39,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 3822 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:41,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:41,746 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:49:41,755 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:49:41,954 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-22 15:49:41,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:41,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 3822 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:44,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:44,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 122 [2018-10-22 15:49:44,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-22 15:49:44,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-22 15:49:44,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3401, Invalid=11361, Unknown=0, NotChecked=0, Total=14762 [2018-10-22 15:49:44,533 INFO L87 Difference]: Start difference. First operand 328 states and 331 transitions. Second operand 122 states. [2018-10-22 15:49:47,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:47,750 INFO L93 Difference]: Finished difference Result 734 states and 818 transitions. [2018-10-22 15:49:47,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-22 15:49:47,750 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 327 [2018-10-22 15:49:47,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:47,753 INFO L225 Difference]: With dead ends: 734 [2018-10-22 15:49:47,753 INFO L226 Difference]: Without dead ends: 531 [2018-10-22 15:49:47,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5382 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=6721, Invalid=19361, Unknown=0, NotChecked=0, Total=26082 [2018-10-22 15:49:47,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-10-22 15:49:47,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 331. [2018-10-22 15:49:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-10-22 15:49:47,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 334 transitions. [2018-10-22 15:49:47,796 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 334 transitions. Word has length 327 [2018-10-22 15:49:47,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:47,797 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 334 transitions. [2018-10-22 15:49:47,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-22 15:49:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 334 transitions. [2018-10-22 15:49:47,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-10-22 15:49:47,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:47,798 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:47,798 INFO L424 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:47,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:47,799 INFO L82 PathProgramCache]: Analyzing trace with hash -988436947, now seen corresponding path program 58 times [2018-10-22 15:49:47,799 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:47,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:47,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:47,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:47,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6282 backedges. 2460 proven. 3822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:48,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:48,709 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:49:48,716 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:49:48,852 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:49:48,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:48,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6282 backedges. 2460 proven. 3822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:49,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:49,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 47 [2018-10-22 15:49:49,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-22 15:49:49,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-22 15:49:49,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:49:49,012 INFO L87 Difference]: Start difference. First operand 331 states and 334 transitions. Second operand 47 states. [2018-10-22 15:49:50,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:50,220 INFO L93 Difference]: Finished difference Result 352 states and 358 transitions. [2018-10-22 15:49:50,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-22 15:49:50,220 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 330 [2018-10-22 15:49:50,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:50,221 INFO L225 Difference]: With dead ends: 352 [2018-10-22 15:49:50,221 INFO L226 Difference]: Without dead ends: 350 [2018-10-22 15:49:50,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2800, Invalid=4856, Unknown=0, NotChecked=0, Total=7656 [2018-10-22 15:49:50,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-10-22 15:49:50,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 341. [2018-10-22 15:49:50,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-10-22 15:49:50,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 344 transitions. [2018-10-22 15:49:50,265 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 344 transitions. Word has length 330 [2018-10-22 15:49:50,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:50,265 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 344 transitions. [2018-10-22 15:49:50,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-22 15:49:50,265 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 344 transitions. [2018-10-22 15:49:50,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-10-22 15:49:50,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:50,267 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:50,267 INFO L424 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:50,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:50,267 INFO L82 PathProgramCache]: Analyzing trace with hash 624523853, now seen corresponding path program 59 times [2018-10-22 15:49:50,267 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:50,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:50,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:50,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:50,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6683 backedges. 4223 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:53,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:53,187 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:49:53,196 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:49:53,409 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-22 15:49:53,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:53,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6683 backedges. 4223 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:56,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:56,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 127 [2018-10-22 15:49:56,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-10-22 15:49:56,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-10-22 15:49:56,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3696, Invalid=12306, Unknown=0, NotChecked=0, Total=16002 [2018-10-22 15:49:56,494 INFO L87 Difference]: Start difference. First operand 341 states and 344 transitions. Second operand 127 states. [2018-10-22 15:49:59,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:59,392 INFO L93 Difference]: Finished difference Result 760 states and 846 transitions. [2018-10-22 15:49:59,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-22 15:49:59,393 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 340 [2018-10-22 15:49:59,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:59,394 INFO L225 Difference]: With dead ends: 760 [2018-10-22 15:49:59,395 INFO L226 Difference]: Without dead ends: 549 [2018-10-22 15:49:59,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5861 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=7181, Invalid=20875, Unknown=0, NotChecked=0, Total=28056 [2018-10-22 15:49:59,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2018-10-22 15:49:59,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 344. [2018-10-22 15:49:59,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2018-10-22 15:49:59,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 347 transitions. [2018-10-22 15:49:59,443 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 347 transitions. Word has length 340 [2018-10-22 15:49:59,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:59,443 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 347 transitions. [2018-10-22 15:49:59,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-10-22 15:49:59,443 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 347 transitions. [2018-10-22 15:49:59,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2018-10-22 15:49:59,444 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:59,444 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:59,444 INFO L424 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:59,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:59,445 INFO L82 PathProgramCache]: Analyzing trace with hash 726956193, now seen corresponding path program 60 times [2018-10-22 15:49:59,445 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:59,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:59,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:59,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:59,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 4223 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:02,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:02,093 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:02,103 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:02,311 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2018-10-22 15:50:02,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:02,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 4223 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:05,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:05,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 128 [2018-10-22 15:50:05,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-10-22 15:50:05,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-10-22 15:50:05,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3739, Invalid=12517, Unknown=0, NotChecked=0, Total=16256 [2018-10-22 15:50:05,205 INFO L87 Difference]: Start difference. First operand 344 states and 347 transitions. Second operand 128 states. [2018-10-22 15:50:08,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:08,559 INFO L93 Difference]: Finished difference Result 770 states and 858 transitions. [2018-10-22 15:50:08,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-22 15:50:08,560 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 343 [2018-10-22 15:50:08,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:08,562 INFO L225 Difference]: With dead ends: 770 [2018-10-22 15:50:08,562 INFO L226 Difference]: Without dead ends: 557 [2018-10-22 15:50:08,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5945 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=7393, Invalid=21337, Unknown=0, NotChecked=0, Total=28730 [2018-10-22 15:50:08,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2018-10-22 15:50:08,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 347. [2018-10-22 15:50:08,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-10-22 15:50:08,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 350 transitions. [2018-10-22 15:50:08,609 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 350 transitions. Word has length 343 [2018-10-22 15:50:08,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:08,609 INFO L481 AbstractCegarLoop]: Abstraction has 347 states and 350 transitions. [2018-10-22 15:50:08,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-10-22 15:50:08,609 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 350 transitions. [2018-10-22 15:50:08,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-10-22 15:50:08,611 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:08,611 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:08,611 INFO L424 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:08,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:08,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1432950323, now seen corresponding path program 61 times [2018-10-22 15:50:08,612 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:08,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:08,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:08,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:08,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6932 backedges. 2709 proven. 4223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:09,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:09,594 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:09,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:09,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:09,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6932 backedges. 2709 proven. 4223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:09,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:09,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-10-22 15:50:09,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-22 15:50:09,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-22 15:50:09,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:50:09,913 INFO L87 Difference]: Start difference. First operand 347 states and 350 transitions. Second operand 48 states. [2018-10-22 15:50:11,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:11,014 INFO L93 Difference]: Finished difference Result 363 states and 367 transitions. [2018-10-22 15:50:11,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-22 15:50:11,014 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 346 [2018-10-22 15:50:11,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:11,016 INFO L225 Difference]: With dead ends: 363 [2018-10-22 15:50:11,016 INFO L226 Difference]: Without dead ends: 361 [2018-10-22 15:50:11,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3062, Invalid=5128, Unknown=0, NotChecked=0, Total=8190 [2018-10-22 15:50:11,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2018-10-22 15:50:11,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 357. [2018-10-22 15:50:11,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2018-10-22 15:50:11,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 360 transitions. [2018-10-22 15:50:11,065 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 360 transitions. Word has length 346 [2018-10-22 15:50:11,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:11,066 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 360 transitions. [2018-10-22 15:50:11,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-22 15:50:11,066 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 360 transitions. [2018-10-22 15:50:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2018-10-22 15:50:11,067 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:11,067 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:11,068 INFO L424 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:11,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:11,068 INFO L82 PathProgramCache]: Analyzing trace with hash -952977939, now seen corresponding path program 62 times [2018-10-22 15:50:11,068 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:11,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:11,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:11,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:11,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7353 backedges. 4644 proven. 2709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:13,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:13,839 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:13,846 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:13,985 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:13,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:13,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7353 backedges. 4641 proven. 2709 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-22 15:50:17,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:17,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88] total 132 [2018-10-22 15:50:17,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-22 15:50:17,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-22 15:50:17,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3959, Invalid=13333, Unknown=0, NotChecked=0, Total=17292 [2018-10-22 15:50:17,314 INFO L87 Difference]: Start difference. First operand 357 states and 360 transitions. Second operand 132 states. [2018-10-22 15:50:20,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:20,829 INFO L93 Difference]: Finished difference Result 796 states and 886 transitions. [2018-10-22 15:50:20,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-22 15:50:20,829 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 356 [2018-10-22 15:50:20,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:20,831 INFO L225 Difference]: With dead ends: 796 [2018-10-22 15:50:20,831 INFO L226 Difference]: Without dead ends: 575 [2018-10-22 15:50:20,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6363 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=7786, Invalid=22664, Unknown=0, NotChecked=0, Total=30450 [2018-10-22 15:50:20,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2018-10-22 15:50:20,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 360. [2018-10-22 15:50:20,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2018-10-22 15:50:20,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 363 transitions. [2018-10-22 15:50:20,877 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 363 transitions. Word has length 356 [2018-10-22 15:50:20,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:20,878 INFO L481 AbstractCegarLoop]: Abstraction has 360 states and 363 transitions. [2018-10-22 15:50:20,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-10-22 15:50:20,878 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 363 transitions. [2018-10-22 15:50:20,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-10-22 15:50:20,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:20,879 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:20,879 INFO L424 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:20,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:20,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1531874369, now seen corresponding path program 63 times [2018-10-22 15:50:20,880 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:20,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:20,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:20,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:20,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 4644 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:23,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:23,731 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:23,738 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:23,963 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-10-22 15:50:23,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:23,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 4644 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:27,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:27,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 134 [2018-10-22 15:50:27,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-22 15:50:27,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-22 15:50:27,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4093, Invalid=13729, Unknown=0, NotChecked=0, Total=17822 [2018-10-22 15:50:27,378 INFO L87 Difference]: Start difference. First operand 360 states and 363 transitions. Second operand 134 states. [2018-10-22 15:50:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:31,050 INFO L93 Difference]: Finished difference Result 806 states and 898 transitions. [2018-10-22 15:50:31,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-22 15:50:31,051 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 359 [2018-10-22 15:50:31,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:31,053 INFO L225 Difference]: With dead ends: 806 [2018-10-22 15:50:31,053 INFO L226 Difference]: Without dead ends: 583 [2018-10-22 15:50:31,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6536 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=8097, Invalid=23409, Unknown=0, NotChecked=0, Total=31506 [2018-10-22 15:50:31,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2018-10-22 15:50:31,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 363. [2018-10-22 15:50:31,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2018-10-22 15:50:31,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 366 transitions. [2018-10-22 15:50:31,105 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 366 transitions. Word has length 359 [2018-10-22 15:50:31,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:31,105 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 366 transitions. [2018-10-22 15:50:31,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-22 15:50:31,105 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 366 transitions. [2018-10-22 15:50:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-10-22 15:50:31,107 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:31,107 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:31,107 INFO L424 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:31,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:31,107 INFO L82 PathProgramCache]: Analyzing trace with hash -289331859, now seen corresponding path program 64 times [2018-10-22 15:50:31,107 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:31,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:31,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:31,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:31,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7614 backedges. 2970 proven. 4644 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:32,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:32,453 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:32,461 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:32,616 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:32,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:32,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7614 backedges. 2970 proven. 4644 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:32,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:32,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 51 [2018-10-22 15:50:32,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-22 15:50:32,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-22 15:50:32,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 15:50:32,802 INFO L87 Difference]: Start difference. First operand 363 states and 366 transitions. Second operand 51 states. [2018-10-22 15:50:34,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:34,159 INFO L93 Difference]: Finished difference Result 384 states and 390 transitions. [2018-10-22 15:50:34,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-22 15:50:34,159 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 362 [2018-10-22 15:50:34,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:34,161 INFO L225 Difference]: With dead ends: 384 [2018-10-22 15:50:34,161 INFO L226 Difference]: Without dead ends: 382 [2018-10-22 15:50:34,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2115 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3342, Invalid=5778, Unknown=0, NotChecked=0, Total=9120 [2018-10-22 15:50:34,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2018-10-22 15:50:34,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 373. [2018-10-22 15:50:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2018-10-22 15:50:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 376 transitions. [2018-10-22 15:50:34,213 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 376 transitions. Word has length 362 [2018-10-22 15:50:34,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:34,214 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 376 transitions. [2018-10-22 15:50:34,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-22 15:50:34,214 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 376 transitions. [2018-10-22 15:50:34,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2018-10-22 15:50:34,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:34,215 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 45, 45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:34,216 INFO L424 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:34,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:34,216 INFO L82 PathProgramCache]: Analyzing trace with hash 587131277, now seen corresponding path program 65 times [2018-10-22 15:50:34,216 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:34,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:34,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:34,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:34,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8055 backedges. 5085 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:37,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:37,158 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:37,165 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:37,403 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-22 15:50:37,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:37,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8055 backedges. 5085 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:40,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:40,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 139 [2018-10-22 15:50:40,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-10-22 15:50:40,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-10-22 15:50:40,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4416, Invalid=14766, Unknown=0, NotChecked=0, Total=19182 [2018-10-22 15:50:40,790 INFO L87 Difference]: Start difference. First operand 373 states and 376 transitions. Second operand 139 states. [2018-10-22 15:50:44,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:44,775 INFO L93 Difference]: Finished difference Result 832 states and 926 transitions. [2018-10-22 15:50:44,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-22 15:50:44,775 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 372 [2018-10-22 15:50:44,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:44,777 INFO L225 Difference]: With dead ends: 832 [2018-10-22 15:50:44,777 INFO L226 Difference]: Without dead ends: 601 [2018-10-22 15:50:44,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7063 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=8601, Invalid=25071, Unknown=0, NotChecked=0, Total=33672 [2018-10-22 15:50:44,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2018-10-22 15:50:44,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 376. [2018-10-22 15:50:44,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-10-22 15:50:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 379 transitions. [2018-10-22 15:50:44,836 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 379 transitions. Word has length 372 [2018-10-22 15:50:44,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:44,837 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 379 transitions. [2018-10-22 15:50:44,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-10-22 15:50:44,837 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 379 transitions. [2018-10-22 15:50:44,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-10-22 15:50:44,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:44,838 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:44,838 INFO L424 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:44,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:44,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1737779231, now seen corresponding path program 66 times [2018-10-22 15:50:44,839 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:44,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:44,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:44,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:44,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 5085 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:47,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:47,872 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:47,879 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:48,131 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-22 15:50:48,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:48,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-22 15:50:49,872 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-22 15:50:50,073 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:50,074 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 15:50:50,079 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 15:50:50,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:50:50 BoogieIcfgContainer [2018-10-22 15:50:50,079 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:50:50,080 INFO L168 Benchmark]: Toolchain (without parser) took 238749.55 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 733.0 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -541.3 MB). Peak memory consumption was 191.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:50:50,081 INFO L168 Benchmark]: CDTParser took 0.21 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 15:50:50,081 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.96 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 15:50:50,082 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.54 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 15:50:50,082 INFO L168 Benchmark]: Boogie Preprocessor took 23.22 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 15:50:50,082 INFO L168 Benchmark]: RCFGBuilder took 473.75 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -806.6 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-10-22 15:50:50,083 INFO L168 Benchmark]: TraceAbstraction took 237946.74 ms. Allocated memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: -23.1 MB). Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 254.7 MB). Peak memory consumption was 231.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:50:50,085 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 266.96 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 34.54 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 23.22 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 473.75 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -806.6 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 237946.74 ms. Allocated memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: -23.1 MB). Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 254.7 MB). Peak memory consumption was 231.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 376 with TraceHistMax 46,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 122 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 1 error locations. TIMEOUT Result, 237.8s OverallTime, 69 OverallIterations, 46 TraceHistogramMax, 87.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4767 SDtfs, 15538 SDslu, 55908 SDs, 0 SdLazy, 41312 SolverSat, 6187 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 33.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17749 GetRequests, 12430 SyntacticMatches, 0 SemanticMatches, 5319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123470 ImplicationChecksByTransitivity, 154.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=376occurred in iteration=68, 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: 1.6s AutomataMinimizationTime, 68 MinimizatonAttempts, 5320 StatesRemovedByMinimization, 67 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 7.2s SatisfiabilityAnalysisTime, 129.8s InterpolantComputationTime, 25900 NumberOfCodeBlocks, 25900 NumberOfCodeBlocksAsserted, 913 NumberOfCheckSat, 25767 ConstructedInterpolants, 0 QuantifiedInterpolants, 26449354 SizeOfPredicates, 217 NumberOfNonLiveVariables, 38066 ConjunctsInSsa, 3345 ConjunctsInUnsatCore, 133 InterpolantComputations, 3 PerfectInterpolantSequences, 200047/362557 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown