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/eca-rers2012/Problem16_label03_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 19:26:11,541 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 19:26:11,544 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 19:26:11,562 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 19:26:11,563 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 19:26:11,564 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 19:26:11,567 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 19:26:11,570 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 19:26:11,573 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 19:26:11,575 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 19:26:11,576 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 19:26:11,576 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 19:26:11,579 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 19:26:11,580 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 19:26:11,582 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 19:26:11,591 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 19:26:11,592 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 19:26:11,594 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 19:26:11,597 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 19:26:11,600 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 19:26:11,602 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 19:26:11,604 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 19:26:11,606 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 19:26:11,606 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 19:26:11,606 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 19:26:11,607 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 19:26:11,608 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 19:26:11,609 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 19:26:11,610 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 19:26:11,611 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 19:26:11,611 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 19:26:11,612 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-26 19:26:11,614 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 [2018-10-26 19:26:11,628 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 19:26:11,629 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 19:26:11,630 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 19:26:11,630 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 19:26:11,631 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 19:26:11,631 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 19:26:11,631 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 19:26:11,631 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 19:26:11,632 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 19:26:11,632 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 19:26:11,632 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 19:26:11,632 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 19:26:11,632 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 19:26:11,633 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 19:26:11,633 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 19:26:11,633 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 19:26:11,633 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 19:26:11,633 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 19:26:11,634 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 19:26:11,634 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 19:26:11,634 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 19:26:11,634 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 19:26:11,635 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 19:26:11,635 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 19:26:11,635 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 19:26:11,635 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 19:26:11,636 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 19:26:11,636 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 19:26:11,691 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 19:26:11,706 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 19:26:11,710 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 19:26:11,712 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 19:26:11,713 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 19:26:11,714 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label03_false-unreach-call.c [2018-10-26 19:26:11,797 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/beac48f36/e7c55a6c37ce45a0a408992d78a1c1da/FLAGb9d85cf79 [2018-10-26 19:26:12,471 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 19:26:12,472 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label03_false-unreach-call.c [2018-10-26 19:26:12,491 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/beac48f36/e7c55a6c37ce45a0a408992d78a1c1da/FLAGb9d85cf79 [2018-10-26 19:26:12,513 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/beac48f36/e7c55a6c37ce45a0a408992d78a1c1da [2018-10-26 19:26:12,526 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 19:26:12,528 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 19:26:12,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 19:26:12,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 19:26:12,535 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 19:26:12,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:26:12" (1/1) ... [2018-10-26 19:26:12,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@769a0e85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:12, skipping insertion in model container [2018-10-26 19:26:12,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:26:12" (1/1) ... [2018-10-26 19:26:12,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 19:26:12,658 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 19:26:13,641 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 19:26:13,646 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 19:26:13,948 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 19:26:13,972 INFO L193 MainTranslator]: Completed translation [2018-10-26 19:26:13,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:13 WrapperNode [2018-10-26 19:26:13,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 19:26:13,974 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 19:26:13,974 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 19:26:13,974 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 19:26:13,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:13" (1/1) ... [2018-10-26 19:26:14,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:13" (1/1) ... [2018-10-26 19:26:14,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 19:26:14,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 19:26:14,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 19:26:14,335 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 19:26:14,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:13" (1/1) ... [2018-10-26 19:26:14,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:13" (1/1) ... [2018-10-26 19:26:14,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:13" (1/1) ... [2018-10-26 19:26:14,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:13" (1/1) ... [2018-10-26 19:26:14,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:13" (1/1) ... [2018-10-26 19:26:14,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:13" (1/1) ... [2018-10-26 19:26:14,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:13" (1/1) ... [2018-10-26 19:26:14,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 19:26:14,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 19:26:14,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 19:26:14,483 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 19:26:14,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:13" (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 [2018-10-26 19:26:14,553 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-26 19:26:14,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 19:26:14,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 19:26:20,419 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 19:26:20,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:26:20 BoogieIcfgContainer [2018-10-26 19:26:20,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 19:26:20,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 19:26:20,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 19:26:20,426 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 19:26:20,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:26:12" (1/3) ... [2018-10-26 19:26:20,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b900af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:26:20, skipping insertion in model container [2018-10-26 19:26:20,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:13" (2/3) ... [2018-10-26 19:26:20,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b900af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:26:20, skipping insertion in model container [2018-10-26 19:26:20,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:26:20" (3/3) ... [2018-10-26 19:26:20,433 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label03_false-unreach-call.c [2018-10-26 19:26:20,442 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 19:26:20,451 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 19:26:20,473 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 19:26:20,526 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 19:26:20,527 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 19:26:20,527 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 19:26:20,527 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 19:26:20,528 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 19:26:20,528 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 19:26:20,528 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 19:26:20,528 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 19:26:20,528 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 19:26:20,560 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states. [2018-10-26 19:26:20,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-26 19:26:20,567 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:26:20,569 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:26:20,571 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:26:20,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:26:20,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1805984234, now seen corresponding path program 1 times [2018-10-26 19:26:20,580 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:26:20,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:26:20,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:20,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:26:20,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:26:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:26:20,774 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:26:20,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 19:26:20,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 19:26:20,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 19:26:20,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 19:26:20,799 INFO L87 Difference]: Start difference. First operand 397 states. Second operand 3 states. [2018-10-26 19:26:24,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:26:24,355 INFO L93 Difference]: Finished difference Result 1125 states and 2106 transitions. [2018-10-26 19:26:24,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 19:26:24,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-26 19:26:24,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:26:24,384 INFO L225 Difference]: With dead ends: 1125 [2018-10-26 19:26:24,384 INFO L226 Difference]: Without dead ends: 724 [2018-10-26 19:26:24,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 19:26:24,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2018-10-26 19:26:24,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 724. [2018-10-26 19:26:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-10-26 19:26:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1169 transitions. [2018-10-26 19:26:24,495 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1169 transitions. Word has length 7 [2018-10-26 19:26:24,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:26:24,495 INFO L481 AbstractCegarLoop]: Abstraction has 724 states and 1169 transitions. [2018-10-26 19:26:24,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 19:26:24,496 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1169 transitions. [2018-10-26 19:26:24,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-26 19:26:24,499 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:26:24,499 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:26:24,500 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:26:24,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:26:24,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1276437618, now seen corresponding path program 1 times [2018-10-26 19:26:24,501 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:26:24,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:26:24,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:24,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:26:24,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:26:24,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:26:24,834 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:26:24,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 19:26:24,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:26:24,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:26:24,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:26:24,838 INFO L87 Difference]: Start difference. First operand 724 states and 1169 transitions. Second operand 4 states. [2018-10-26 19:26:31,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:26:31,319 INFO L93 Difference]: Finished difference Result 2781 states and 4563 transitions. [2018-10-26 19:26:31,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:26:31,320 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2018-10-26 19:26:31,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:26:31,332 INFO L225 Difference]: With dead ends: 2781 [2018-10-26 19:26:31,333 INFO L226 Difference]: Without dead ends: 2059 [2018-10-26 19:26:31,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:26:31,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2018-10-26 19:26:31,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1384. [2018-10-26 19:26:31,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2018-10-26 19:26:31,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2143 transitions. [2018-10-26 19:26:31,398 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2143 transitions. Word has length 79 [2018-10-26 19:26:31,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:26:31,399 INFO L481 AbstractCegarLoop]: Abstraction has 1384 states and 2143 transitions. [2018-10-26 19:26:31,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:26:31,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2143 transitions. [2018-10-26 19:26:31,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-26 19:26:31,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:26:31,402 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:26:31,402 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:26:31,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:26:31,402 INFO L82 PathProgramCache]: Analyzing trace with hash 304108284, now seen corresponding path program 1 times [2018-10-26 19:26:31,403 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:26:31,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:26:31,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:31,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:26:31,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:26:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:26:31,584 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:26:31,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 19:26:31,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:26:31,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:26:31,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:26:31,585 INFO L87 Difference]: Start difference. First operand 1384 states and 2143 transitions. Second operand 4 states. [2018-10-26 19:26:36,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:26:36,190 INFO L93 Difference]: Finished difference Result 3426 states and 5150 transitions. [2018-10-26 19:26:36,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:26:36,191 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2018-10-26 19:26:36,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:26:36,203 INFO L225 Difference]: With dead ends: 3426 [2018-10-26 19:26:36,203 INFO L226 Difference]: Without dead ends: 2044 [2018-10-26 19:26:36,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:26:36,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2018-10-26 19:26:36,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 2044. [2018-10-26 19:26:36,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2044 states. [2018-10-26 19:26:36,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 2793 transitions. [2018-10-26 19:26:36,256 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 2793 transitions. Word has length 83 [2018-10-26 19:26:36,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:26:36,257 INFO L481 AbstractCegarLoop]: Abstraction has 2044 states and 2793 transitions. [2018-10-26 19:26:36,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:26:36,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 2793 transitions. [2018-10-26 19:26:36,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-26 19:26:36,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:26:36,261 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:26:36,261 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:26:36,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:26:36,262 INFO L82 PathProgramCache]: Analyzing trace with hash -792297830, now seen corresponding path program 1 times [2018-10-26 19:26:36,262 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:26:36,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:26:36,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:36,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:26:36,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:26:36,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:26:36,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:26:36,526 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 [2018-10-26 19:26:36,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:26:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:26:36,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:26:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-26 19:26:36,722 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:26:36,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2018-10-26 19:26:36,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 19:26:36,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 19:26:36,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 19:26:36,724 INFO L87 Difference]: Start difference. First operand 2044 states and 2793 transitions. Second operand 5 states. [2018-10-26 19:26:41,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:26:41,586 INFO L93 Difference]: Finished difference Result 7386 states and 10244 transitions. [2018-10-26 19:26:41,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:26:41,593 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 95 [2018-10-26 19:26:41,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:26:41,618 INFO L225 Difference]: With dead ends: 7386 [2018-10-26 19:26:41,618 INFO L226 Difference]: Without dead ends: 5344 [2018-10-26 19:26:41,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 19:26:41,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5344 states. [2018-10-26 19:26:41,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5344 to 5344. [2018-10-26 19:26:41,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5344 states. [2018-10-26 19:26:41,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5344 states to 5344 states and 6805 transitions. [2018-10-26 19:26:41,725 INFO L78 Accepts]: Start accepts. Automaton has 5344 states and 6805 transitions. Word has length 95 [2018-10-26 19:26:41,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:26:41,727 INFO L481 AbstractCegarLoop]: Abstraction has 5344 states and 6805 transitions. [2018-10-26 19:26:41,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 19:26:41,728 INFO L276 IsEmpty]: Start isEmpty. Operand 5344 states and 6805 transitions. [2018-10-26 19:26:41,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-10-26 19:26:41,734 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:26:41,735 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:26:41,735 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:26:41,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:26:41,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1740744444, now seen corresponding path program 1 times [2018-10-26 19:26:41,736 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:26:41,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:26:41,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:41,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:26:41,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:26:42,026 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-26 19:26:42,027 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:26:42,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 19:26:42,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 19:26:42,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 19:26:42,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 19:26:42,028 INFO L87 Difference]: Start difference. First operand 5344 states and 6805 transitions. Second operand 3 states. [2018-10-26 19:26:44,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:26:44,123 INFO L93 Difference]: Finished difference Result 12666 states and 16536 transitions. [2018-10-26 19:26:44,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 19:26:44,125 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 244 [2018-10-26 19:26:44,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:26:44,160 INFO L225 Difference]: With dead ends: 12666 [2018-10-26 19:26:44,161 INFO L226 Difference]: Without dead ends: 7324 [2018-10-26 19:26:44,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 19:26:44,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7324 states. [2018-10-26 19:26:44,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7324 to 7324. [2018-10-26 19:26:44,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7324 states. [2018-10-26 19:26:44,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7324 states to 7324 states and 9181 transitions. [2018-10-26 19:26:44,368 INFO L78 Accepts]: Start accepts. Automaton has 7324 states and 9181 transitions. Word has length 244 [2018-10-26 19:26:44,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:26:44,368 INFO L481 AbstractCegarLoop]: Abstraction has 7324 states and 9181 transitions. [2018-10-26 19:26:44,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 19:26:44,369 INFO L276 IsEmpty]: Start isEmpty. Operand 7324 states and 9181 transitions. [2018-10-26 19:26:44,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2018-10-26 19:26:44,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:26:44,378 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:26:44,378 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:26:44,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:26:44,379 INFO L82 PathProgramCache]: Analyzing trace with hash 149389545, now seen corresponding path program 1 times [2018-10-26 19:26:44,379 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:26:44,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:26:44,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:44,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:26:44,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:26:44,869 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-26 19:26:45,067 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2018-10-26 19:26:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-26 19:26:45,639 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:26:45,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-26 19:26:45,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 19:26:45,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 19:26:45,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-26 19:26:45,641 INFO L87 Difference]: Start difference. First operand 7324 states and 9181 transitions. Second operand 7 states. [2018-10-26 19:26:52,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:26:52,504 INFO L93 Difference]: Finished difference Result 14987 states and 18714 transitions. [2018-10-26 19:26:52,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 19:26:52,505 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 394 [2018-10-26 19:26:52,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:26:52,535 INFO L225 Difference]: With dead ends: 14987 [2018-10-26 19:26:52,535 INFO L226 Difference]: Without dead ends: 7665 [2018-10-26 19:26:52,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-26 19:26:52,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7665 states. [2018-10-26 19:26:52,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7665 to 7654. [2018-10-26 19:26:52,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7654 states. [2018-10-26 19:26:52,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7654 states to 7654 states and 9517 transitions. [2018-10-26 19:26:52,659 INFO L78 Accepts]: Start accepts. Automaton has 7654 states and 9517 transitions. Word has length 394 [2018-10-26 19:26:52,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:26:52,660 INFO L481 AbstractCegarLoop]: Abstraction has 7654 states and 9517 transitions. [2018-10-26 19:26:52,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 19:26:52,660 INFO L276 IsEmpty]: Start isEmpty. Operand 7654 states and 9517 transitions. [2018-10-26 19:26:52,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2018-10-26 19:26:52,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:26:52,672 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:26:52,672 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:26:52,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:26:52,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1151752647, now seen corresponding path program 1 times [2018-10-26 19:26:52,673 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:26:52,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:26:52,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:52,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:26:52,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:26:53,297 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-10-26 19:26:53,526 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-10-26 19:26:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-10-26 19:26:53,802 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:26:53,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-26 19:26:53,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 19:26:53,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 19:26:53,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-26 19:26:53,804 INFO L87 Difference]: Start difference. First operand 7654 states and 9517 transitions. Second operand 7 states. [2018-10-26 19:26:58,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:26:58,471 INFO L93 Difference]: Finished difference Result 16382 states and 20215 transitions. [2018-10-26 19:26:58,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 19:26:58,471 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 482 [2018-10-26 19:26:58,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:26:58,497 INFO L225 Difference]: With dead ends: 16382 [2018-10-26 19:26:58,497 INFO L226 Difference]: Without dead ends: 7650 [2018-10-26 19:26:58,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-26 19:26:58,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7650 states. [2018-10-26 19:26:58,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7650 to 7650. [2018-10-26 19:26:58,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7650 states. [2018-10-26 19:26:58,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7650 states to 7650 states and 8513 transitions. [2018-10-26 19:26:58,602 INFO L78 Accepts]: Start accepts. Automaton has 7650 states and 8513 transitions. Word has length 482 [2018-10-26 19:26:58,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:26:58,602 INFO L481 AbstractCegarLoop]: Abstraction has 7650 states and 8513 transitions. [2018-10-26 19:26:58,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 19:26:58,603 INFO L276 IsEmpty]: Start isEmpty. Operand 7650 states and 8513 transitions. [2018-10-26 19:26:58,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2018-10-26 19:26:58,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:26:58,617 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:26:58,617 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:26:58,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:26:58,618 INFO L82 PathProgramCache]: Analyzing trace with hash 248406718, now seen corresponding path program 1 times [2018-10-26 19:26:58,618 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:26:58,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:26:58,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:58,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:26:58,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:26:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 449 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-26 19:26:59,071 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:26:59,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:26:59,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:26:59,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:26:59,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:26:59,073 INFO L87 Difference]: Start difference. First operand 7650 states and 8513 transitions. Second operand 4 states. [2018-10-26 19:27:01,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:27:01,298 INFO L93 Difference]: Finished difference Result 17608 states and 19679 transitions. [2018-10-26 19:27:01,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:27:01,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 544 [2018-10-26 19:27:01,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:27:01,320 INFO L225 Difference]: With dead ends: 17608 [2018-10-26 19:27:01,321 INFO L226 Difference]: Without dead ends: 10290 [2018-10-26 19:27:01,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:27:01,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10290 states. [2018-10-26 19:27:01,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10290 to 10290. [2018-10-26 19:27:01,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10290 states. [2018-10-26 19:27:01,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10290 states to 10290 states and 11148 transitions. [2018-10-26 19:27:01,465 INFO L78 Accepts]: Start accepts. Automaton has 10290 states and 11148 transitions. Word has length 544 [2018-10-26 19:27:01,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:27:01,466 INFO L481 AbstractCegarLoop]: Abstraction has 10290 states and 11148 transitions. [2018-10-26 19:27:01,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:27:01,466 INFO L276 IsEmpty]: Start isEmpty. Operand 10290 states and 11148 transitions. [2018-10-26 19:27:01,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2018-10-26 19:27:01,499 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:27:01,499 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:27:01,500 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:27:01,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:27:01,500 INFO L82 PathProgramCache]: Analyzing trace with hash 662787585, now seen corresponding path program 1 times [2018-10-26 19:27:01,500 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:27:01,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:27:01,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:27:01,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:27:01,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:27:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:27:02,234 WARN L179 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-26 19:27:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 965 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2018-10-26 19:27:02,747 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:27:02,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:27:02,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:27:02,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:27:02,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:27:02,749 INFO L87 Difference]: Start difference. First operand 10290 states and 11148 transitions. Second operand 4 states. [2018-10-26 19:27:05,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:27:05,538 INFO L93 Difference]: Finished difference Result 22888 states and 24885 transitions. [2018-10-26 19:27:05,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:27:05,539 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 723 [2018-10-26 19:27:05,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:27:05,564 INFO L225 Difference]: With dead ends: 22888 [2018-10-26 19:27:05,564 INFO L226 Difference]: Without dead ends: 12930 [2018-10-26 19:27:05,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:27:05,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12930 states. [2018-10-26 19:27:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12930 to 12930. [2018-10-26 19:27:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12930 states. [2018-10-26 19:27:05,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12930 states to 12930 states and 13876 transitions. [2018-10-26 19:27:05,731 INFO L78 Accepts]: Start accepts. Automaton has 12930 states and 13876 transitions. Word has length 723 [2018-10-26 19:27:05,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:27:05,732 INFO L481 AbstractCegarLoop]: Abstraction has 12930 states and 13876 transitions. [2018-10-26 19:27:05,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:27:05,733 INFO L276 IsEmpty]: Start isEmpty. Operand 12930 states and 13876 transitions. [2018-10-26 19:27:05,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 823 [2018-10-26 19:27:05,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:27:05,765 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:27:05,766 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:27:05,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:27:05,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1038880993, now seen corresponding path program 1 times [2018-10-26 19:27:05,766 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:27:05,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:27:05,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:27:05,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:27:05,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:27:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:27:06,416 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-26 19:27:06,898 WARN L179 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2018-10-26 19:27:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 15 proven. 207 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2018-10-26 19:27:07,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:27:07,641 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 [2018-10-26 19:27:07,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:27:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:27:07,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:27:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 929 trivial. 0 not checked. [2018-10-26 19:27:08,184 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:27:08,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2018-10-26 19:27:08,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 19:27:08,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 19:27:08,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-26 19:27:08,186 INFO L87 Difference]: Start difference. First operand 12930 states and 13876 transitions. Second operand 8 states. [2018-10-26 19:27:13,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:27:13,170 INFO L93 Difference]: Finished difference Result 25664 states and 27554 transitions. [2018-10-26 19:27:13,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 19:27:13,171 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 822 [2018-10-26 19:27:13,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:27:13,196 INFO L225 Difference]: With dead ends: 25664 [2018-10-26 19:27:13,196 INFO L226 Difference]: Without dead ends: 13066 [2018-10-26 19:27:13,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 823 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-10-26 19:27:13,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13066 states. [2018-10-26 19:27:13,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13066 to 12930. [2018-10-26 19:27:13,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12930 states. [2018-10-26 19:27:13,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12930 states to 12930 states and 13645 transitions. [2018-10-26 19:27:13,389 INFO L78 Accepts]: Start accepts. Automaton has 12930 states and 13645 transitions. Word has length 822 [2018-10-26 19:27:13,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:27:13,391 INFO L481 AbstractCegarLoop]: Abstraction has 12930 states and 13645 transitions. [2018-10-26 19:27:13,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 19:27:13,391 INFO L276 IsEmpty]: Start isEmpty. Operand 12930 states and 13645 transitions. [2018-10-26 19:27:13,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2018-10-26 19:27:13,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:27:13,411 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:27:13,412 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:27:13,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:27:13,412 INFO L82 PathProgramCache]: Analyzing trace with hash -372368227, now seen corresponding path program 1 times [2018-10-26 19:27:13,413 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:27:13,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:27:13,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:27:13,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:27:13,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:27:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:27:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 732 trivial. 0 not checked. [2018-10-26 19:27:14,326 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:27:14,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:27:14,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:27:14,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:27:14,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:27:14,328 INFO L87 Difference]: Start difference. First operand 12930 states and 13645 transitions. Second operand 4 states. [2018-10-26 19:27:16,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:27:16,824 INFO L93 Difference]: Finished difference Result 35428 states and 37577 transitions. [2018-10-26 19:27:16,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:27:16,825 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 839 [2018-10-26 19:27:16,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:27:16,862 INFO L225 Difference]: With dead ends: 35428 [2018-10-26 19:27:16,862 INFO L226 Difference]: Without dead ends: 20838 [2018-10-26 19:27:16,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:27:16,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20838 states. [2018-10-26 19:27:17,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20838 to 19518. [2018-10-26 19:27:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19518 states. [2018-10-26 19:27:17,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19518 states to 19518 states and 20338 transitions. [2018-10-26 19:27:17,104 INFO L78 Accepts]: Start accepts. Automaton has 19518 states and 20338 transitions. Word has length 839 [2018-10-26 19:27:17,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:27:17,105 INFO L481 AbstractCegarLoop]: Abstraction has 19518 states and 20338 transitions. [2018-10-26 19:27:17,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:27:17,106 INFO L276 IsEmpty]: Start isEmpty. Operand 19518 states and 20338 transitions. [2018-10-26 19:27:17,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1326 [2018-10-26 19:27:17,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:27:17,138 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:27:17,138 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:27:17,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:27:17,139 INFO L82 PathProgramCache]: Analyzing trace with hash -329048818, now seen corresponding path program 1 times [2018-10-26 19:27:17,139 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:27:17,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:27:17,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:27:17,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:27:17,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:27:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:27:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3351 backedges. 2279 proven. 0 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2018-10-26 19:27:18,411 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:27:18,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:27:18,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:27:18,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:27:18,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:27:18,413 INFO L87 Difference]: Start difference. First operand 19518 states and 20338 transitions. Second operand 4 states. [2018-10-26 19:27:20,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:27:20,808 INFO L93 Difference]: Finished difference Result 37706 states and 39280 transitions. [2018-10-26 19:27:20,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:27:20,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1325 [2018-10-26 19:27:20,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:27:20,830 INFO L225 Difference]: With dead ends: 37706 [2018-10-26 19:27:20,831 INFO L226 Difference]: Without dead ends: 18520 [2018-10-26 19:27:20,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:27:20,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18520 states. [2018-10-26 19:27:21,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18520 to 18190. [2018-10-26 19:27:21,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18190 states. [2018-10-26 19:27:21,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18190 states to 18190 states and 18728 transitions. [2018-10-26 19:27:21,032 INFO L78 Accepts]: Start accepts. Automaton has 18190 states and 18728 transitions. Word has length 1325 [2018-10-26 19:27:21,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:27:21,033 INFO L481 AbstractCegarLoop]: Abstraction has 18190 states and 18728 transitions. [2018-10-26 19:27:21,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:27:21,034 INFO L276 IsEmpty]: Start isEmpty. Operand 18190 states and 18728 transitions. [2018-10-26 19:27:21,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1327 [2018-10-26 19:27:21,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:27:21,063 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:27:21,064 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:27:21,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:27:21,064 INFO L82 PathProgramCache]: Analyzing trace with hash -528522988, now seen corresponding path program 1 times [2018-10-26 19:27:21,064 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:27:21,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:27:21,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:27:21,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:27:21,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:27:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:27:21,948 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 19:27:22,288 WARN L179 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-26 19:27:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3358 backedges. 1657 proven. 243 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2018-10-26 19:27:25,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:27:25,187 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-26 19:27:25,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:27:25,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:27:25,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:27:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3358 backedges. 1657 proven. 0 refuted. 0 times theorem prover too weak. 1701 trivial. 0 not checked. [2018-10-26 19:27:27,275 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:27:27,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2018-10-26 19:27:27,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 19:27:27,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 19:27:27,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-26 19:27:27,278 INFO L87 Difference]: Start difference. First operand 18190 states and 18728 transitions. Second operand 10 states. [2018-10-26 19:27:36,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:27:36,502 INFO L93 Difference]: Finished difference Result 39354 states and 40522 transitions. [2018-10-26 19:27:36,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-26 19:27:36,503 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1326 [2018-10-26 19:27:36,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:27:36,523 INFO L225 Difference]: With dead ends: 39354 [2018-10-26 19:27:36,524 INFO L226 Difference]: Without dead ends: 21496 [2018-10-26 19:27:36,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1342 GetRequests, 1325 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2018-10-26 19:27:36,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21496 states. [2018-10-26 19:27:36,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21496 to 20171. [2018-10-26 19:27:36,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20171 states. [2018-10-26 19:27:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20171 states to 20171 states and 20732 transitions. [2018-10-26 19:27:36,846 INFO L78 Accepts]: Start accepts. Automaton has 20171 states and 20732 transitions. Word has length 1326 [2018-10-26 19:27:36,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:27:36,846 INFO L481 AbstractCegarLoop]: Abstraction has 20171 states and 20732 transitions. [2018-10-26 19:27:36,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 19:27:36,847 INFO L276 IsEmpty]: Start isEmpty. Operand 20171 states and 20732 transitions. [2018-10-26 19:27:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1358 [2018-10-26 19:27:36,872 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:27:36,873 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:27:36,873 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:27:36,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:27:36,874 INFO L82 PathProgramCache]: Analyzing trace with hash 848714193, now seen corresponding path program 1 times [2018-10-26 19:27:36,874 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:27:36,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:27:36,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:27:36,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:27:36,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:27:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:27:37,684 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2018-10-26 19:27:37,982 WARN L179 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-10-26 19:27:38,290 WARN L179 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-10-26 19:27:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4003 backedges. 1760 proven. 158 refuted. 0 times theorem prover too weak. 2085 trivial. 0 not checked. [2018-10-26 19:27:40,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:27:40,219 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 [2018-10-26 19:27:40,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:27:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:27:40,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:27:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4003 backedges. 1918 proven. 0 refuted. 0 times theorem prover too weak. 2085 trivial. 0 not checked. [2018-10-26 19:27:42,543 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:27:42,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2018-10-26 19:27:42,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 19:27:42,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 19:27:42,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-26 19:27:42,545 INFO L87 Difference]: Start difference. First operand 20171 states and 20732 transitions. Second operand 10 states. [2018-10-26 19:27:51,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:27:51,767 INFO L93 Difference]: Finished difference Result 57673 states and 59323 transitions. [2018-10-26 19:27:51,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-26 19:27:51,768 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1357 [2018-10-26 19:27:51,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:27:51,799 INFO L225 Difference]: With dead ends: 57673 [2018-10-26 19:27:51,799 INFO L226 Difference]: Without dead ends: 36841 [2018-10-26 19:27:51,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1387 GetRequests, 1367 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2018-10-26 19:27:51,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36841 states. [2018-10-26 19:27:52,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36841 to 28230. [2018-10-26 19:27:52,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28230 states. [2018-10-26 19:27:52,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28230 states to 28230 states and 28927 transitions. [2018-10-26 19:27:52,207 INFO L78 Accepts]: Start accepts. Automaton has 28230 states and 28927 transitions. Word has length 1357 [2018-10-26 19:27:52,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:27:52,208 INFO L481 AbstractCegarLoop]: Abstraction has 28230 states and 28927 transitions. [2018-10-26 19:27:52,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 19:27:52,208 INFO L276 IsEmpty]: Start isEmpty. Operand 28230 states and 28927 transitions. [2018-10-26 19:27:52,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1610 [2018-10-26 19:27:52,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:27:52,252 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:27:52,252 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:27:52,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:27:52,253 INFO L82 PathProgramCache]: Analyzing trace with hash -115817809, now seen corresponding path program 1 times [2018-10-26 19:27:52,253 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:27:52,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:27:52,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:27:52,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:27:52,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:27:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:27:55,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4578 backedges. 3204 proven. 0 refuted. 0 times theorem prover too weak. 1374 trivial. 0 not checked. [2018-10-26 19:27:55,646 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:27:55,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 19:27:55,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 19:27:55,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 19:27:55,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-26 19:27:55,647 INFO L87 Difference]: Start difference. First operand 28230 states and 28927 transitions. Second operand 5 states. [2018-10-26 19:27:58,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:27:58,141 INFO L93 Difference]: Finished difference Result 56462 states and 57858 transitions. [2018-10-26 19:27:58,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 19:27:58,141 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1609 [2018-10-26 19:27:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:27:58,167 INFO L225 Difference]: With dead ends: 56462 [2018-10-26 19:27:58,167 INFO L226 Difference]: Without dead ends: 28564 [2018-10-26 19:27:58,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-26 19:27:58,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28564 states. [2018-10-26 19:27:58,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28564 to 28230. [2018-10-26 19:27:58,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28230 states. [2018-10-26 19:27:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28230 states to 28230 states and 28925 transitions. [2018-10-26 19:27:58,410 INFO L78 Accepts]: Start accepts. Automaton has 28230 states and 28925 transitions. Word has length 1609 [2018-10-26 19:27:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:27:58,411 INFO L481 AbstractCegarLoop]: Abstraction has 28230 states and 28925 transitions. [2018-10-26 19:27:58,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 19:27:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 28230 states and 28925 transitions. [2018-10-26 19:27:58,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1868 [2018-10-26 19:27:58,564 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:27:58,565 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:27:58,566 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:27:58,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:27:58,567 INFO L82 PathProgramCache]: Analyzing trace with hash 772003938, now seen corresponding path program 1 times [2018-10-26 19:27:58,567 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:27:58,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:27:58,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:27:58,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:27:58,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:27:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:27:59,950 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 19:28:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6259 backedges. 3092 proven. 251 refuted. 0 times theorem prover too weak. 2916 trivial. 0 not checked. [2018-10-26 19:28:04,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:28:04,457 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 [2018-10-26 19:28:04,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:28:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:28:04,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:28:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6259 backedges. 3415 proven. 0 refuted. 0 times theorem prover too weak. 2844 trivial. 0 not checked. [2018-10-26 19:28:07,615 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:28:07,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2018-10-26 19:28:07,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 19:28:07,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 19:28:07,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-26 19:28:07,619 INFO L87 Difference]: Start difference. First operand 28230 states and 28925 transitions. Second operand 10 states. [2018-10-26 19:28:18,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:28:18,960 INFO L93 Difference]: Finished difference Result 58947 states and 60444 transitions. [2018-10-26 19:28:18,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-26 19:28:18,960 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1867 [2018-10-26 19:28:18,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:28:18,985 INFO L225 Difference]: With dead ends: 58947 [2018-10-26 19:28:18,985 INFO L226 Difference]: Without dead ends: 24332 [2018-10-26 19:28:19,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1892 GetRequests, 1872 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2018-10-26 19:28:19,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24332 states. [2018-10-26 19:28:19,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24332 to 24043. [2018-10-26 19:28:19,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24043 states. [2018-10-26 19:28:19,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24043 states to 24043 states and 24555 transitions. [2018-10-26 19:28:19,238 INFO L78 Accepts]: Start accepts. Automaton has 24043 states and 24555 transitions. Word has length 1867 [2018-10-26 19:28:19,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:28:19,239 INFO L481 AbstractCegarLoop]: Abstraction has 24043 states and 24555 transitions. [2018-10-26 19:28:19,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 19:28:19,239 INFO L276 IsEmpty]: Start isEmpty. Operand 24043 states and 24555 transitions. [2018-10-26 19:28:19,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2185 [2018-10-26 19:28:19,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:28:19,280 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:28:19,280 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:28:19,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:28:19,280 INFO L82 PathProgramCache]: Analyzing trace with hash -91108954, now seen corresponding path program 1 times [2018-10-26 19:28:19,281 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:28:19,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:28:19,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:28:19,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:28:19,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:28:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:28:20,519 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 19:28:20,901 WARN L179 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-10-26 19:28:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9169 backedges. 4890 proven. 2069 refuted. 0 times theorem prover too weak. 2210 trivial. 0 not checked. [2018-10-26 19:28:24,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:28:24,942 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 [2018-10-26 19:28:24,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:28:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:28:25,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:28:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9169 backedges. 5025 proven. 0 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2018-10-26 19:28:27,804 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:28:27,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2018-10-26 19:28:27,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 19:28:27,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 19:28:27,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-10-26 19:28:27,808 INFO L87 Difference]: Start difference. First operand 24043 states and 24555 transitions. Second operand 11 states. [2018-10-26 19:28:36,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:28:36,127 INFO L93 Difference]: Finished difference Result 48084 states and 49117 transitions. [2018-10-26 19:28:36,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 19:28:36,127 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 2184 [2018-10-26 19:28:36,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:28:36,155 INFO L225 Difference]: With dead ends: 48084 [2018-10-26 19:28:36,155 INFO L226 Difference]: Without dead ends: 25033 [2018-10-26 19:28:36,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2198 GetRequests, 2186 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-10-26 19:28:36,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25033 states. [2018-10-26 19:28:36,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25033 to 24373. [2018-10-26 19:28:36,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24373 states. [2018-10-26 19:28:36,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24373 states to 24373 states and 24846 transitions. [2018-10-26 19:28:36,406 INFO L78 Accepts]: Start accepts. Automaton has 24373 states and 24846 transitions. Word has length 2184 [2018-10-26 19:28:36,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:28:36,407 INFO L481 AbstractCegarLoop]: Abstraction has 24373 states and 24846 transitions. [2018-10-26 19:28:36,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 19:28:36,407 INFO L276 IsEmpty]: Start isEmpty. Operand 24373 states and 24846 transitions. [2018-10-26 19:28:36,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2398 [2018-10-26 19:28:36,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:28:36,454 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:28:36,455 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:28:36,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:28:36,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1026329788, now seen corresponding path program 1 times [2018-10-26 19:28:36,455 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:28:36,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:28:36,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:28:36,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:28:36,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:28:36,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:28:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10517 backedges. 5242 proven. 572 refuted. 0 times theorem prover too weak. 4703 trivial. 0 not checked. [2018-10-26 19:28:41,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:28:41,953 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-26 19:28:41,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:28:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:28:42,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:28:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 10517 backedges. 5347 proven. 467 refuted. 0 times theorem prover too weak. 4703 trivial. 0 not checked. [2018-10-26 19:28:46,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 19:28:46,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2018-10-26 19:28:46,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 19:28:46,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 19:28:46,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-26 19:28:46,589 INFO L87 Difference]: Start difference. First operand 24373 states and 24846 transitions. Second operand 9 states. [2018-10-26 19:28:52,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:28:52,201 INFO L93 Difference]: Finished difference Result 50221 states and 51217 transitions. [2018-10-26 19:28:52,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-26 19:28:52,201 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 2397 [2018-10-26 19:28:52,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:28:52,225 INFO L225 Difference]: With dead ends: 50221 [2018-10-26 19:28:52,226 INFO L226 Difference]: Without dead ends: 26178 [2018-10-26 19:28:52,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2410 GetRequests, 2397 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-10-26 19:28:52,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26178 states. [2018-10-26 19:28:52,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26178 to 25329. [2018-10-26 19:28:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25329 states. [2018-10-26 19:28:52,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25329 states to 25329 states and 25771 transitions. [2018-10-26 19:28:52,499 INFO L78 Accepts]: Start accepts. Automaton has 25329 states and 25771 transitions. Word has length 2397 [2018-10-26 19:28:52,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:28:52,500 INFO L481 AbstractCegarLoop]: Abstraction has 25329 states and 25771 transitions. [2018-10-26 19:28:52,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 19:28:52,500 INFO L276 IsEmpty]: Start isEmpty. Operand 25329 states and 25771 transitions. [2018-10-26 19:28:52,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2420 [2018-10-26 19:28:52,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:28:52,554 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:28:52,555 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:28:52,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:28:52,556 INFO L82 PathProgramCache]: Analyzing trace with hash -2131627853, now seen corresponding path program 1 times [2018-10-26 19:28:52,556 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:28:52,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:28:52,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:28:52,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:28:52,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:28:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:28:54,236 WARN L179 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2018-10-26 19:29:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10677 backedges. 7446 proven. 985 refuted. 0 times theorem prover too weak. 2246 trivial. 0 not checked. [2018-10-26 19:29:00,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:29:00,970 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 [2018-10-26 19:29:00,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:29:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:29:01,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:29:08,418 WARN L179 SmtUtils]: Spent 6.40 s on a formula simplification. DAG size of input: 427 DAG size of output: 22 [2018-10-26 19:29:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10677 backedges. 6671 proven. 0 refuted. 0 times theorem prover too weak. 4006 trivial. 0 not checked. [2018-10-26 19:29:14,233 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:29:14,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2018-10-26 19:29:14,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 19:29:14,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 19:29:14,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-10-26 19:29:14,238 INFO L87 Difference]: Start difference. First operand 25329 states and 25771 transitions. Second operand 10 states. [2018-10-26 19:29:19,835 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2018-10-26 19:29:30,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:29:30,606 INFO L93 Difference]: Finished difference Result 52737 states and 53653 transitions. [2018-10-26 19:29:30,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-26 19:29:30,606 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 2419 [2018-10-26 19:29:30,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:29:30,639 INFO L225 Difference]: With dead ends: 52737 [2018-10-26 19:29:30,639 INFO L226 Difference]: Without dead ends: 28400 [2018-10-26 19:29:30,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2450 GetRequests, 2427 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2018-10-26 19:29:30,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28400 states. [2018-10-26 19:29:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28400 to 22900. [2018-10-26 19:29:30,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22900 states. [2018-10-26 19:29:30,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22900 states to 22900 states and 23262 transitions. [2018-10-26 19:29:30,920 INFO L78 Accepts]: Start accepts. Automaton has 22900 states and 23262 transitions. Word has length 2419 [2018-10-26 19:29:30,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:29:30,922 INFO L481 AbstractCegarLoop]: Abstraction has 22900 states and 23262 transitions. [2018-10-26 19:29:30,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 19:29:30,922 INFO L276 IsEmpty]: Start isEmpty. Operand 22900 states and 23262 transitions. [2018-10-26 19:29:30,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2508 [2018-10-26 19:29:30,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:29:30,973 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:29:30,973 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:29:30,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:29:30,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1005413556, now seen corresponding path program 1 times [2018-10-26 19:29:30,974 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:29:30,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:29:30,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:29:30,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:29:30,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:29:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:29:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10769 backedges. 813 proven. 5 refuted. 0 times theorem prover too weak. 9951 trivial. 0 not checked. [2018-10-26 19:29:34,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:29:34,349 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 [2018-10-26 19:29:34,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:29:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:29:34,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:29:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10769 backedges. 813 proven. 0 refuted. 0 times theorem prover too weak. 9956 trivial. 0 not checked. [2018-10-26 19:29:37,345 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:29:37,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-26 19:29:37,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 19:29:37,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 19:29:37,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 19:29:37,348 INFO L87 Difference]: Start difference. First operand 22900 states and 23262 transitions. Second operand 5 states. [2018-10-26 19:29:39,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:29:39,833 INFO L93 Difference]: Finished difference Result 44477 states and 45194 transitions. [2018-10-26 19:29:39,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 19:29:39,834 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 2507 [2018-10-26 19:29:39,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:29:39,850 INFO L225 Difference]: With dead ends: 44477 [2018-10-26 19:29:39,850 INFO L226 Difference]: Without dead ends: 18599 [2018-10-26 19:29:39,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2511 GetRequests, 2508 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 19:29:39,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18599 states. [2018-10-26 19:29:40,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18599 to 18599. [2018-10-26 19:29:40,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18599 states. [2018-10-26 19:29:40,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18599 states to 18599 states and 18855 transitions. [2018-10-26 19:29:40,035 INFO L78 Accepts]: Start accepts. Automaton has 18599 states and 18855 transitions. Word has length 2507 [2018-10-26 19:29:40,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:29:40,036 INFO L481 AbstractCegarLoop]: Abstraction has 18599 states and 18855 transitions. [2018-10-26 19:29:40,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 19:29:40,036 INFO L276 IsEmpty]: Start isEmpty. Operand 18599 states and 18855 transitions. [2018-10-26 19:29:40,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2641 [2018-10-26 19:29:40,080 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:29:40,081 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:29:40,082 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:29:40,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:29:40,082 INFO L82 PathProgramCache]: Analyzing trace with hash -49025679, now seen corresponding path program 1 times [2018-10-26 19:29:40,083 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:29:40,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:29:40,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:29:40,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:29:40,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:29:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:29:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12861 backedges. 9371 proven. 1277 refuted. 0 times theorem prover too weak. 2213 trivial. 0 not checked. [2018-10-26 19:29:50,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:29:50,906 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 [2018-10-26 19:29:50,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:29:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:29:51,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:29:52,261 WARN L179 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2018-10-26 19:29:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12861 backedges. 9585 proven. 816 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2018-10-26 19:29:59,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 19:29:59,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2018-10-26 19:29:59,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 19:29:59,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 19:29:59,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2018-10-26 19:29:59,126 INFO L87 Difference]: Start difference. First operand 18599 states and 18855 transitions. Second operand 13 states. Received shutdown request... [2018-10-26 19:30:03,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-26 19:30:03,730 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 19:30:03,735 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 19:30:03,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 07:30:03 BoogieIcfgContainer [2018-10-26 19:30:03,736 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 19:30:03,736 INFO L168 Benchmark]: Toolchain (without parser) took 231209.45 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -83.9 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-10-26 19:30:03,737 INFO L168 Benchmark]: CDTParser took 0.26 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. [2018-10-26 19:30:03,738 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1444.20 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-10-26 19:30:03,739 INFO L168 Benchmark]: Boogie Procedure Inliner took 360.43 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 755.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -855.3 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. [2018-10-26 19:30:03,739 INFO L168 Benchmark]: Boogie Preprocessor took 148.03 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2018-10-26 19:30:03,740 INFO L168 Benchmark]: RCFGBuilder took 5937.06 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 267.5 MB). Peak memory consumption was 267.5 MB. Max. memory is 7.1 GB. [2018-10-26 19:30:03,741 INFO L168 Benchmark]: TraceAbstraction took 223313.49 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.9 GB in the beginning and 1.5 GB in the end (delta: 416.4 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-10-26 19:30:03,746 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 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 1444.20 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 360.43 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 755.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -855.3 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 148.03 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5937.06 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 267.5 MB). Peak memory consumption was 267.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 223313.49 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.9 GB in the beginning and 1.5 GB in the end (delta: 416.4 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 25). Cancelled while BasicCegarLoop was constructing difference of abstraction (18599states) and FLOYD_HOARE automaton (currently 10 states, 13 states before enhancement),while ReachableStatesComputation was computing reachable states (9468 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 397 locations, 1 error locations. TIMEOUT Result, 223.2s OverallTime, 21 OverallIterations, 14 TraceHistogramMax, 118.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3860 SDtfs, 28927 SDslu, 2871 SDs, 0 SdLazy, 84897 SolverSat, 6574 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 96.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17834 GetRequests, 17656 SyntacticMatches, 31 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 17.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28230occurred in iteration=14, 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: 3.6s AutomataMinimizationTime, 20 MinimizatonAttempts, 20040 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 5.2s SatisfiabilityAnalysisTime, 53.3s InterpolantComputationTime, 41557 NumberOfCodeBlocks, 41557 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 41526 ConstructedInterpolants, 463 QuantifiedInterpolants, 280438413 SizeOfPredicates, 11 NumberOfNonLiveVariables, 20263 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 31 InterpolantComputations, 19 PerfectInterpolantSequences, 141413/148467 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown