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/Problem18_label06_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 14:35:54,685 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 14:35:54,687 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 14:35:54,702 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 14:35:54,702 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 14:35:54,704 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 14:35:54,705 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 14:35:54,710 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 14:35:54,711 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 14:35:54,713 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 14:35:54,714 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 14:35:54,714 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 14:35:54,717 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 14:35:54,718 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 14:35:54,719 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 14:35:54,720 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 14:35:54,721 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 14:35:54,723 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 14:35:54,725 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 14:35:54,726 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 14:35:54,728 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 14:35:54,730 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 14:35:54,735 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 14:35:54,749 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 [2018-10-24 14:35:54,776 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 14:35:54,776 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 14:35:54,777 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 14:35:54,777 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 14:35:54,778 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 14:35:54,778 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 14:35:54,778 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 14:35:54,779 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 14:35:54,779 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 14:35:54,779 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 14:35:54,779 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 14:35:54,780 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 14:35:54,781 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 14:35:54,781 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 14:35:54,781 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 14:35:54,781 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 14:35:54,781 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 14:35:54,782 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 14:35:54,782 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 14:35:54,782 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 14:35:54,782 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 14:35:54,783 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 14:35:54,784 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 14:35:54,784 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 14:35:54,784 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 14:35:54,784 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 14:35:54,785 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 14:35:54,785 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 14:35:54,850 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 14:35:54,867 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 14:35:54,872 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 14:35:54,874 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 14:35:54,874 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 14:35:54,875 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label06_false-unreach-call.c [2018-10-24 14:35:54,940 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f5709ce4a/8c026e9e88324e12b625ecc0c9887e5e/FLAG04cb18e74 [2018-10-24 14:35:55,697 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 14:35:55,698 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label06_false-unreach-call.c [2018-10-24 14:35:55,725 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f5709ce4a/8c026e9e88324e12b625ecc0c9887e5e/FLAG04cb18e74 [2018-10-24 14:35:55,746 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f5709ce4a/8c026e9e88324e12b625ecc0c9887e5e [2018-10-24 14:35:55,759 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 14:35:55,762 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 14:35:55,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 14:35:55,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 14:35:55,771 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 14:35:55,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:35:55" (1/1) ... [2018-10-24 14:35:55,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@441f49ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:35:55, skipping insertion in model container [2018-10-24 14:35:55,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:35:55" (1/1) ... [2018-10-24 14:35:55,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 14:35:55,917 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 14:35:56,897 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:35:56,901 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 14:35:57,364 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:35:57,396 INFO L193 MainTranslator]: Completed translation [2018-10-24 14:35:57,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:35:57 WrapperNode [2018-10-24 14:35:57,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 14:35:57,399 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 14:35:57,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 14:35:57,400 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 14:35:57,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:35:57" (1/1) ... [2018-10-24 14:35:57,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:35:57" (1/1) ... [2018-10-24 14:35:57,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 14:35:57,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 14:35:57,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 14:35:57,898 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 14:35:57,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:35:57" (1/1) ... [2018-10-24 14:35:57,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:35:57" (1/1) ... [2018-10-24 14:35:57,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:35:57" (1/1) ... [2018-10-24 14:35:57,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:35:57" (1/1) ... [2018-10-24 14:35:58,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:35:57" (1/1) ... [2018-10-24 14:35:58,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:35:57" (1/1) ... [2018-10-24 14:35:58,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:35:57" (1/1) ... [2018-10-24 14:35:58,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 14:35:58,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 14:35:58,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 14:35:58,139 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 14:35:58,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:35:57" (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 [2018-10-24 14:35:58,212 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 14:35:58,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 14:35:58,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 14:36:06,556 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 14:36:06,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:36:06 BoogieIcfgContainer [2018-10-24 14:36:06,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 14:36:06,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 14:36:06,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 14:36:06,562 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 14:36:06,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:35:55" (1/3) ... [2018-10-24 14:36:06,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f70a17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:36:06, skipping insertion in model container [2018-10-24 14:36:06,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:35:57" (2/3) ... [2018-10-24 14:36:06,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f70a17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:36:06, skipping insertion in model container [2018-10-24 14:36:06,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:36:06" (3/3) ... [2018-10-24 14:36:06,566 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label06_false-unreach-call.c [2018-10-24 14:36:06,577 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 14:36:06,586 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 14:36:06,604 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 14:36:06,649 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 14:36:06,650 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 14:36:06,650 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 14:36:06,650 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 14:36:06,650 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 14:36:06,650 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 14:36:06,651 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 14:36:06,651 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 14:36:06,651 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 14:36:06,687 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states. [2018-10-24 14:36:06,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-24 14:36:06,695 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:36:06,696 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:36:06,700 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:36:06,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:36:06,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1580163962, now seen corresponding path program 1 times [2018-10-24 14:36:06,709 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:36:06,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:36:06,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:36:06,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:36:06,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:36:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:36:07,070 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-24 14:36:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:36:07,145 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:36:07,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:36:07,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:36:07,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:36:07,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:36:07,169 INFO L87 Difference]: Start difference. First operand 758 states. Second operand 4 states. [2018-10-24 14:36:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:36:17,263 INFO L93 Difference]: Finished difference Result 2902 states and 5650 transitions. [2018-10-24 14:36:17,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:36:17,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2018-10-24 14:36:17,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:36:17,305 INFO L225 Difference]: With dead ends: 2902 [2018-10-24 14:36:17,305 INFO L226 Difference]: Without dead ends: 2137 [2018-10-24 14:36:17,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:36:17,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2018-10-24 14:36:17,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 2137. [2018-10-24 14:36:17,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2137 states. [2018-10-24 14:36:17,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 3734 transitions. [2018-10-24 14:36:17,558 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 3734 transitions. Word has length 26 [2018-10-24 14:36:17,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:36:17,558 INFO L481 AbstractCegarLoop]: Abstraction has 2137 states and 3734 transitions. [2018-10-24 14:36:17,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:36:17,559 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 3734 transitions. [2018-10-24 14:36:17,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-24 14:36:17,565 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:36:17,566 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:36:17,566 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:36:17,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:36:17,567 INFO L82 PathProgramCache]: Analyzing trace with hash -7220096, now seen corresponding path program 1 times [2018-10-24 14:36:17,567 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:36:17,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:36:17,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:36:17,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:36:17,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:36:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:36:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:36:18,082 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:36:18,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:36:18,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:36:18,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:36:18,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:36:18,085 INFO L87 Difference]: Start difference. First operand 2137 states and 3734 transitions. Second operand 4 states. [2018-10-24 14:36:18,247 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-24 14:36:31,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:36:31,324 INFO L93 Difference]: Finished difference Result 7730 states and 13074 transitions. [2018-10-24 14:36:31,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:36:31,324 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2018-10-24 14:36:31,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:36:31,354 INFO L225 Difference]: With dead ends: 7730 [2018-10-24 14:36:31,354 INFO L226 Difference]: Without dead ends: 5595 [2018-10-24 14:36:31,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:36:31,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5595 states. [2018-10-24 14:36:31,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5595 to 5595. [2018-10-24 14:36:31,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5595 states. [2018-10-24 14:36:31,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5595 states to 5595 states and 8527 transitions. [2018-10-24 14:36:31,473 INFO L78 Accepts]: Start accepts. Automaton has 5595 states and 8527 transitions. Word has length 96 [2018-10-24 14:36:31,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:36:31,474 INFO L481 AbstractCegarLoop]: Abstraction has 5595 states and 8527 transitions. [2018-10-24 14:36:31,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:36:31,474 INFO L276 IsEmpty]: Start isEmpty. Operand 5595 states and 8527 transitions. [2018-10-24 14:36:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-24 14:36:31,479 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:36:31,479 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:36:31,480 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:36:31,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:36:31,480 INFO L82 PathProgramCache]: Analyzing trace with hash 10279458, now seen corresponding path program 1 times [2018-10-24 14:36:31,480 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:36:31,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:36:31,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:36:31,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:36:31,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:36:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:36:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:36:32,093 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:36:32,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:36:32,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:36:32,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:36:32,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:36:32,095 INFO L87 Difference]: Start difference. First operand 5595 states and 8527 transitions. Second operand 5 states. [2018-10-24 14:36:40,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:36:40,461 INFO L93 Difference]: Finished difference Result 16025 states and 24804 transitions. [2018-10-24 14:36:40,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:36:40,466 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2018-10-24 14:36:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:36:40,511 INFO L225 Difference]: With dead ends: 16025 [2018-10-24 14:36:40,511 INFO L226 Difference]: Without dead ends: 10432 [2018-10-24 14:36:40,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 14:36:40,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10432 states. [2018-10-24 14:36:40,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10432 to 9741. [2018-10-24 14:36:40,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9741 states. [2018-10-24 14:36:40,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9741 states to 9741 states and 13118 transitions. [2018-10-24 14:36:40,701 INFO L78 Accepts]: Start accepts. Automaton has 9741 states and 13118 transitions. Word has length 145 [2018-10-24 14:36:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:36:40,702 INFO L481 AbstractCegarLoop]: Abstraction has 9741 states and 13118 transitions. [2018-10-24 14:36:40,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:36:40,702 INFO L276 IsEmpty]: Start isEmpty. Operand 9741 states and 13118 transitions. [2018-10-24 14:36:40,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-10-24 14:36:40,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:36:40,709 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:36:40,709 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:36:40,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:36:40,709 INFO L82 PathProgramCache]: Analyzing trace with hash 315138893, now seen corresponding path program 1 times [2018-10-24 14:36:40,710 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:36:40,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:36:40,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:36:40,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:36:40,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:36:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:36:41,175 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-24 14:36:41,563 WARN L179 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2018-10-24 14:36:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 115 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:36:41,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:36:41,699 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 [2018-10-24 14:36:41,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:36:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:36:41,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:36:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:36:41,965 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:36:41,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-24 14:36:41,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 14:36:41,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 14:36:41,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 14:36:41,968 INFO L87 Difference]: Start difference. First operand 9741 states and 13118 transitions. Second operand 6 states. [2018-10-24 14:36:55,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:36:55,225 INFO L93 Difference]: Finished difference Result 34002 states and 48836 transitions. [2018-10-24 14:36:55,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 14:36:55,226 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 282 [2018-10-24 14:36:55,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:36:55,292 INFO L225 Difference]: With dead ends: 34002 [2018-10-24 14:36:55,292 INFO L226 Difference]: Without dead ends: 23570 [2018-10-24 14:36:55,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 282 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:36:55,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23570 states. [2018-10-24 14:36:55,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23570 to 17339. [2018-10-24 14:36:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17339 states. [2018-10-24 14:36:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17339 states to 17339 states and 19653 transitions. [2018-10-24 14:36:55,665 INFO L78 Accepts]: Start accepts. Automaton has 17339 states and 19653 transitions. Word has length 282 [2018-10-24 14:36:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:36:55,666 INFO L481 AbstractCegarLoop]: Abstraction has 17339 states and 19653 transitions. [2018-10-24 14:36:55,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 14:36:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 17339 states and 19653 transitions. [2018-10-24 14:36:55,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2018-10-24 14:36:55,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:36:55,701 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:36:55,702 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:36:55,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:36:55,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1265390655, now seen corresponding path program 1 times [2018-10-24 14:36:55,702 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:36:55,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:36:55,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:36:55,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:36:55,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:36:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:36:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2018-10-24 14:36:56,809 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:36:56,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:36:56,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:36:56,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:36:56,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:36:56,811 INFO L87 Difference]: Start difference. First operand 17339 states and 19653 transitions. Second operand 4 states. [2018-10-24 14:37:03,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:37:03,566 INFO L93 Difference]: Finished difference Result 43673 states and 51516 transitions. [2018-10-24 14:37:03,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:37:03,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 915 [2018-10-24 14:37:03,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:37:03,621 INFO L225 Difference]: With dead ends: 43673 [2018-10-24 14:37:03,621 INFO L226 Difference]: Without dead ends: 27027 [2018-10-24 14:37:03,642 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 [2018-10-24 14:37:03,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27027 states. [2018-10-24 14:37:03,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27027 to 26336. [2018-10-24 14:37:03,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26336 states. [2018-10-24 14:37:04,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26336 states to 26336 states and 30312 transitions. [2018-10-24 14:37:04,021 INFO L78 Accepts]: Start accepts. Automaton has 26336 states and 30312 transitions. Word has length 915 [2018-10-24 14:37:04,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:37:04,023 INFO L481 AbstractCegarLoop]: Abstraction has 26336 states and 30312 transitions. [2018-10-24 14:37:04,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:37:04,023 INFO L276 IsEmpty]: Start isEmpty. Operand 26336 states and 30312 transitions. [2018-10-24 14:37:04,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1047 [2018-10-24 14:37:04,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:37:04,076 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:37:04,077 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:37:04,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:37:04,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1742992509, now seen corresponding path program 1 times [2018-10-24 14:37:04,078 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:37:04,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:37:04,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:37:04,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:37:04,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:37:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:37:05,021 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 14:37:05,444 WARN L179 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2018-10-24 14:37:05,757 WARN L179 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2018-10-24 14:37:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 299 proven. 500 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-10-24 14:37:07,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:37:07,403 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 [2018-10-24 14:37:07,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:37:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:37:07,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:37:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2018-10-24 14:37:08,644 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:37:08,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 10 [2018-10-24 14:37:08,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 14:37:08,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 14:37:08,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-24 14:37:08,649 INFO L87 Difference]: Start difference. First operand 26336 states and 30312 transitions. Second operand 10 states. [2018-10-24 14:37:33,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:37:33,453 INFO L93 Difference]: Finished difference Result 187461 states and 225774 transitions. [2018-10-24 14:37:33,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-24 14:37:33,463 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1046 [2018-10-24 14:37:33,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:37:33,771 INFO L225 Difference]: With dead ends: 187461 [2018-10-24 14:37:33,771 INFO L226 Difference]: Without dead ends: 161818 [2018-10-24 14:37:33,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1096 GetRequests, 1067 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2018-10-24 14:37:33,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161818 states. [2018-10-24 14:37:35,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161818 to 65032. [2018-10-24 14:37:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65032 states. [2018-10-24 14:37:35,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65032 states to 65032 states and 71486 transitions. [2018-10-24 14:37:35,106 INFO L78 Accepts]: Start accepts. Automaton has 65032 states and 71486 transitions. Word has length 1046 [2018-10-24 14:37:35,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:37:35,108 INFO L481 AbstractCegarLoop]: Abstraction has 65032 states and 71486 transitions. [2018-10-24 14:37:35,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 14:37:35,109 INFO L276 IsEmpty]: Start isEmpty. Operand 65032 states and 71486 transitions. [2018-10-24 14:37:35,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1068 [2018-10-24 14:37:35,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:37:35,159 INFO L375 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:37:35,160 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:37:35,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:37:35,160 INFO L82 PathProgramCache]: Analyzing trace with hash -633946417, now seen corresponding path program 1 times [2018-10-24 14:37:35,160 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:37:35,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:37:35,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:37:35,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:37:35,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:37:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:37:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2018-10-24 14:37:36,620 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:37:36,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:37:36,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:37:36,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:37:36,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:37:36,622 INFO L87 Difference]: Start difference. First operand 65032 states and 71486 transitions. Second operand 4 states. [2018-10-24 14:37:41,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:37:41,747 INFO L93 Difference]: Finished difference Result 140413 states and 156529 transitions. [2018-10-24 14:37:41,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:37:41,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1067 [2018-10-24 14:37:41,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:37:41,844 INFO L225 Difference]: With dead ends: 140413 [2018-10-24 14:37:41,844 INFO L226 Difference]: Without dead ends: 76074 [2018-10-24 14:37:41,890 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 [2018-10-24 14:37:41,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76074 states. [2018-10-24 14:37:42,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76074 to 72619. [2018-10-24 14:37:42,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72619 states. [2018-10-24 14:37:42,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72619 states to 72619 states and 78010 transitions. [2018-10-24 14:37:42,559 INFO L78 Accepts]: Start accepts. Automaton has 72619 states and 78010 transitions. Word has length 1067 [2018-10-24 14:37:42,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:37:42,561 INFO L481 AbstractCegarLoop]: Abstraction has 72619 states and 78010 transitions. [2018-10-24 14:37:42,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:37:42,561 INFO L276 IsEmpty]: Start isEmpty. Operand 72619 states and 78010 transitions. [2018-10-24 14:37:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1509 [2018-10-24 14:37:42,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:37:42,646 INFO L375 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2018-10-24 14:37:42,646 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:37:42,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:37:42,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1575986019, now seen corresponding path program 1 times [2018-10-24 14:37:42,647 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:37:42,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:37:42,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:37:42,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:37:42,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:37:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:37:43,825 WARN L179 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2018-10-24 14:37:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1813 backedges. 1317 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2018-10-24 14:37:45,223 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:37:45,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:37:45,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:37:45,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:37:45,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:37:45,226 INFO L87 Difference]: Start difference. First operand 72619 states and 78010 transitions. Second operand 4 states. [2018-10-24 14:37:51,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:37:51,251 INFO L93 Difference]: Finished difference Result 189460 states and 203780 transitions. [2018-10-24 14:37:51,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:37:51,251 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1508 [2018-10-24 14:37:51,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:37:51,401 INFO L225 Difference]: With dead ends: 189460 [2018-10-24 14:37:51,401 INFO L226 Difference]: Without dead ends: 117534 [2018-10-24 14:37:51,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:37:51,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117534 states. [2018-10-24 14:37:52,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117534 to 111315. [2018-10-24 14:37:52,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111315 states. [2018-10-24 14:37:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111315 states to 111315 states and 118479 transitions. [2018-10-24 14:37:52,407 INFO L78 Accepts]: Start accepts. Automaton has 111315 states and 118479 transitions. Word has length 1508 [2018-10-24 14:37:52,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:37:52,408 INFO L481 AbstractCegarLoop]: Abstraction has 111315 states and 118479 transitions. [2018-10-24 14:37:52,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:37:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 111315 states and 118479 transitions. [2018-10-24 14:37:52,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1561 [2018-10-24 14:37:52,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:37:52,478 INFO L375 BasicCegarLoop]: trace histogram [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, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2018-10-24 14:37:52,479 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:37:52,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:37:52,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1587940758, now seen corresponding path program 1 times [2018-10-24 14:37:52,479 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:37:52,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:37:52,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:37:52,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:37:52,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:37:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:37:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1160 proven. 0 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2018-10-24 14:37:54,972 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:37:54,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:37:54,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:37:54,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:37:54,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:37:54,974 INFO L87 Difference]: Start difference. First operand 111315 states and 118479 transitions. Second operand 4 states. [2018-10-24 14:38:00,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:38:00,293 INFO L93 Difference]: Finished difference Result 233684 states and 248891 transitions. [2018-10-24 14:38:00,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:38:00,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1560 [2018-10-24 14:38:00,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:38:00,402 INFO L225 Difference]: With dead ends: 233684 [2018-10-24 14:38:00,402 INFO L226 Difference]: Without dead ends: 110601 [2018-10-24 14:38:00,453 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 [2018-10-24 14:38:00,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110601 states. [2018-10-24 14:38:01,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110601 to 109910. [2018-10-24 14:38:01,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109910 states. [2018-10-24 14:38:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109910 states to 109910 states and 114343 transitions. [2018-10-24 14:38:01,405 INFO L78 Accepts]: Start accepts. Automaton has 109910 states and 114343 transitions. Word has length 1560 [2018-10-24 14:38:01,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:38:01,407 INFO L481 AbstractCegarLoop]: Abstraction has 109910 states and 114343 transitions. [2018-10-24 14:38:01,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:38:01,407 INFO L276 IsEmpty]: Start isEmpty. Operand 109910 states and 114343 transitions. [2018-10-24 14:38:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1723 [2018-10-24 14:38:01,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:38:01,486 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 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, 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, 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] [2018-10-24 14:38:01,487 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:38:01,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:38:01,487 INFO L82 PathProgramCache]: Analyzing trace with hash 457997503, now seen corresponding path program 1 times [2018-10-24 14:38:01,488 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:38:01,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:38:01,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:38:01,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:38:01,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:38:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:38:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2615 backedges. 1515 proven. 1008 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-10-24 14:38:07,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:38:07,366 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-24 14:38:07,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:38:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:38:07,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:38:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2615 backedges. 1916 proven. 0 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2018-10-24 14:38:09,111 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:38:09,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2018-10-24 14:38:09,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 14:38:09,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 14:38:09,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-10-24 14:38:09,114 INFO L87 Difference]: Start difference. First operand 109910 states and 114343 transitions. Second operand 12 states. [2018-10-24 14:38:27,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:38:27,380 INFO L93 Difference]: Finished difference Result 259926 states and 270554 transitions. [2018-10-24 14:38:27,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-24 14:38:27,383 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1722 [2018-10-24 14:38:27,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:38:27,549 INFO L225 Difference]: With dead ends: 259926 [2018-10-24 14:38:27,549 INFO L226 Difference]: Without dead ends: 150709 [2018-10-24 14:38:27,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1781 GetRequests, 1743 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2018-10-24 14:38:27,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150709 states. [2018-10-24 14:38:28,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150709 to 103691. [2018-10-24 14:38:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103691 states. [2018-10-24 14:38:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103691 states to 103691 states and 106149 transitions. [2018-10-24 14:38:29,480 INFO L78 Accepts]: Start accepts. Automaton has 103691 states and 106149 transitions. Word has length 1722 [2018-10-24 14:38:29,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:38:29,482 INFO L481 AbstractCegarLoop]: Abstraction has 103691 states and 106149 transitions. [2018-10-24 14:38:29,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 14:38:29,482 INFO L276 IsEmpty]: Start isEmpty. Operand 103691 states and 106149 transitions. [2018-10-24 14:38:29,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1793 [2018-10-24 14:38:29,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:38:29,558 INFO L375 BasicCegarLoop]: trace histogram [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, 7, 7, 7, 6, 6, 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, 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, 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, 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, 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] [2018-10-24 14:38:29,558 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:38:29,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:38:29,560 INFO L82 PathProgramCache]: Analyzing trace with hash 603042489, now seen corresponding path program 1 times [2018-10-24 14:38:29,560 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:38:29,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:38:29,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:38:29,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:38:29,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:38:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:38:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3056 backedges. 2287 proven. 70 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2018-10-24 14:38:32,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:38:32,646 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 [2018-10-24 14:38:32,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:38:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:38:33,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:38:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3056 backedges. 2287 proven. 70 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2018-10-24 14:38:35,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:38:35,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-24 14:38:35,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:38:35,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:38:35,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:38:35,082 INFO L87 Difference]: Start difference. First operand 103691 states and 106149 transitions. Second operand 4 states. [2018-10-24 14:38:44,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:38:44,278 INFO L93 Difference]: Finished difference Result 220508 states and 225864 transitions. [2018-10-24 14:38:44,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:38:44,278 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1792 [2018-10-24 14:38:44,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:38:44,404 INFO L225 Difference]: With dead ends: 220508 [2018-10-24 14:38:44,404 INFO L226 Difference]: Without dead ends: 117510 [2018-10-24 14:38:44,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1796 GetRequests, 1792 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:38:44,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117510 states. [2018-10-24 14:38:45,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117510 to 109218. [2018-10-24 14:38:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109218 states. [2018-10-24 14:38:45,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109218 states to 109218 states and 111760 transitions. [2018-10-24 14:38:45,546 INFO L78 Accepts]: Start accepts. Automaton has 109218 states and 111760 transitions. Word has length 1792 [2018-10-24 14:38:45,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:38:45,547 INFO L481 AbstractCegarLoop]: Abstraction has 109218 states and 111760 transitions. [2018-10-24 14:38:45,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:38:45,547 INFO L276 IsEmpty]: Start isEmpty. Operand 109218 states and 111760 transitions. [2018-10-24 14:38:45,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1884 [2018-10-24 14:38:45,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:38:45,628 INFO L375 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 3, 3, 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, 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] [2018-10-24 14:38:45,628 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:38:45,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:38:45,629 INFO L82 PathProgramCache]: Analyzing trace with hash -491800528, now seen corresponding path program 1 times [2018-10-24 14:38:45,629 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:38:45,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:38:45,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:38:45,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:38:45,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:38:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:38:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 2118 proven. 0 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2018-10-24 14:38:47,879 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:38:47,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:38:47,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:38:47,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:38:47,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:38:47,880 INFO L87 Difference]: Start difference. First operand 109218 states and 111760 transitions. Second operand 4 states. [2018-10-24 14:38:55,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:38:55,451 INFO L93 Difference]: Finished difference Result 227412 states and 232797 transitions. [2018-10-24 14:38:55,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:38:55,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1883 [2018-10-24 14:38:55,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:38:55,566 INFO L225 Difference]: With dead ends: 227412 [2018-10-24 14:38:55,566 INFO L226 Difference]: Without dead ends: 118887 [2018-10-24 14:38:55,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:38:55,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118887 states. [2018-10-24 14:38:56,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118887 to 114050. [2018-10-24 14:38:56,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114050 states. [2018-10-24 14:38:56,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114050 states to 114050 states and 116141 transitions. [2018-10-24 14:38:56,669 INFO L78 Accepts]: Start accepts. Automaton has 114050 states and 116141 transitions. Word has length 1883 [2018-10-24 14:38:56,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:38:56,670 INFO L481 AbstractCegarLoop]: Abstraction has 114050 states and 116141 transitions. [2018-10-24 14:38:56,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:38:56,670 INFO L276 IsEmpty]: Start isEmpty. Operand 114050 states and 116141 transitions. [2018-10-24 14:38:56,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2006 [2018-10-24 14:38:56,748 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:38:56,749 INFO L375 BasicCegarLoop]: trace histogram [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, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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] [2018-10-24 14:38:56,749 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:38:56,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:38:56,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1803355823, now seen corresponding path program 1 times [2018-10-24 14:38:56,750 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:38:56,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:38:56,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:38:56,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:38:56,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:38:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:38:58,309 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2018-10-24 14:39:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3874 backedges. 2455 proven. 0 refuted. 0 times theorem prover too weak. 1419 trivial. 0 not checked. [2018-10-24 14:39:00,091 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:39:00,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:39:00,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:39:00,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:39:00,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:39:00,093 INFO L87 Difference]: Start difference. First operand 114050 states and 116141 transitions. Second operand 4 states. [2018-10-24 14:39:05,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:39:05,677 INFO L93 Difference]: Finished difference Result 232932 states and 237209 transitions. [2018-10-24 14:39:05,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:39:05,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 2005 [2018-10-24 14:39:05,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:39:05,815 INFO L225 Difference]: With dead ends: 232932 [2018-10-24 14:39:05,815 INFO L226 Difference]: Without dead ends: 119575 [2018-10-24 14:39:05,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:39:05,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119575 states. [2018-10-24 14:39:06,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119575 to 110592. [2018-10-24 14:39:06,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110592 states. [2018-10-24 14:39:06,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110592 states to 110592 states and 112471 transitions. [2018-10-24 14:39:06,977 INFO L78 Accepts]: Start accepts. Automaton has 110592 states and 112471 transitions. Word has length 2005 [2018-10-24 14:39:06,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:39:06,978 INFO L481 AbstractCegarLoop]: Abstraction has 110592 states and 112471 transitions. [2018-10-24 14:39:06,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:39:06,979 INFO L276 IsEmpty]: Start isEmpty. Operand 110592 states and 112471 transitions. [2018-10-24 14:39:07,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2124 [2018-10-24 14:39:07,056 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:39:07,057 INFO L375 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2018-10-24 14:39:07,057 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:39:07,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:39:07,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1319634156, now seen corresponding path program 1 times [2018-10-24 14:39:07,058 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:39:07,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:39:07,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:39:07,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:39:07,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:39:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:39:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4011 backedges. 3146 proven. 0 refuted. 0 times theorem prover too weak. 865 trivial. 0 not checked. [2018-10-24 14:39:10,518 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:39:10,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:39:10,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:39:10,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:39:10,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:39:10,520 INFO L87 Difference]: Start difference. First operand 110592 states and 112471 transitions. Second operand 4 states. [2018-10-24 14:39:15,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:39:15,527 INFO L93 Difference]: Finished difference Result 243293 states and 247474 transitions. [2018-10-24 14:39:15,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:39:15,530 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 2123 [2018-10-24 14:39:15,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:39:15,662 INFO L225 Difference]: With dead ends: 243293 [2018-10-24 14:39:15,662 INFO L226 Difference]: Without dead ends: 133394 [2018-10-24 14:39:15,724 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 [2018-10-24 14:39:15,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133394 states. [2018-10-24 14:39:17,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133394 to 127864. [2018-10-24 14:39:17,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127864 states. [2018-10-24 14:39:17,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127864 states to 127864 states and 129776 transitions. [2018-10-24 14:39:17,137 INFO L78 Accepts]: Start accepts. Automaton has 127864 states and 129776 transitions. Word has length 2123 [2018-10-24 14:39:17,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:39:17,138 INFO L481 AbstractCegarLoop]: Abstraction has 127864 states and 129776 transitions. [2018-10-24 14:39:17,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:39:17,138 INFO L276 IsEmpty]: Start isEmpty. Operand 127864 states and 129776 transitions. [2018-10-24 14:39:17,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2174 [2018-10-24 14:39:17,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:39:17,215 INFO L375 BasicCegarLoop]: trace histogram [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, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2018-10-24 14:39:17,215 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:39:17,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:39:17,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1779036097, now seen corresponding path program 1 times [2018-10-24 14:39:17,216 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:39:17,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:39:17,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:39:17,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:39:17,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:39:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:39:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4227 backedges. 2540 proven. 174 refuted. 0 times theorem prover too weak. 1513 trivial. 0 not checked. [2018-10-24 14:39:23,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:39:23,059 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 [2018-10-24 14:39:23,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:39:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:39:23,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:39:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4227 backedges. 2540 proven. 174 refuted. 0 times theorem prover too weak. 1513 trivial. 0 not checked. [2018-10-24 14:39:26,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:39:26,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-24 14:39:26,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:39:26,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:39:26,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:39:26,164 INFO L87 Difference]: Start difference. First operand 127864 states and 129776 transitions. Second operand 4 states. [2018-10-24 14:39:31,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:39:31,434 INFO L93 Difference]: Finished difference Result 257108 states and 260965 transitions. [2018-10-24 14:39:31,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:39:31,435 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 2173 [2018-10-24 14:39:31,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:39:31,622 INFO L225 Difference]: With dead ends: 257108 [2018-10-24 14:39:31,622 INFO L226 Difference]: Without dead ends: 129937 [2018-10-24 14:39:31,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2177 GetRequests, 2173 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:39:31,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129937 states. [2018-10-24 14:39:32,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129937 to 120263. [2018-10-24 14:39:32,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120263 states. [2018-10-24 14:39:33,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120263 states to 120263 states and 121949 transitions. [2018-10-24 14:39:33,055 INFO L78 Accepts]: Start accepts. Automaton has 120263 states and 121949 transitions. Word has length 2173 [2018-10-24 14:39:33,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:39:33,056 INFO L481 AbstractCegarLoop]: Abstraction has 120263 states and 121949 transitions. [2018-10-24 14:39:33,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:39:33,056 INFO L276 IsEmpty]: Start isEmpty. Operand 120263 states and 121949 transitions. [2018-10-24 14:39:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2285 [2018-10-24 14:39:33,122 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:39:33,124 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2018-10-24 14:39:33,124 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:39:33,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:39:33,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1433622822, now seen corresponding path program 1 times [2018-10-24 14:39:33,125 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:39:33,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:39:33,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:39:33,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:39:33,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:39:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:39:34,762 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-10-24 14:39:34,972 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 3 [2018-10-24 14:39:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4947 backedges. 3143 proven. 0 refuted. 0 times theorem prover too weak. 1804 trivial. 0 not checked. [2018-10-24 14:39:37,889 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:39:37,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 14:39:37,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:39:37,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:39:37,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:39:37,892 INFO L87 Difference]: Start difference. First operand 120263 states and 121949 transitions. Second operand 5 states. Received shutdown request... [2018-10-24 14:39:40,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:39:40,070 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 14:39:40,076 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 14:39:40,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:39:40 BoogieIcfgContainer [2018-10-24 14:39:40,076 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 14:39:40,077 INFO L168 Benchmark]: Toolchain (without parser) took 224317.48 ms. Allocated memory was 1.5 GB in the beginning and 4.4 GB in the end (delta: 2.9 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -725.1 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-10-24 14:39:40,079 INFO L168 Benchmark]: CDTParser took 0.24 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. [2018-10-24 14:39:40,079 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1634.31 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 148.0 MB). Peak memory consumption was 148.0 MB. Max. memory is 7.1 GB. [2018-10-24 14:39:40,080 INFO L168 Benchmark]: Boogie Procedure Inliner took 497.95 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 761.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -924.6 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. [2018-10-24 14:39:40,081 INFO L168 Benchmark]: Boogie Preprocessor took 241.39 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: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. [2018-10-24 14:39:40,082 INFO L168 Benchmark]: RCFGBuilder took 8418.43 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 533.3 MB). Peak memory consumption was 533.3 MB. Max. memory is 7.1 GB. [2018-10-24 14:39:40,082 INFO L168 Benchmark]: TraceAbstraction took 213518.01 ms. Allocated memory was 2.3 GB in the beginning and 4.4 GB in the end (delta: 2.1 GB). Free memory was 1.6 GB in the beginning and 2.1 GB in the end (delta: -509.7 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-10-24 14:39:40,087 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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 1634.31 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 148.0 MB). Peak memory consumption was 148.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 497.95 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 761.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -924.6 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 241.39 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: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8418.43 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 533.3 MB). Peak memory consumption was 533.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 213518.01 ms. Allocated memory was 2.3 GB in the beginning and 4.4 GB in the end (delta: 2.1 GB). Free memory was 1.6 GB in the beginning and 2.1 GB in the end (delta: -509.7 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 84). Cancelled while BasicCegarLoop was constructing difference of abstraction (120263states) and FLOYD_HOARE automaton (currently 4 states, 5 states before enhancement),while ReachableStatesComputation was computing reachable states (2681 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 758 locations, 1 error locations. TIMEOUT Result, 213.4s OverallTime, 16 OverallIterations, 8 TraceHistogramMax, 148.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 8077 SDtfs, 53321 SDslu, 2062 SDs, 0 SdLazy, 86290 SolverSat, 17266 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 113.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7190 GetRequests, 7076 SyntacticMatches, 13 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 6.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=127864occurred 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: 12.9s AutomataMinimizationTime, 15 MinimizatonAttempts, 199098 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 22.8s InterpolantComputationTime, 27642 NumberOfCodeBlocks, 27642 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 27621 ConstructedInterpolants, 0 QuantifiedInterpolants, 92481157 SizeOfPredicates, 0 NumberOfNonLiveVariables, 7956 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 21 InterpolantComputations, 14 PerfectInterpolantSequences, 41277/43277 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown