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/Problem15_label57_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 20:35:08,706 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 20:35:08,710 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 20:35:08,726 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 20:35:08,726 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 20:35:08,727 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 20:35:08,729 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 20:35:08,732 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 20:35:08,735 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 20:35:08,735 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 20:35:08,737 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 20:35:08,737 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 20:35:08,745 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 20:35:08,746 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 20:35:08,747 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 20:35:08,749 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 20:35:08,750 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 20:35:08,751 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 20:35:08,756 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 20:35:08,760 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 20:35:08,761 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 20:35:08,763 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 20:35:08,766 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 20:35:08,779 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 [2018-10-23 20:35:08,806 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 20:35:08,809 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 20:35:08,810 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 20:35:08,810 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 20:35:08,810 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 20:35:08,811 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 20:35:08,811 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 20:35:08,811 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 20:35:08,811 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 20:35:08,811 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 20:35:08,812 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 20:35:08,815 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 20:35:08,815 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 20:35:08,815 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 20:35:08,815 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 20:35:08,816 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 20:35:08,816 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 20:35:08,816 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 20:35:08,816 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 20:35:08,817 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:35:08,817 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 20:35:08,817 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 20:35:08,817 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 20:35:08,817 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 20:35:08,818 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 20:35:08,819 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 20:35:08,819 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 20:35:08,819 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 20:35:08,867 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 20:35:08,882 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 20:35:08,888 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 20:35:08,891 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 20:35:08,892 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 20:35:08,893 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label57_true-unreach-call.c [2018-10-23 20:35:08,949 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c2aa54402/6c96a5cec29048d08f92037adba4a9ba/FLAG120daf88d [2018-10-23 20:35:09,619 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 20:35:09,619 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label57_true-unreach-call.c [2018-10-23 20:35:09,639 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c2aa54402/6c96a5cec29048d08f92037adba4a9ba/FLAG120daf88d [2018-10-23 20:35:09,655 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c2aa54402/6c96a5cec29048d08f92037adba4a9ba [2018-10-23 20:35:09,666 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 20:35:09,668 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 20:35:09,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 20:35:09,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 20:35:09,676 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 20:35:09,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:35:09" (1/1) ... [2018-10-23 20:35:09,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58eb67ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:09, skipping insertion in model container [2018-10-23 20:35:09,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:35:09" (1/1) ... [2018-10-23 20:35:09,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 20:35:09,799 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 20:35:10,769 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:35:10,775 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 20:35:11,093 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:35:11,114 INFO L193 MainTranslator]: Completed translation [2018-10-23 20:35:11,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:11 WrapperNode [2018-10-23 20:35:11,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 20:35:11,115 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 20:35:11,116 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 20:35:11,116 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 20:35:11,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:11" (1/1) ... [2018-10-23 20:35:11,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:11" (1/1) ... [2018-10-23 20:35:11,497 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 20:35:11,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 20:35:11,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 20:35:11,497 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 20:35:11,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:11" (1/1) ... [2018-10-23 20:35:11,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:11" (1/1) ... [2018-10-23 20:35:11,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:11" (1/1) ... [2018-10-23 20:35:11,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:11" (1/1) ... [2018-10-23 20:35:11,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:11" (1/1) ... [2018-10-23 20:35:11,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:11" (1/1) ... [2018-10-23 20:35:11,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:11" (1/1) ... [2018-10-23 20:35:11,739 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 20:35:11,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 20:35:11,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 20:35:11,739 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 20:35:11,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:11" (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 [2018-10-23 20:35:11,808 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 20:35:11,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 20:35:11,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 20:35:19,354 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 20:35:19,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:35:19 BoogieIcfgContainer [2018-10-23 20:35:19,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 20:35:19,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 20:35:19,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 20:35:19,360 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 20:35:19,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:35:09" (1/3) ... [2018-10-23 20:35:19,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@153b6c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:35:19, skipping insertion in model container [2018-10-23 20:35:19,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:11" (2/3) ... [2018-10-23 20:35:19,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@153b6c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:35:19, skipping insertion in model container [2018-10-23 20:35:19,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:35:19" (3/3) ... [2018-10-23 20:35:19,365 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label57_true-unreach-call.c [2018-10-23 20:35:19,375 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 20:35:19,386 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 20:35:19,404 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 20:35:19,444 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 20:35:19,445 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 20:35:19,445 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 20:35:19,445 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 20:35:19,446 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 20:35:19,446 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 20:35:19,446 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 20:35:19,446 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 20:35:19,446 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 20:35:19,475 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states. [2018-10-23 20:35:19,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-23 20:35:19,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:35:19,485 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:35:19,488 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:35:19,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:35:19,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1057203130, now seen corresponding path program 1 times [2018-10-23 20:35:19,497 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:35:19,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:35:19,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:35:19,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:35:19,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:35:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:35:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:35:20,016 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:35:20,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:35:20,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:35:20,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:35:20,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:35:20,042 INFO L87 Difference]: Start difference. First operand 425 states. Second operand 4 states. [2018-10-23 20:35:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:35:27,788 INFO L93 Difference]: Finished difference Result 1471 states and 2719 transitions. [2018-10-23 20:35:27,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:35:27,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-10-23 20:35:27,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:35:27,820 INFO L225 Difference]: With dead ends: 1471 [2018-10-23 20:35:27,821 INFO L226 Difference]: Without dead ends: 1039 [2018-10-23 20:35:27,827 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 [2018-10-23 20:35:27,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2018-10-23 20:35:27,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1037. [2018-10-23 20:35:27,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1037 states. [2018-10-23 20:35:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1662 transitions. [2018-10-23 20:35:27,947 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1662 transitions. Word has length 42 [2018-10-23 20:35:27,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:35:27,948 INFO L481 AbstractCegarLoop]: Abstraction has 1037 states and 1662 transitions. [2018-10-23 20:35:27,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:35:27,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1662 transitions. [2018-10-23 20:35:27,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-23 20:35:27,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:35:27,954 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, 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] [2018-10-23 20:35:27,954 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:35:27,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:35:27,955 INFO L82 PathProgramCache]: Analyzing trace with hash -206840875, now seen corresponding path program 1 times [2018-10-23 20:35:27,955 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:35:27,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:35:27,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:35:27,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:35:27,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:35:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:35:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:35:28,288 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:35:28,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:35:28,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:35:28,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:35:28,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:35:28,291 INFO L87 Difference]: Start difference. First operand 1037 states and 1662 transitions. Second operand 4 states. [2018-10-23 20:35:33,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:35:33,846 INFO L93 Difference]: Finished difference Result 3939 states and 6385 transitions. [2018-10-23 20:35:33,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:35:33,847 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2018-10-23 20:35:33,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:35:33,864 INFO L225 Difference]: With dead ends: 3939 [2018-10-23 20:35:33,864 INFO L226 Difference]: Without dead ends: 2904 [2018-10-23 20:35:33,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:35:33,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2018-10-23 20:35:33,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 1938. [2018-10-23 20:35:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1938 states. [2018-10-23 20:35:33,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 2794 transitions. [2018-10-23 20:35:33,918 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 2794 transitions. Word has length 118 [2018-10-23 20:35:33,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:35:33,919 INFO L481 AbstractCegarLoop]: Abstraction has 1938 states and 2794 transitions. [2018-10-23 20:35:33,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:35:33,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 2794 transitions. [2018-10-23 20:35:33,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2018-10-23 20:35:33,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:35:33,930 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, 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, 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] [2018-10-23 20:35:33,931 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:35:33,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:35:33,931 INFO L82 PathProgramCache]: Analyzing trace with hash -950387328, now seen corresponding path program 1 times [2018-10-23 20:35:33,932 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:35:33,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:35:33,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:35:33,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:35:33,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:35:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:35:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-10-23 20:35:34,991 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:35:34,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:35:34,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:35:34,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:35:34,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:35:34,993 INFO L87 Difference]: Start difference. First operand 1938 states and 2794 transitions. Second operand 5 states. [2018-10-23 20:35:47,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:35:47,387 INFO L93 Difference]: Finished difference Result 4779 states and 6610 transitions. [2018-10-23 20:35:47,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:35:47,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 392 [2018-10-23 20:35:47,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:35:47,404 INFO L225 Difference]: With dead ends: 4779 [2018-10-23 20:35:47,404 INFO L226 Difference]: Without dead ends: 2843 [2018-10-23 20:35:47,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:35:47,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2843 states. [2018-10-23 20:35:47,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2843 to 2842. [2018-10-23 20:35:47,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2842 states. [2018-10-23 20:35:47,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 3761 transitions. [2018-10-23 20:35:47,464 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 3761 transitions. Word has length 392 [2018-10-23 20:35:47,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:35:47,465 INFO L481 AbstractCegarLoop]: Abstraction has 2842 states and 3761 transitions. [2018-10-23 20:35:47,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:35:47,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 3761 transitions. [2018-10-23 20:35:47,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2018-10-23 20:35:47,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:35:47,477 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, 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, 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] [2018-10-23 20:35:47,478 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:35:47,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:35:47,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1161204594, now seen corresponding path program 1 times [2018-10-23 20:35:47,478 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:35:47,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:35:47,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:35:47,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:35:47,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:35:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:35:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-23 20:35:48,100 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:35:48,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:35:48,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:35:48,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:35:48,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:35:48,103 INFO L87 Difference]: Start difference. First operand 2842 states and 3761 transitions. Second operand 4 states. [2018-10-23 20:35:55,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:35:55,739 INFO L93 Difference]: Finished difference Result 5983 states and 8140 transitions. [2018-10-23 20:35:55,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:35:55,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 466 [2018-10-23 20:35:55,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:35:55,760 INFO L225 Difference]: With dead ends: 5983 [2018-10-23 20:35:55,760 INFO L226 Difference]: Without dead ends: 3446 [2018-10-23 20:35:55,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:35:55,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2018-10-23 20:35:55,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 3444. [2018-10-23 20:35:55,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3444 states. [2018-10-23 20:35:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3444 states to 3444 states and 4309 transitions. [2018-10-23 20:35:55,825 INFO L78 Accepts]: Start accepts. Automaton has 3444 states and 4309 transitions. Word has length 466 [2018-10-23 20:35:55,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:35:55,826 INFO L481 AbstractCegarLoop]: Abstraction has 3444 states and 4309 transitions. [2018-10-23 20:35:55,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:35:55,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3444 states and 4309 transitions. [2018-10-23 20:35:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2018-10-23 20:35:55,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:35:55,839 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, 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, 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] [2018-10-23 20:35:55,839 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:35:55,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:35:55,839 INFO L82 PathProgramCache]: Analyzing trace with hash -537850778, now seen corresponding path program 1 times [2018-10-23 20:35:55,840 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:35:55,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:35:55,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:35:55,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:35:55,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:35:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:35:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 316 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-23 20:35:56,436 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:35:56,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:35:56,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:35:56,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:35:56,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:35:56,438 INFO L87 Difference]: Start difference. First operand 3444 states and 4309 transitions. Second operand 4 states. [2018-10-23 20:36:00,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:36:00,730 INFO L93 Difference]: Finished difference Result 7190 states and 9172 transitions. [2018-10-23 20:36:00,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:36:00,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 475 [2018-10-23 20:36:00,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:36:00,748 INFO L225 Difference]: With dead ends: 7190 [2018-10-23 20:36:00,748 INFO L226 Difference]: Without dead ends: 4051 [2018-10-23 20:36:00,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:36:00,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2018-10-23 20:36:00,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 4047. [2018-10-23 20:36:00,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4047 states. [2018-10-23 20:36:00,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 4877 transitions. [2018-10-23 20:36:00,823 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 4877 transitions. Word has length 475 [2018-10-23 20:36:00,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:36:00,824 INFO L481 AbstractCegarLoop]: Abstraction has 4047 states and 4877 transitions. [2018-10-23 20:36:00,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:36:00,825 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 4877 transitions. [2018-10-23 20:36:00,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2018-10-23 20:36:00,831 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:36:00,831 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:36:00,832 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:36:00,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:36:00,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1637377501, now seen corresponding path program 1 times [2018-10-23 20:36:00,832 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:36:00,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:36:00,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:36:00,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:36:00,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:36:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:36:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 335 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-10-23 20:36:01,429 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:36:01,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:36:01,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:36:01,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:36:01,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:36:01,430 INFO L87 Difference]: Start difference. First operand 4047 states and 4877 transitions. Second operand 3 states. [2018-10-23 20:36:04,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:36:04,460 INFO L93 Difference]: Finished difference Result 10189 states and 12204 transitions. [2018-10-23 20:36:04,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:36:04,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2018-10-23 20:36:04,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:36:04,487 INFO L225 Difference]: With dead ends: 10189 [2018-10-23 20:36:04,487 INFO L226 Difference]: Without dead ends: 6144 [2018-10-23 20:36:04,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:36:04,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6144 states. [2018-10-23 20:36:04,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6144 to 5544. [2018-10-23 20:36:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5544 states. [2018-10-23 20:36:04,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5544 states to 5544 states and 6480 transitions. [2018-10-23 20:36:04,595 INFO L78 Accepts]: Start accepts. Automaton has 5544 states and 6480 transitions. Word has length 496 [2018-10-23 20:36:04,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:36:04,596 INFO L481 AbstractCegarLoop]: Abstraction has 5544 states and 6480 transitions. [2018-10-23 20:36:04,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:36:04,596 INFO L276 IsEmpty]: Start isEmpty. Operand 5544 states and 6480 transitions. [2018-10-23 20:36:04,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2018-10-23 20:36:04,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:36:04,605 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-23 20:36:04,605 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:36:04,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:36:04,606 INFO L82 PathProgramCache]: Analyzing trace with hash -679040075, now seen corresponding path program 1 times [2018-10-23 20:36:04,606 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:36:04,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:36:04,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:36:04,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:36:04,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:36:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:36:05,049 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-10-23 20:36:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2018-10-23 20:36:05,389 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:36:05,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:36:05,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:36:05,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:36:05,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:36:05,391 INFO L87 Difference]: Start difference. First operand 5544 states and 6480 transitions. Second operand 4 states. [2018-10-23 20:36:12,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:36:12,585 INFO L93 Difference]: Finished difference Result 16471 states and 19329 transitions. [2018-10-23 20:36:12,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:36:12,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2018-10-23 20:36:12,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:36:12,612 INFO L225 Difference]: With dead ends: 16471 [2018-10-23 20:36:12,612 INFO L226 Difference]: Without dead ends: 7269 [2018-10-23 20:36:12,622 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 [2018-10-23 20:36:12,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7269 states. [2018-10-23 20:36:12,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7269 to 7269. [2018-10-23 20:36:12,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7269 states. [2018-10-23 20:36:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7269 states to 7269 states and 7628 transitions. [2018-10-23 20:36:12,730 INFO L78 Accepts]: Start accepts. Automaton has 7269 states and 7628 transitions. Word has length 499 [2018-10-23 20:36:12,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:36:12,730 INFO L481 AbstractCegarLoop]: Abstraction has 7269 states and 7628 transitions. [2018-10-23 20:36:12,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:36:12,730 INFO L276 IsEmpty]: Start isEmpty. Operand 7269 states and 7628 transitions. [2018-10-23 20:36:12,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2018-10-23 20:36:12,748 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:36:12,748 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, 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, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:36:12,749 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:36:12,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:36:12,749 INFO L82 PathProgramCache]: Analyzing trace with hash -885852833, now seen corresponding path program 1 times [2018-10-23 20:36:12,749 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:36:12,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:36:12,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:36:12,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:36:12,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:36:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:36:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1374 backedges. 1009 proven. 0 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2018-10-23 20:36:13,764 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:36:13,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:36:13,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:36:13,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:36:13,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:36:13,766 INFO L87 Difference]: Start difference. First operand 7269 states and 7628 transitions. Second operand 3 states. [2018-10-23 20:36:15,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:36:15,336 INFO L93 Difference]: Finished difference Result 17537 states and 18474 transitions. [2018-10-23 20:36:15,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:36:15,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 819 [2018-10-23 20:36:15,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:36:15,364 INFO L225 Difference]: With dead ends: 17537 [2018-10-23 20:36:15,364 INFO L226 Difference]: Without dead ends: 10570 [2018-10-23 20:36:15,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:36:15,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10570 states. [2018-10-23 20:36:15,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10570 to 8770. [2018-10-23 20:36:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8770 states. [2018-10-23 20:36:15,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8770 states to 8770 states and 9194 transitions. [2018-10-23 20:36:15,488 INFO L78 Accepts]: Start accepts. Automaton has 8770 states and 9194 transitions. Word has length 819 [2018-10-23 20:36:15,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:36:15,489 INFO L481 AbstractCegarLoop]: Abstraction has 8770 states and 9194 transitions. [2018-10-23 20:36:15,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:36:15,490 INFO L276 IsEmpty]: Start isEmpty. Operand 8770 states and 9194 transitions. [2018-10-23 20:36:15,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2018-10-23 20:36:15,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:36:15,510 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:36:15,510 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:36:15,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:36:15,510 INFO L82 PathProgramCache]: Analyzing trace with hash -637617602, now seen corresponding path program 1 times [2018-10-23 20:36:15,511 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:36:15,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:36:15,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:36:15,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:36:15,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:36:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:36:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 538 proven. 0 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2018-10-23 20:36:16,513 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:36:16,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:36:16,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:36:16,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:36:16,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:36:16,515 INFO L87 Difference]: Start difference. First operand 8770 states and 9194 transitions. Second operand 3 states. [2018-10-23 20:36:18,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:36:18,208 INFO L93 Difference]: Finished difference Result 18137 states and 19023 transitions. [2018-10-23 20:36:18,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:36:18,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 831 [2018-10-23 20:36:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:36:18,226 INFO L225 Difference]: With dead ends: 18137 [2018-10-23 20:36:18,226 INFO L226 Difference]: Without dead ends: 9669 [2018-10-23 20:36:18,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:36:18,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9669 states. [2018-10-23 20:36:18,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9669 to 8769. [2018-10-23 20:36:18,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8769 states. [2018-10-23 20:36:18,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8769 states to 8769 states and 9192 transitions. [2018-10-23 20:36:18,341 INFO L78 Accepts]: Start accepts. Automaton has 8769 states and 9192 transitions. Word has length 831 [2018-10-23 20:36:18,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:36:18,342 INFO L481 AbstractCegarLoop]: Abstraction has 8769 states and 9192 transitions. [2018-10-23 20:36:18,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:36:18,342 INFO L276 IsEmpty]: Start isEmpty. Operand 8769 states and 9192 transitions. [2018-10-23 20:36:18,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 853 [2018-10-23 20:36:18,361 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:36:18,362 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:36:18,362 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:36:18,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:36:18,362 INFO L82 PathProgramCache]: Analyzing trace with hash 256118363, now seen corresponding path program 1 times [2018-10-23 20:36:18,363 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:36:18,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:36:18,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:36:18,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:36:18,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:36:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:36:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 40 proven. 537 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2018-10-23 20:36:20,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:36:20,391 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 [2018-10-23 20:36:20,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:36:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:36:20,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:36:21,979 WARN L854 $PredicateComparison]: unable to prove that (or (exists ((v_~a0~0_825 Int)) (and (<= (+ v_~a0~0_825 44) 0) (<= (mod v_~a0~0_825 299926) (+ c_~a0~0 300074)) (<= 0 v_~a0~0_825))) (exists ((v_prenex_1 Int)) (let ((.cse0 (mod v_prenex_1 299926))) (and (not (= .cse0 0)) (< v_prenex_1 0) (<= (+ v_prenex_1 44) 0) (<= .cse0 (+ c_~a0~0 600000))))) (exists ((v_prenex_2 Int)) (let ((.cse1 (mod v_prenex_2 299926))) (and (= .cse1 0) (<= (+ v_prenex_2 44) 0) (<= .cse1 (+ c_~a0~0 300074)))))) is different from true [2018-10-23 20:36:26,805 WARN L179 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 164 DAG size of output: 23 [2018-10-23 20:36:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 483 trivial. 458 not checked. [2018-10-23 20:36:29,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:36:29,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-10-23 20:36:29,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 20:36:29,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 20:36:29,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=35, Unknown=1, NotChecked=12, Total=72 [2018-10-23 20:36:29,457 INFO L87 Difference]: Start difference. First operand 8769 states and 9192 transitions. Second operand 9 states. [2018-10-23 20:37:12,227 WARN L179 SmtUtils]: Spent 5.59 s on a formula simplification. DAG size of input: 38 DAG size of output: 19 [2018-10-23 20:37:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:37:26,894 INFO L93 Difference]: Finished difference Result 29120 states and 30611 transitions. [2018-10-23 20:37:26,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 20:37:26,895 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 852 [2018-10-23 20:37:26,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:37:26,930 INFO L225 Difference]: With dead ends: 29120 [2018-10-23 20:37:26,930 INFO L226 Difference]: Without dead ends: 20653 [2018-10-23 20:37:26,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 860 GetRequests, 849 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=42, Invalid=70, Unknown=2, NotChecked=18, Total=132 [2018-10-23 20:37:26,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20653 states. [2018-10-23 20:37:27,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20653 to 17344. [2018-10-23 20:37:27,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17344 states. [2018-10-23 20:37:27,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17344 states to 17344 states and 18228 transitions. [2018-10-23 20:37:27,237 INFO L78 Accepts]: Start accepts. Automaton has 17344 states and 18228 transitions. Word has length 852 [2018-10-23 20:37:27,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:37:27,238 INFO L481 AbstractCegarLoop]: Abstraction has 17344 states and 18228 transitions. [2018-10-23 20:37:27,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 20:37:27,239 INFO L276 IsEmpty]: Start isEmpty. Operand 17344 states and 18228 transitions. [2018-10-23 20:37:27,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 884 [2018-10-23 20:37:27,271 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:37:27,272 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:37:27,272 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:37:27,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:37:27,272 INFO L82 PathProgramCache]: Analyzing trace with hash -578528063, now seen corresponding path program 1 times [2018-10-23 20:37:27,273 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:37:27,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:37:27,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:37:27,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:37:27,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:37:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:37:27,945 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2018-10-23 20:37:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 1098 proven. 0 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2018-10-23 20:37:28,338 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:37:28,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:37:28,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:37:28,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:37:28,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:37:28,340 INFO L87 Difference]: Start difference. First operand 17344 states and 18228 transitions. Second operand 4 states. [2018-10-23 20:37:31,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:37:31,644 INFO L93 Difference]: Finished difference Result 49405 states and 51906 transitions. [2018-10-23 20:37:31,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:37:31,645 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 883 [2018-10-23 20:37:31,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:37:31,711 INFO L225 Difference]: With dead ends: 49405 [2018-10-23 20:37:31,711 INFO L226 Difference]: Without dead ends: 32363 [2018-10-23 20:37:31,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:37:31,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32363 states. [2018-10-23 20:37:32,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32363 to 30541. [2018-10-23 20:37:32,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30541 states. [2018-10-23 20:37:32,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30541 states to 30541 states and 31846 transitions. [2018-10-23 20:37:32,394 INFO L78 Accepts]: Start accepts. Automaton has 30541 states and 31846 transitions. Word has length 883 [2018-10-23 20:37:32,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:37:32,395 INFO L481 AbstractCegarLoop]: Abstraction has 30541 states and 31846 transitions. [2018-10-23 20:37:32,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:37:32,395 INFO L276 IsEmpty]: Start isEmpty. Operand 30541 states and 31846 transitions. [2018-10-23 20:37:32,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 960 [2018-10-23 20:37:32,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:37:32,453 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, 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, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:37:32,453 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:37:32,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:37:32,454 INFO L82 PathProgramCache]: Analyzing trace with hash 646601708, now seen corresponding path program 1 times [2018-10-23 20:37:32,454 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:37:32,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:37:32,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:37:32,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:37:32,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:37:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:37:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 1042 proven. 196 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2018-10-23 20:37:33,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:37:33,768 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-23 20:37:33,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:37:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:37:34,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:37:58,473 WARN L179 SmtUtils]: Spent 24.33 s on a formula simplification. DAG size of input: 122 DAG size of output: 87 [2018-10-23 20:38:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 795 proven. 0 refuted. 0 times theorem prover too weak. 977 trivial. 0 not checked. [2018-10-23 20:38:04,025 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:38:04,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-23 20:38:04,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 20:38:04,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 20:38:04,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:38:04,027 INFO L87 Difference]: Start difference. First operand 30541 states and 31846 transitions. Second operand 6 states. [2018-10-23 20:38:16,619 WARN L179 SmtUtils]: Spent 12.53 s on a formula simplification that was a NOOP. DAG size: 93 [2018-10-23 20:38:44,222 WARN L179 SmtUtils]: Spent 16.88 s on a formula simplification. DAG size of input: 92 DAG size of output: 57 [2018-10-23 20:39:10,614 WARN L179 SmtUtils]: Spent 16.28 s on a formula simplification. DAG size of input: 92 DAG size of output: 57 Received shutdown request... [2018-10-23 20:39:23,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 20:39:23,972 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 20:39:23,977 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 20:39:23,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:39:23 BoogieIcfgContainer [2018-10-23 20:39:23,978 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 20:39:23,979 INFO L168 Benchmark]: Toolchain (without parser) took 254311.64 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 3.8 GB in the end (delta: -2.4 GB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-10-23 20:39:23,980 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 20:39:23,980 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1444.90 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: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. [2018-10-23 20:39:23,981 INFO L168 Benchmark]: Boogie Procedure Inliner took 381.57 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 736.1 MB). Free memory was 1.3 GB in the beginning and 2.1 GB in the end (delta: -859.7 MB). Peak memory consumption was 33.4 MB. Max. memory is 7.1 GB. [2018-10-23 20:39:23,982 INFO L168 Benchmark]: Boogie Preprocessor took 241.68 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. [2018-10-23 20:39:23,983 INFO L168 Benchmark]: RCFGBuilder took 7616.52 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.8 GB in the end (delta: 319.7 MB). Peak memory consumption was 319.7 MB. Max. memory is 7.1 GB. [2018-10-23 20:39:23,984 INFO L168 Benchmark]: TraceAbstraction took 244621.13 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.8 GB in the beginning and 3.8 GB in the end (delta: -2.0 GB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-10-23 20:39:23,991 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 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1444.90 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: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 381.57 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 736.1 MB). Free memory was 1.3 GB in the beginning and 2.1 GB in the end (delta: -859.7 MB). Peak memory consumption was 33.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 241.68 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7616.52 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.8 GB in the end (delta: 319.7 MB). Peak memory consumption was 319.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 244621.13 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.8 GB in the beginning and 3.8 GB in the end (delta: -2.0 GB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 130]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 130). Cancelled while BasicCegarLoop was constructing difference of abstraction (30541states) and FLOYD_HOARE automaton (currently 7 states, 6 states before enhancement),while ReachableStatesComputation was computing reachable states (2135 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 425 locations, 1 error locations. TIMEOUT Result, 244.5s OverallTime, 12 OverallIterations, 6 TraceHistogramMax, 192.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3863 SDtfs, 7818 SDslu, 1359 SDs, 0 SdLazy, 21921 SolverSat, 3285 SolverUnsat, 29 SolverUnknown, 0 SolverNotchecked, 131.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1873 GetRequests, 1826 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 84.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30541occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 11 MinimizatonAttempts, 9406 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 44.0s InterpolantComputationTime, 8643 NumberOfCodeBlocks, 8643 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 8629 ConstructedInterpolants, 353 QuantifiedInterpolants, 62899110 SizeOfPredicates, 1 NumberOfNonLiveVariables, 2087 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 14 InterpolantComputations, 11 PerfectInterpolantSequences, 10561/11871 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown