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/Problem17_label43_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:51:17,768 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:51:17,770 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:51:17,781 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:51:17,784 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:51:17,785 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:51:17,786 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:51:17,789 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:51:17,790 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:51:17,792 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:51:17,793 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:51:17,793 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:51:17,796 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:51:17,797 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:51:17,798 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:51:17,799 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:51:17,802 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:51:17,803 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:51:17,813 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:51:17,814 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:51:17,815 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:51:17,816 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:51:17,819 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 16:51:17,826 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 16:51:17,841 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:51:17,841 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:51:17,842 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:51:17,842 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:51:17,842 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:51:17,843 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:51:17,843 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:51:17,843 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:51:17,843 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:51:17,843 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:51:17,844 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:51:17,844 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:51:17,844 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:51:17,844 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:51:17,844 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:51:17,845 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:51:17,845 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:51:17,845 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:51:17,845 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:51:17,845 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:51:17,846 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:51:17,846 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:51:17,846 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:51:17,846 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:51:17,846 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:51:17,846 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:51:17,847 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:51:17,847 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:51:17,901 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:51:17,918 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:51:17,922 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:51:17,923 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:51:17,923 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:51:17,924 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label43_true-unreach-call.c [2018-10-24 16:51:17,982 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a5800e136/2a35dffb28da46168c40945d3f596b82/FLAG11dee12c8 [2018-10-24 16:51:18,702 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:51:18,703 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label43_true-unreach-call.c [2018-10-24 16:51:18,730 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a5800e136/2a35dffb28da46168c40945d3f596b82/FLAG11dee12c8 [2018-10-24 16:51:18,749 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a5800e136/2a35dffb28da46168c40945d3f596b82 [2018-10-24 16:51:18,760 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:51:18,762 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:51:18,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:51:18,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:51:18,768 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:51:18,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:51:18" (1/1) ... [2018-10-24 16:51:18,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b4aab1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:51:18, skipping insertion in model container [2018-10-24 16:51:18,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:51:18" (1/1) ... [2018-10-24 16:51:18,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:51:18,908 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:51:19,829 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:51:19,834 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:51:20,265 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:51:20,290 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:51:20,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:51:20 WrapperNode [2018-10-24 16:51:20,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:51:20,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:51:20,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:51:20,293 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:51:20,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:51:20" (1/1) ... [2018-10-24 16:51:20,357 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:51:20" (1/1) ... [2018-10-24 16:51:20,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:51:20,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:51:20,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:51:20,863 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:51:20,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:51:20" (1/1) ... [2018-10-24 16:51:20,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:51:20" (1/1) ... [2018-10-24 16:51:20,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:51:20" (1/1) ... [2018-10-24 16:51:20,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:51:20" (1/1) ... [2018-10-24 16:51:21,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:51:20" (1/1) ... [2018-10-24 16:51:21,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:51:20" (1/1) ... [2018-10-24 16:51:21,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:51:20" (1/1) ... [2018-10-24 16:51:21,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:51:21,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:51:21,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:51:21,184 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:51:21,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:51:20" (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 16:51:21,253 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:51:21,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:51:21,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:51:31,004 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:51:31,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:51:31 BoogieIcfgContainer [2018-10-24 16:51:31,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:51:31,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:51:31,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:51:31,010 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:51:31,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:51:18" (1/3) ... [2018-10-24 16:51:31,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd274ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:51:31, skipping insertion in model container [2018-10-24 16:51:31,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:51:20" (2/3) ... [2018-10-24 16:51:31,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd274ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:51:31, skipping insertion in model container [2018-10-24 16:51:31,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:51:31" (3/3) ... [2018-10-24 16:51:31,014 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label43_true-unreach-call.c [2018-10-24 16:51:31,025 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:51:31,036 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:51:31,054 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:51:31,098 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:51:31,099 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:51:31,099 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:51:31,099 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:51:31,099 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:51:31,099 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:51:31,099 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:51:31,100 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:51:31,100 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:51:31,144 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states. [2018-10-24 16:51:31,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-24 16:51:31,162 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:51:31,164 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:51:31,166 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:51:31,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:51:31,174 INFO L82 PathProgramCache]: Analyzing trace with hash 265969354, now seen corresponding path program 1 times [2018-10-24 16:51:31,176 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:51:31,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:51:31,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:51:31,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:51:31,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:51:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:51:31,662 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 16:51:31,665 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:51:31,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:51:31,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:51:31,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:51:31,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:51:31,691 INFO L87 Difference]: Start difference. First operand 591 states. Second operand 4 states. [2018-10-24 16:51:44,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:51:44,573 INFO L93 Difference]: Finished difference Result 2078 states and 3883 transitions. [2018-10-24 16:51:44,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:51:44,576 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2018-10-24 16:51:44,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:51:44,609 INFO L225 Difference]: With dead ends: 2078 [2018-10-24 16:51:44,610 INFO L226 Difference]: Without dead ends: 1480 [2018-10-24 16:51:44,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 16:51:44,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2018-10-24 16:51:44,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1019. [2018-10-24 16:51:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1019 states. [2018-10-24 16:51:44,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1572 transitions. [2018-10-24 16:51:44,738 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1572 transitions. Word has length 63 [2018-10-24 16:51:44,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:51:44,739 INFO L481 AbstractCegarLoop]: Abstraction has 1019 states and 1572 transitions. [2018-10-24 16:51:44,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:51:44,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1572 transitions. [2018-10-24 16:51:44,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-24 16:51:44,748 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:51:44,749 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, 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] [2018-10-24 16:51:44,749 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:51:44,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:51:44,749 INFO L82 PathProgramCache]: Analyzing trace with hash 620356926, now seen corresponding path program 1 times [2018-10-24 16:51:44,750 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:51:44,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:51:44,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:51:44,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:51:44,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:51:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:51:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:51:45,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:51:45,142 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 16:51:45,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:51:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:51:45,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:51:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:51:45,461 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:51:45,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-24 16:51:45,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 16:51:45,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 16:51:45,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:51:45,466 INFO L87 Difference]: Start difference. First operand 1019 states and 1572 transitions. Second operand 6 states. [2018-10-24 16:52:00,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:52:00,931 INFO L93 Difference]: Finished difference Result 4293 states and 6868 transitions. [2018-10-24 16:52:00,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 16:52:00,932 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2018-10-24 16:52:00,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:52:00,953 INFO L225 Difference]: With dead ends: 4293 [2018-10-24 16:52:00,953 INFO L226 Difference]: Without dead ends: 3276 [2018-10-24 16:52:00,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:52:00,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2018-10-24 16:52:01,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 3264. [2018-10-24 16:52:01,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3264 states. [2018-10-24 16:52:01,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3264 states to 3264 states and 4791 transitions. [2018-10-24 16:52:01,034 INFO L78 Accepts]: Start accepts. Automaton has 3264 states and 4791 transitions. Word has length 134 [2018-10-24 16:52:01,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:52:01,035 INFO L481 AbstractCegarLoop]: Abstraction has 3264 states and 4791 transitions. [2018-10-24 16:52:01,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 16:52:01,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3264 states and 4791 transitions. [2018-10-24 16:52:01,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-10-24 16:52:01,040 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:52:01,041 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, 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] [2018-10-24 16:52:01,041 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:52:01,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:52:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2014842391, now seen corresponding path program 1 times [2018-10-24 16:52:01,041 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:52:01,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:52:01,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:01,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:52:01,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:52:01,525 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 6 [2018-10-24 16:52:01,836 WARN L179 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 6 [2018-10-24 16:52:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:52:01,890 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:52:01,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:52:01,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:52:01,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:52:01,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:52:01,893 INFO L87 Difference]: Start difference. First operand 3264 states and 4791 transitions. Second operand 5 states. [2018-10-24 16:52:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:52:14,254 INFO L93 Difference]: Finished difference Result 14759 states and 21773 transitions. [2018-10-24 16:52:14,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:52:14,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2018-10-24 16:52:14,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:52:14,311 INFO L225 Difference]: With dead ends: 14759 [2018-10-24 16:52:14,311 INFO L226 Difference]: Without dead ends: 11497 [2018-10-24 16:52:14,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:52:14,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11497 states. [2018-10-24 16:52:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11497 to 6249. [2018-10-24 16:52:14,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6249 states. [2018-10-24 16:52:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6249 states to 6249 states and 8433 transitions. [2018-10-24 16:52:14,471 INFO L78 Accepts]: Start accepts. Automaton has 6249 states and 8433 transitions. Word has length 169 [2018-10-24 16:52:14,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:52:14,472 INFO L481 AbstractCegarLoop]: Abstraction has 6249 states and 8433 transitions. [2018-10-24 16:52:14,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:52:14,472 INFO L276 IsEmpty]: Start isEmpty. Operand 6249 states and 8433 transitions. [2018-10-24 16:52:14,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-24 16:52:14,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:52:14,477 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:52:14,477 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:52:14,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:52:14,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1332512410, now seen corresponding path program 1 times [2018-10-24 16:52:14,478 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:52:14,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:52:14,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:14,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:52:14,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:52:14,768 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-10-24 16:52:14,768 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:52:14,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 16:52:14,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:52:14,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:52:14,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:52:14,770 INFO L87 Difference]: Start difference. First operand 6249 states and 8433 transitions. Second operand 3 states. [2018-10-24 16:52:18,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:52:18,580 INFO L93 Difference]: Finished difference Result 17164 states and 23439 transitions. [2018-10-24 16:52:18,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:52:18,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 238 [2018-10-24 16:52:18,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:52:18,620 INFO L225 Difference]: With dead ends: 17164 [2018-10-24 16:52:18,620 INFO L226 Difference]: Without dead ends: 9147 [2018-10-24 16:52:18,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:52:18,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9147 states. [2018-10-24 16:52:18,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9147 to 8717. [2018-10-24 16:52:18,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8717 states. [2018-10-24 16:52:18,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8717 states to 8717 states and 10134 transitions. [2018-10-24 16:52:18,769 INFO L78 Accepts]: Start accepts. Automaton has 8717 states and 10134 transitions. Word has length 238 [2018-10-24 16:52:18,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:52:18,770 INFO L481 AbstractCegarLoop]: Abstraction has 8717 states and 10134 transitions. [2018-10-24 16:52:18,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:52:18,770 INFO L276 IsEmpty]: Start isEmpty. Operand 8717 states and 10134 transitions. [2018-10-24 16:52:18,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-10-24 16:52:18,775 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:52:18,775 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:52:18,776 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:52:18,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:52:18,776 INFO L82 PathProgramCache]: Analyzing trace with hash 502042689, now seen corresponding path program 1 times [2018-10-24 16:52:18,776 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:52:18,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:52:18,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:18,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:52:18,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:52:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 143 proven. 5 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-10-24 16:52:19,209 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:52:19,209 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 16:52:19,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:52:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:52:19,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:52:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-10-24 16:52:19,524 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:52:19,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-24 16:52:19,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:52:19,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:52:19,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:52:19,527 INFO L87 Difference]: Start difference. First operand 8717 states and 10134 transitions. Second operand 5 states. [2018-10-24 16:52:25,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:52:25,008 INFO L93 Difference]: Finished difference Result 21691 states and 25724 transitions. [2018-10-24 16:52:25,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:52:25,018 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 251 [2018-10-24 16:52:25,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:52:25,058 INFO L225 Difference]: With dead ends: 21691 [2018-10-24 16:52:25,058 INFO L226 Difference]: Without dead ends: 12976 [2018-10-24 16:52:25,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:52:25,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12976 states. [2018-10-24 16:52:25,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12976 to 12975. [2018-10-24 16:52:25,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12975 states. [2018-10-24 16:52:25,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12975 states to 12975 states and 14813 transitions. [2018-10-24 16:52:25,231 INFO L78 Accepts]: Start accepts. Automaton has 12975 states and 14813 transitions. Word has length 251 [2018-10-24 16:52:25,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:52:25,232 INFO L481 AbstractCegarLoop]: Abstraction has 12975 states and 14813 transitions. [2018-10-24 16:52:25,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:52:25,232 INFO L276 IsEmpty]: Start isEmpty. Operand 12975 states and 14813 transitions. [2018-10-24 16:52:25,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2018-10-24 16:52:25,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:52:25,242 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, 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, 3, 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] [2018-10-24 16:52:25,243 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:52:25,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:52:25,243 INFO L82 PathProgramCache]: Analyzing trace with hash -208627884, now seen corresponding path program 1 times [2018-10-24 16:52:25,243 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:52:25,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:52:25,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:25,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:52:25,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:52:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 405 proven. 83 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-10-24 16:52:25,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:52:25,882 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 16:52:25,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:52:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:52:25,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:52:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 405 proven. 83 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-10-24 16:52:26,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:52:26,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2018-10-24 16:52:26,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:52:26,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:52:26,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:52:26,184 INFO L87 Difference]: Start difference. First operand 12975 states and 14813 transitions. Second operand 7 states. [2018-10-24 16:52:41,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:52:41,221 INFO L93 Difference]: Finished difference Result 48571 states and 54849 transitions. [2018-10-24 16:52:41,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:52:41,221 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 389 [2018-10-24 16:52:41,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:52:41,275 INFO L225 Difference]: With dead ends: 48571 [2018-10-24 16:52:41,276 INFO L226 Difference]: Without dead ends: 26153 [2018-10-24 16:52:41,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-24 16:52:41,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26153 states. [2018-10-24 16:52:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26153 to 24005. [2018-10-24 16:52:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24005 states. [2018-10-24 16:52:41,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24005 states to 24005 states and 26227 transitions. [2018-10-24 16:52:41,609 INFO L78 Accepts]: Start accepts. Automaton has 24005 states and 26227 transitions. Word has length 389 [2018-10-24 16:52:41,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:52:41,610 INFO L481 AbstractCegarLoop]: Abstraction has 24005 states and 26227 transitions. [2018-10-24 16:52:41,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 16:52:41,610 INFO L276 IsEmpty]: Start isEmpty. Operand 24005 states and 26227 transitions. [2018-10-24 16:52:41,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2018-10-24 16:52:41,624 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:52:41,625 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, 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, 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] [2018-10-24 16:52:41,625 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:52:41,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:52:41,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1689803181, now seen corresponding path program 1 times [2018-10-24 16:52:41,626 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:52:41,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:52:41,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:41,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:52:41,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:52:42,970 WARN L179 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2018-10-24 16:52:43,159 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 310 proven. 83 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-10-24 16:52:43,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:52:43,159 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 16:52:43,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:52:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:52:43,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:52:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 310 proven. 83 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-10-24 16:52:43,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:52:43,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2018-10-24 16:52:43,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 16:52:43,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 16:52:43,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:52:43,700 INFO L87 Difference]: Start difference. First operand 24005 states and 26227 transitions. Second operand 9 states. [2018-10-24 16:52:43,950 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-24 16:52:57,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:52:57,049 INFO L93 Difference]: Finished difference Result 49878 states and 54410 transitions. [2018-10-24 16:52:57,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:52:57,052 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 409 [2018-10-24 16:52:57,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:52:57,096 INFO L225 Difference]: With dead ends: 49878 [2018-10-24 16:52:57,096 INFO L226 Difference]: Without dead ends: 26301 [2018-10-24 16:52:57,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 407 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:52:57,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26301 states. [2018-10-24 16:52:57,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26301 to 26135. [2018-10-24 16:52:57,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26135 states. [2018-10-24 16:52:57,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26135 states to 26135 states and 28426 transitions. [2018-10-24 16:52:57,441 INFO L78 Accepts]: Start accepts. Automaton has 26135 states and 28426 transitions. Word has length 409 [2018-10-24 16:52:57,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:52:57,442 INFO L481 AbstractCegarLoop]: Abstraction has 26135 states and 28426 transitions. [2018-10-24 16:52:57,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 16:52:57,442 INFO L276 IsEmpty]: Start isEmpty. Operand 26135 states and 28426 transitions. [2018-10-24 16:52:57,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2018-10-24 16:52:57,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:52:57,462 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, 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, 3, 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] [2018-10-24 16:52:57,462 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:52:57,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:52:57,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1252882665, now seen corresponding path program 1 times [2018-10-24 16:52:57,463 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:52:57,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:52:57,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:57,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:52:57,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:52:57,997 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 5 [2018-10-24 16:52:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 513 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2018-10-24 16:52:58,219 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:52:58,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:52:58,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:52:58,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:52:58,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:52:58,221 INFO L87 Difference]: Start difference. First operand 26135 states and 28426 transitions. Second operand 4 states. [2018-10-24 16:53:03,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:53:03,737 INFO L93 Difference]: Finished difference Result 71065 states and 77478 transitions. [2018-10-24 16:53:03,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:53:03,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2018-10-24 16:53:03,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:53:03,790 INFO L225 Difference]: With dead ends: 71065 [2018-10-24 16:53:03,791 INFO L226 Difference]: Without dead ends: 45784 [2018-10-24 16:53:03,815 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 16:53:03,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45784 states. [2018-10-24 16:53:04,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45784 to 27400. [2018-10-24 16:53:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27400 states. [2018-10-24 16:53:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27400 states to 27400 states and 29744 transitions. [2018-10-24 16:53:04,202 INFO L78 Accepts]: Start accepts. Automaton has 27400 states and 29744 transitions. Word has length 490 [2018-10-24 16:53:04,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:53:04,203 INFO L481 AbstractCegarLoop]: Abstraction has 27400 states and 29744 transitions. [2018-10-24 16:53:04,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:53:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 27400 states and 29744 transitions. [2018-10-24 16:53:04,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2018-10-24 16:53:04,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:53:04,229 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, 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, 4, 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] [2018-10-24 16:53:04,229 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:53:04,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:53:04,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1944185802, now seen corresponding path program 1 times [2018-10-24 16:53:04,229 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:53:04,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:53:04,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:53:04,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:53:04,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:53:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:53:05,188 WARN L179 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2018-10-24 16:53:05,440 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-10-24 16:53:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 619 proven. 501 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-10-24 16:53:06,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:53:06,133 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 16:53:06,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:53:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:53:06,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:53:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 304 proven. 0 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked. [2018-10-24 16:53:07,047 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:53:07,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2018-10-24 16:53:07,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 16:53:07,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 16:53:07,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-10-24 16:53:07,049 INFO L87 Difference]: Start difference. First operand 27400 states and 29744 transitions. Second operand 10 states. [2018-10-24 16:53:28,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:53:28,885 INFO L93 Difference]: Finished difference Result 72958 states and 79667 transitions. [2018-10-24 16:53:28,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 16:53:28,889 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 596 [2018-10-24 16:53:28,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:53:28,928 INFO L225 Difference]: With dead ends: 72958 [2018-10-24 16:53:28,929 INFO L226 Difference]: Without dead ends: 44701 [2018-10-24 16:53:28,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 603 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2018-10-24 16:53:28,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44701 states. [2018-10-24 16:53:29,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44701 to 37204. [2018-10-24 16:53:29,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37204 states. [2018-10-24 16:53:29,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37204 states to 37204 states and 40189 transitions. [2018-10-24 16:53:29,324 INFO L78 Accepts]: Start accepts. Automaton has 37204 states and 40189 transitions. Word has length 596 [2018-10-24 16:53:29,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:53:29,325 INFO L481 AbstractCegarLoop]: Abstraction has 37204 states and 40189 transitions. [2018-10-24 16:53:29,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 16:53:29,325 INFO L276 IsEmpty]: Start isEmpty. Operand 37204 states and 40189 transitions. [2018-10-24 16:53:29,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1049 [2018-10-24 16:53:29,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:53:29,410 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:53:29,410 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:53:29,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:53:29,411 INFO L82 PathProgramCache]: Analyzing trace with hash -99291151, now seen corresponding path program 1 times [2018-10-24 16:53:29,411 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:53:29,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:53:29,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:53:29,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:53:29,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:53:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:53:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1466 backedges. 883 proven. 0 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2018-10-24 16:53:30,849 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:53:30,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 16:53:30,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:53:30,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:53:30,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:53:30,851 INFO L87 Difference]: Start difference. First operand 37204 states and 40189 transitions. Second operand 5 states. [2018-10-24 16:53:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:53:36,568 INFO L93 Difference]: Finished difference Result 85070 states and 92302 transitions. [2018-10-24 16:53:36,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:53:36,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1048 [2018-10-24 16:53:36,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:53:36,627 INFO L225 Difference]: With dead ends: 85070 [2018-10-24 16:53:36,628 INFO L226 Difference]: Without dead ends: 49999 [2018-10-24 16:53:36,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:53:36,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49999 states. [2018-10-24 16:53:37,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49999 to 37195. [2018-10-24 16:53:37,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37195 states. [2018-10-24 16:53:37,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37195 states to 37195 states and 40295 transitions. [2018-10-24 16:53:37,182 INFO L78 Accepts]: Start accepts. Automaton has 37195 states and 40295 transitions. Word has length 1048 [2018-10-24 16:53:37,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:53:37,184 INFO L481 AbstractCegarLoop]: Abstraction has 37195 states and 40295 transitions. [2018-10-24 16:53:37,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:53:37,184 INFO L276 IsEmpty]: Start isEmpty. Operand 37195 states and 40295 transitions. [2018-10-24 16:53:37,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1129 [2018-10-24 16:53:37,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:53:37,237 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, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:53:37,238 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:53:37,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:53:37,238 INFO L82 PathProgramCache]: Analyzing trace with hash 67492968, now seen corresponding path program 1 times [2018-10-24 16:53:37,238 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:53:37,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:53:37,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:53:37,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:53:37,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:53:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:53:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2535 backedges. 1293 proven. 404 refuted. 0 times theorem prover too weak. 838 trivial. 0 not checked. [2018-10-24 16:53:39,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:53:39,246 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:53:39,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:53:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:53:39,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:53:42,029 WARN L179 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2018-10-24 16:53:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2535 backedges. 1975 proven. 50 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2018-10-24 16:53:44,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:53:44,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2018-10-24 16:53:44,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 16:53:44,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 16:53:44,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-10-24 16:53:44,872 INFO L87 Difference]: Start difference. First operand 37195 states and 40295 transitions. Second operand 10 states. [2018-10-24 16:54:01,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:54:01,218 INFO L93 Difference]: Finished difference Result 78504 states and 84936 transitions. [2018-10-24 16:54:01,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-24 16:54:01,218 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1128 [2018-10-24 16:54:01,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:54:01,263 INFO L225 Difference]: With dead ends: 78504 [2018-10-24 16:54:01,263 INFO L226 Difference]: Without dead ends: 43441 [2018-10-24 16:54:01,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1165 GetRequests, 1139 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2018-10-24 16:54:01,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43441 states. [2018-10-24 16:54:01,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43441 to 37181. [2018-10-24 16:54:01,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37181 states. [2018-10-24 16:54:01,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37181 states to 37181 states and 39124 transitions. [2018-10-24 16:54:01,672 INFO L78 Accepts]: Start accepts. Automaton has 37181 states and 39124 transitions. Word has length 1128 [2018-10-24 16:54:01,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:54:01,673 INFO L481 AbstractCegarLoop]: Abstraction has 37181 states and 39124 transitions. [2018-10-24 16:54:01,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 16:54:01,673 INFO L276 IsEmpty]: Start isEmpty. Operand 37181 states and 39124 transitions. [2018-10-24 16:54:01,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1217 [2018-10-24 16:54:01,705 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:54:01,706 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:54:01,706 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:54:01,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:54:01,707 INFO L82 PathProgramCache]: Analyzing trace with hash -295432022, now seen corresponding path program 1 times [2018-10-24 16:54:01,707 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:54:01,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:54:01,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:01,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:54:01,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:54:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1700 backedges. 990 proven. 0 refuted. 0 times theorem prover too weak. 710 trivial. 0 not checked. [2018-10-24 16:54:03,291 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:54:03,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:54:03,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:54:03,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:54:03,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:54:03,293 INFO L87 Difference]: Start difference. First operand 37181 states and 39124 transitions. Second operand 3 states. [2018-10-24 16:54:07,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:54:07,463 INFO L93 Difference]: Finished difference Result 78193 states and 82403 transitions. [2018-10-24 16:54:07,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:54:07,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1216 [2018-10-24 16:54:07,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:54:07,503 INFO L225 Difference]: With dead ends: 78193 [2018-10-24 16:54:07,503 INFO L226 Difference]: Without dead ends: 41866 [2018-10-24 16:54:07,525 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 [2018-10-24 16:54:07,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41866 states. [2018-10-24 16:54:08,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41866 to 41862. [2018-10-24 16:54:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41862 states. [2018-10-24 16:54:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41862 states to 41862 states and 43950 transitions. [2018-10-24 16:54:08,099 INFO L78 Accepts]: Start accepts. Automaton has 41862 states and 43950 transitions. Word has length 1216 [2018-10-24 16:54:08,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:54:08,100 INFO L481 AbstractCegarLoop]: Abstraction has 41862 states and 43950 transitions. [2018-10-24 16:54:08,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:54:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 41862 states and 43950 transitions. [2018-10-24 16:54:08,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1239 [2018-10-24 16:54:08,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:54:08,145 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:54:08,145 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:54:08,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:54:08,146 INFO L82 PathProgramCache]: Analyzing trace with hash -724557224, now seen corresponding path program 1 times [2018-10-24 16:54:08,146 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:54:08,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:54:08,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:08,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:54:08,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:54:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3265 backedges. 2543 proven. 0 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2018-10-24 16:54:09,558 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:54:09,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 16:54:09,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:54:09,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:54:09,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:54:09,560 INFO L87 Difference]: Start difference. First operand 41862 states and 43950 transitions. Second operand 5 states. [2018-10-24 16:54:16,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:54:16,113 INFO L93 Difference]: Finished difference Result 87555 states and 92175 transitions. [2018-10-24 16:54:16,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:54:16,113 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1238 [2018-10-24 16:54:16,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:54:16,162 INFO L225 Difference]: With dead ends: 87555 [2018-10-24 16:54:16,163 INFO L226 Difference]: Without dead ends: 50384 [2018-10-24 16:54:16,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:54:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50384 states. [2018-10-24 16:54:16,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50384 to 45689. [2018-10-24 16:54:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45689 states. [2018-10-24 16:54:16,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45689 states to 45689 states and 47897 transitions. [2018-10-24 16:54:16,649 INFO L78 Accepts]: Start accepts. Automaton has 45689 states and 47897 transitions. Word has length 1238 [2018-10-24 16:54:16,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:54:16,650 INFO L481 AbstractCegarLoop]: Abstraction has 45689 states and 47897 transitions. [2018-10-24 16:54:16,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:54:16,650 INFO L276 IsEmpty]: Start isEmpty. Operand 45689 states and 47897 transitions. [2018-10-24 16:54:16,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1244 [2018-10-24 16:54:16,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:54:16,685 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:54:16,685 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:54:16,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:54:16,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1842489281, now seen corresponding path program 1 times [2018-10-24 16:54:16,686 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:54:16,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:54:16,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:16,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:54:16,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:54:17,793 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 5 [2018-10-24 16:54:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 2447 proven. 116 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-10-24 16:54:19,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:54:19,441 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:54:19,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:54:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:54:19,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:54:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 1902 proven. 0 refuted. 0 times theorem prover too weak. 1398 trivial. 0 not checked. [2018-10-24 16:54:21,429 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:54:21,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2018-10-24 16:54:21,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:54:21,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:54:21,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:54:21,432 INFO L87 Difference]: Start difference. First operand 45689 states and 47897 transitions. Second operand 7 states. [2018-10-24 16:54:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:54:56,956 INFO L93 Difference]: Finished difference Result 107581 states and 113182 transitions. [2018-10-24 16:54:56,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 16:54:56,957 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1243 [2018-10-24 16:54:56,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:54:57,020 INFO L225 Difference]: With dead ends: 107581 [2018-10-24 16:54:57,020 INFO L226 Difference]: Without dead ends: 62745 [2018-10-24 16:54:57,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1265 GetRequests, 1251 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-10-24 16:54:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62745 states. [2018-10-24 16:54:57,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62745 to 53347. [2018-10-24 16:54:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53347 states. [2018-10-24 16:54:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53347 states to 53347 states and 55535 transitions. [2018-10-24 16:54:57,570 INFO L78 Accepts]: Start accepts. Automaton has 53347 states and 55535 transitions. Word has length 1243 [2018-10-24 16:54:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:54:57,571 INFO L481 AbstractCegarLoop]: Abstraction has 53347 states and 55535 transitions. [2018-10-24 16:54:57,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 16:54:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 53347 states and 55535 transitions. [2018-10-24 16:54:57,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1380 [2018-10-24 16:54:57,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:54:57,610 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:54:57,611 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:54:57,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:54:57,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1084048176, now seen corresponding path program 1 times [2018-10-24 16:54:57,611 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:54:57,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:54:57,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:57,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:54:57,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:55:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1965 backedges. 69 proven. 1813 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-10-24 16:55:00,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:55:00,920 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:55:00,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:55:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:55:01,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:55:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1965 backedges. 1151 proven. 0 refuted. 0 times theorem prover too weak. 814 trivial. 0 not checked. [2018-10-24 16:55:02,939 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:55:02,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2018-10-24 16:55:02,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 16:55:02,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 16:55:02,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2018-10-24 16:55:02,941 INFO L87 Difference]: Start difference. First operand 53347 states and 55535 transitions. Second operand 10 states. Received shutdown request... [2018-10-24 16:55:10,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 16:55:10,512 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:55:10,519 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:55:10,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:55:10 BoogieIcfgContainer [2018-10-24 16:55:10,520 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:55:10,520 INFO L168 Benchmark]: Toolchain (without parser) took 231759.41 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -467.8 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-10-24 16:55:10,522 INFO L168 Benchmark]: CDTParser took 0.23 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. [2018-10-24 16:55:10,522 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1528.93 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: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. [2018-10-24 16:55:10,523 INFO L168 Benchmark]: Boogie Procedure Inliner took 569.69 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 753.9 MB). Free memory was 1.3 GB in the beginning and 2.1 GB in the end (delta: -895.0 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2018-10-24 16:55:10,524 INFO L168 Benchmark]: Boogie Preprocessor took 320.92 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: 59.6 MB). Peak memory consumption was 59.6 MB. Max. memory is 7.1 GB. [2018-10-24 16:55:10,524 INFO L168 Benchmark]: RCFGBuilder took 9821.81 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.6 GB in the end (delta: 463.3 MB). Peak memory consumption was 463.3 MB. Max. memory is 7.1 GB. [2018-10-24 16:55:10,525 INFO L168 Benchmark]: TraceAbstraction took 219512.80 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.6 GB in the beginning and 1.8 GB in the end (delta: -222.6 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-10-24 16:55:10,531 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1528.93 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: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 569.69 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 753.9 MB). Free memory was 1.3 GB in the beginning and 2.1 GB in the end (delta: -895.0 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 320.92 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: 59.6 MB). Peak memory consumption was 59.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9821.81 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.6 GB in the end (delta: 463.3 MB). Peak memory consumption was 463.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 219512.80 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.6 GB in the beginning and 1.8 GB in the end (delta: -222.6 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 194]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 194). Cancelled while BasicCegarLoop was constructing difference of abstraction (53347states) and FLOYD_HOARE automaton (currently 9 states, 10 states before enhancement),while ReachableStatesComputation was computing reachable states (23517 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 591 locations, 1 error locations. TIMEOUT Result, 219.4s OverallTime, 15 OverallIterations, 9 TraceHistogramMax, 182.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5339 SDtfs, 30941 SDslu, 3308 SDs, 0 SdLazy, 77392 SolverSat, 8851 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 158.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5683 GetRequests, 5559 SyntacticMatches, 23 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 9.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53347occurred 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: 4.5s AutomataMinimizationTime, 14 MinimizatonAttempts, 67508 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 20.4s InterpolantComputationTime, 15520 NumberOfCodeBlocks, 15520 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 15497 ConstructedInterpolants, 383 QuantifiedInterpolants, 52901796 SizeOfPredicates, 10 NumberOfNonLiveVariables, 6742 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 23 InterpolantComputations, 12 PerfectInterpolantSequences, 24956/28237 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown