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/Problem12_label52_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 14:05:20,914 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 14:05:20,916 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 14:05:20,930 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 14:05:20,930 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 14:05:20,931 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 14:05:20,933 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 14:05:20,935 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 14:05:20,936 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 14:05:20,937 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 14:05:20,938 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 14:05:20,938 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 14:05:20,939 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 14:05:20,940 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 14:05:20,942 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 14:05:20,942 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 14:05:20,943 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 14:05:20,945 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 14:05:20,947 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 14:05:20,949 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 14:05:20,950 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 14:05:20,951 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 14:05:20,954 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 14:05:20,962 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 14:05:20,982 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 14:05:20,982 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 14:05:20,984 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 14:05:20,985 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 14:05:20,985 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 14:05:20,985 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 14:05:20,986 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 14:05:20,986 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 14:05:20,986 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 14:05:20,986 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 14:05:20,986 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 14:05:20,987 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 14:05:20,987 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 14:05:20,987 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 14:05:20,987 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 14:05:20,987 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 14:05:20,988 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 14:05:20,989 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 14:05:20,989 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 14:05:20,989 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 14:05:20,990 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 14:05:20,990 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 14:05:20,990 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 14:05:20,990 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 14:05:20,990 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 14:05:20,991 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 14:05:20,991 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 14:05:20,991 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 14:05:21,049 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 14:05:21,071 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 14:05:21,075 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 14:05:21,077 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 14:05:21,078 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 14:05:21,078 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label52_false-unreach-call.c [2018-10-24 14:05:21,151 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b5cbeef14/87f57bd1da214ebdaac8ebc770d029fb/FLAGd67a6ea1e [2018-10-24 14:05:21,895 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 14:05:21,896 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label52_false-unreach-call.c [2018-10-24 14:05:21,926 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b5cbeef14/87f57bd1da214ebdaac8ebc770d029fb/FLAGd67a6ea1e [2018-10-24 14:05:21,942 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b5cbeef14/87f57bd1da214ebdaac8ebc770d029fb [2018-10-24 14:05:21,955 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 14:05:21,957 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 14:05:21,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 14:05:21,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 14:05:21,964 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 14:05:21,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:05:21" (1/1) ... [2018-10-24 14:05:21,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@135b0cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:05:21, skipping insertion in model container [2018-10-24 14:05:21,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:05:21" (1/1) ... [2018-10-24 14:05:21,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 14:05:22,144 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 14:05:23,417 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:05:23,422 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 14:05:24,137 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:05:24,173 INFO L193 MainTranslator]: Completed translation [2018-10-24 14:05:24,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:05:24 WrapperNode [2018-10-24 14:05:24,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 14:05:24,175 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 14:05:24,178 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 14:05:24,178 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 14:05:24,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:05:24" (1/1) ... [2018-10-24 14:05:24,251 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:05:24" (1/1) ... [2018-10-24 14:05:24,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 14:05:24,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 14:05:24,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 14:05:24,914 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 14:05:24,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:05:24" (1/1) ... [2018-10-24 14:05:24,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:05:24" (1/1) ... [2018-10-24 14:05:24,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:05:24" (1/1) ... [2018-10-24 14:05:24,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:05:24" (1/1) ... [2018-10-24 14:05:25,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:05:24" (1/1) ... [2018-10-24 14:05:25,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:05:24" (1/1) ... [2018-10-24 14:05:25,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:05:24" (1/1) ... [2018-10-24 14:05:25,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 14:05:25,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 14:05:25,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 14:05:25,367 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 14:05:25,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:05:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 14:05:25,434 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 14:05:25,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 14:05:25,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 14:05:34,337 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 14:05:34,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:05:34 BoogieIcfgContainer [2018-10-24 14:05:34,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 14:05:34,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 14:05:34,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 14:05:34,342 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 14:05:34,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:05:21" (1/3) ... [2018-10-24 14:05:34,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f77e122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:05:34, skipping insertion in model container [2018-10-24 14:05:34,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:05:24" (2/3) ... [2018-10-24 14:05:34,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f77e122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:05:34, skipping insertion in model container [2018-10-24 14:05:34,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:05:34" (3/3) ... [2018-10-24 14:05:34,346 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label52_false-unreach-call.c [2018-10-24 14:05:34,356 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 14:05:34,365 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 14:05:34,379 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 14:05:34,424 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 14:05:34,425 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 14:05:34,425 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 14:05:34,425 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 14:05:34,425 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 14:05:34,425 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 14:05:34,426 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 14:05:34,426 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 14:05:34,426 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 14:05:34,460 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states. [2018-10-24 14:05:34,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-24 14:05:34,471 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:05:34,472 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] [2018-10-24 14:05:34,475 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:05:34,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:05:34,480 INFO L82 PathProgramCache]: Analyzing trace with hash -692138422, now seen corresponding path program 1 times [2018-10-24 14:05:34,482 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:05:34,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:05:34,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:05:34,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:05:34,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:05:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:05:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:05:34,926 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:05:34,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:05:34,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:05:34,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:05:34,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:05:34,951 INFO L87 Difference]: Start difference. First operand 819 states. Second operand 4 states. [2018-10-24 14:05:50,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:05:50,534 INFO L93 Difference]: Finished difference Result 3146 states and 6134 transitions. [2018-10-24 14:05:50,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:05:50,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2018-10-24 14:05:50,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:05:50,578 INFO L225 Difference]: With dead ends: 3146 [2018-10-24 14:05:50,578 INFO L226 Difference]: Without dead ends: 2320 [2018-10-24 14:05:50,586 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 14:05:50,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2018-10-24 14:05:50,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 2320. [2018-10-24 14:05:50,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2320 states. [2018-10-24 14:05:50,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 4229 transitions. [2018-10-24 14:05:50,737 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 4229 transitions. Word has length 31 [2018-10-24 14:05:50,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:05:50,738 INFO L481 AbstractCegarLoop]: Abstraction has 2320 states and 4229 transitions. [2018-10-24 14:05:50,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:05:50,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 4229 transitions. [2018-10-24 14:05:50,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-24 14:05:50,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:05:50,743 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:05:50,744 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:05:50,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:05:50,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1262000804, now seen corresponding path program 1 times [2018-10-24 14:05:50,744 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:05:50,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:05:50,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:05:50,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:05:50,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:05:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:05:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:05:51,029 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:05:51,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:05:51,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:05:51,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:05:51,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:05:51,032 INFO L87 Difference]: Start difference. First operand 2320 states and 4229 transitions. Second operand 4 states. [2018-10-24 14:06:03,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:06:03,596 INFO L93 Difference]: Finished difference Result 9150 states and 16788 transitions. [2018-10-24 14:06:03,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:06:03,596 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2018-10-24 14:06:03,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:06:03,635 INFO L225 Difference]: With dead ends: 9150 [2018-10-24 14:06:03,635 INFO L226 Difference]: Without dead ends: 6832 [2018-10-24 14:06:03,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:06:03,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2018-10-24 14:06:03,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 6832. [2018-10-24 14:06:03,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6832 states. [2018-10-24 14:06:03,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6832 states to 6832 states and 10629 transitions. [2018-10-24 14:06:03,754 INFO L78 Accepts]: Start accepts. Automaton has 6832 states and 10629 transitions. Word has length 107 [2018-10-24 14:06:03,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:06:03,754 INFO L481 AbstractCegarLoop]: Abstraction has 6832 states and 10629 transitions. [2018-10-24 14:06:03,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:06:03,755 INFO L276 IsEmpty]: Start isEmpty. Operand 6832 states and 10629 transitions. [2018-10-24 14:06:03,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-24 14:06:03,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:06:03,764 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:06:03,764 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:06:03,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:06:03,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1551836813, now seen corresponding path program 1 times [2018-10-24 14:06:03,765 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:06:03,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:06:03,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:06:03,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:06:03,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:06:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:06:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:06:03,990 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:06:03,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:06:03,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:06:03,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:06:03,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:06:03,991 INFO L87 Difference]: Start difference. First operand 6832 states and 10629 transitions. Second operand 4 states. [2018-10-24 14:06:12,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:06:12,681 INFO L93 Difference]: Finished difference Result 27260 states and 42449 transitions. [2018-10-24 14:06:12,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:06:12,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2018-10-24 14:06:12,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:06:12,762 INFO L225 Difference]: With dead ends: 27260 [2018-10-24 14:06:12,762 INFO L226 Difference]: Without dead ends: 20430 [2018-10-24 14:06:12,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:06:12,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20430 states. [2018-10-24 14:06:13,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20430 to 13600. [2018-10-24 14:06:13,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13600 states. [2018-10-24 14:06:13,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13600 states to 13600 states and 19341 transitions. [2018-10-24 14:06:13,130 INFO L78 Accepts]: Start accepts. Automaton has 13600 states and 19341 transitions. Word has length 113 [2018-10-24 14:06:13,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:06:13,131 INFO L481 AbstractCegarLoop]: Abstraction has 13600 states and 19341 transitions. [2018-10-24 14:06:13,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:06:13,131 INFO L276 IsEmpty]: Start isEmpty. Operand 13600 states and 19341 transitions. [2018-10-24 14:06:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-24 14:06:13,134 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:06:13,134 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:06:13,135 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:06:13,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:06:13,139 INFO L82 PathProgramCache]: Analyzing trace with hash 311184864, now seen corresponding path program 1 times [2018-10-24 14:06:13,139 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:06:13,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:06:13,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:06:13,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:06:13,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:06:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:06:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:06:13,454 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:06:13,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:06:13,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:06:13,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:06:13,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:06:13,455 INFO L87 Difference]: Start difference. First operand 13600 states and 19341 transitions. Second operand 4 states. [2018-10-24 14:06:22,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:06:22,921 INFO L93 Difference]: Finished difference Result 52782 states and 74748 transitions. [2018-10-24 14:06:22,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:06:22,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2018-10-24 14:06:22,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:06:22,994 INFO L225 Difference]: With dead ends: 52782 [2018-10-24 14:06:22,994 INFO L226 Difference]: Without dead ends: 39184 [2018-10-24 14:06:23,011 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 14:06:23,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39184 states. [2018-10-24 14:06:23,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39184 to 26384. [2018-10-24 14:06:23,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26384 states. [2018-10-24 14:06:23,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26384 states to 26384 states and 33902 transitions. [2018-10-24 14:06:23,556 INFO L78 Accepts]: Start accepts. Automaton has 26384 states and 33902 transitions. Word has length 131 [2018-10-24 14:06:23,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:06:23,558 INFO L481 AbstractCegarLoop]: Abstraction has 26384 states and 33902 transitions. [2018-10-24 14:06:23,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:06:23,558 INFO L276 IsEmpty]: Start isEmpty. Operand 26384 states and 33902 transitions. [2018-10-24 14:06:23,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-24 14:06:23,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:06:23,561 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:06:23,561 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:06:23,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:06:23,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1367918199, now seen corresponding path program 1 times [2018-10-24 14:06:23,562 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:06:23,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:06:23,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:06:23,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:06:23,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:06:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:06:23,894 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 14:06:24,160 WARN L179 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-10-24 14:06:24,444 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2018-10-24 14:06:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-24 14:06:24,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:06:24,505 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:06:24,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:06:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:06:24,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:06:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-10-24 14:06:24,755 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:06:24,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2018-10-24 14:06:24,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 14:06:24,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 14:06:24,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-10-24 14:06:24,756 INFO L87 Difference]: Start difference. First operand 26384 states and 33902 transitions. Second operand 8 states. [2018-10-24 14:06:45,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:06:45,449 INFO L93 Difference]: Finished difference Result 100144 states and 128565 transitions. [2018-10-24 14:06:45,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 14:06:45,449 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 173 [2018-10-24 14:06:45,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:06:45,589 INFO L225 Difference]: With dead ends: 100144 [2018-10-24 14:06:45,589 INFO L226 Difference]: Without dead ends: 73762 [2018-10-24 14:06:45,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2018-10-24 14:06:45,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73762 states. [2018-10-24 14:06:46,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73762 to 70752. [2018-10-24 14:06:46,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70752 states. [2018-10-24 14:06:46,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70752 states to 70752 states and 86216 transitions. [2018-10-24 14:06:46,655 INFO L78 Accepts]: Start accepts. Automaton has 70752 states and 86216 transitions. Word has length 173 [2018-10-24 14:06:46,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:06:46,656 INFO L481 AbstractCegarLoop]: Abstraction has 70752 states and 86216 transitions. [2018-10-24 14:06:46,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 14:06:46,656 INFO L276 IsEmpty]: Start isEmpty. Operand 70752 states and 86216 transitions. [2018-10-24 14:06:46,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-10-24 14:06:46,667 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:06:46,668 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:06:46,668 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:06:46,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:06:46,668 INFO L82 PathProgramCache]: Analyzing trace with hash -494094147, now seen corresponding path program 1 times [2018-10-24 14:06:46,669 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:06:46,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:06:46,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:06:46,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:06:46,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:06:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:06:47,211 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:06:47,212 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:06:47,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:06:47,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:06:47,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:06:47,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:06:47,214 INFO L87 Difference]: Start difference. First operand 70752 states and 86216 transitions. Second operand 4 states. [2018-10-24 14:06:57,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:06:57,641 INFO L93 Difference]: Finished difference Result 143006 states and 174099 transitions. [2018-10-24 14:06:57,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:06:57,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 285 [2018-10-24 14:06:57,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:06:57,744 INFO L225 Difference]: With dead ends: 143006 [2018-10-24 14:06:57,744 INFO L226 Difference]: Without dead ends: 73008 [2018-10-24 14:06:57,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:06:57,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73008 states. [2018-10-24 14:06:58,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73008 to 71504. [2018-10-24 14:06:58,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71504 states. [2018-10-24 14:06:58,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71504 states to 71504 states and 84977 transitions. [2018-10-24 14:06:58,643 INFO L78 Accepts]: Start accepts. Automaton has 71504 states and 84977 transitions. Word has length 285 [2018-10-24 14:06:58,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:06:58,643 INFO L481 AbstractCegarLoop]: Abstraction has 71504 states and 84977 transitions. [2018-10-24 14:06:58,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:06:58,644 INFO L276 IsEmpty]: Start isEmpty. Operand 71504 states and 84977 transitions. [2018-10-24 14:06:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-10-24 14:06:58,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:06:58,656 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:06:58,656 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:06:58,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:06:58,657 INFO L82 PathProgramCache]: Analyzing trace with hash 531043655, now seen corresponding path program 1 times [2018-10-24 14:06:58,657 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:06:58,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:06:58,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:06:58,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:06:58,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:06:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:06:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-10-24 14:06:58,990 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:06:58,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:06:58,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:06:58,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:06:58,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:06:58,992 INFO L87 Difference]: Start difference. First operand 71504 states and 84977 transitions. Second operand 4 states. [2018-10-24 14:07:08,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:07:08,728 INFO L93 Difference]: Finished difference Result 143006 states and 170021 transitions. [2018-10-24 14:07:08,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:07:08,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 289 [2018-10-24 14:07:08,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:07:08,799 INFO L225 Difference]: With dead ends: 143006 [2018-10-24 14:07:08,799 INFO L226 Difference]: Without dead ends: 72256 [2018-10-24 14:07:08,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:07:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72256 states. [2018-10-24 14:07:09,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72256 to 70000. [2018-10-24 14:07:09,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70000 states. [2018-10-24 14:07:09,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70000 states to 70000 states and 77595 transitions. [2018-10-24 14:07:09,560 INFO L78 Accepts]: Start accepts. Automaton has 70000 states and 77595 transitions. Word has length 289 [2018-10-24 14:07:09,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:07:09,560 INFO L481 AbstractCegarLoop]: Abstraction has 70000 states and 77595 transitions. [2018-10-24 14:07:09,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:07:09,561 INFO L276 IsEmpty]: Start isEmpty. Operand 70000 states and 77595 transitions. [2018-10-24 14:07:09,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-10-24 14:07:09,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:07:09,570 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:07:09,571 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:07:09,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:07:09,571 INFO L82 PathProgramCache]: Analyzing trace with hash 775536557, now seen corresponding path program 1 times [2018-10-24 14:07:09,571 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:07:09,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:07:09,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:07:09,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:07:09,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:07:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:07:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 229 proven. 5 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-10-24 14:07:09,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:07:09,922 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:07:09,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:07:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:07:10,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:07:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2018-10-24 14:07:10,180 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:07:10,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-24 14:07:10,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 14:07:10,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 14:07:10,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:07:10,182 INFO L87 Difference]: Start difference. First operand 70000 states and 77595 transitions. Second operand 7 states. [2018-10-24 14:07:32,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:07:32,153 INFO L93 Difference]: Finished difference Result 167092 states and 184153 transitions. [2018-10-24 14:07:32,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 14:07:32,153 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 290 [2018-10-24 14:07:32,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:07:32,248 INFO L225 Difference]: With dead ends: 167092 [2018-10-24 14:07:32,248 INFO L226 Difference]: Without dead ends: 95587 [2018-10-24 14:07:32,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 291 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 14:07:32,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95587 states. [2018-10-24 14:07:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95587 to 72255. [2018-10-24 14:07:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72255 states. [2018-10-24 14:07:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72255 states to 72255 states and 76465 transitions. [2018-10-24 14:07:33,360 INFO L78 Accepts]: Start accepts. Automaton has 72255 states and 76465 transitions. Word has length 290 [2018-10-24 14:07:33,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:07:33,360 INFO L481 AbstractCegarLoop]: Abstraction has 72255 states and 76465 transitions. [2018-10-24 14:07:33,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 14:07:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand 72255 states and 76465 transitions. [2018-10-24 14:07:33,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1002 [2018-10-24 14:07:33,482 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:07:33,483 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:07:33,483 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:07:33,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:07:33,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1382165509, now seen corresponding path program 1 times [2018-10-24 14:07:33,484 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:07:33,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:07:33,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:07:33,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:07:33,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:07:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:07:34,528 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 699 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2018-10-24 14:07:34,528 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:07:34,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:07:34,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:07:34,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:07:34,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:07:34,530 INFO L87 Difference]: Start difference. First operand 72255 states and 76465 transitions. Second operand 3 states. [2018-10-24 14:07:39,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:07:39,894 INFO L93 Difference]: Finished difference Result 154282 states and 164083 transitions. [2018-10-24 14:07:39,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:07:39,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1001 [2018-10-24 14:07:39,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:07:39,978 INFO L225 Difference]: With dead ends: 154282 [2018-10-24 14:07:39,978 INFO L226 Difference]: Without dead ends: 82781 [2018-10-24 14:07:40,009 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 14:07:40,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82781 states. [2018-10-24 14:07:40,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82781 to 82781. [2018-10-24 14:07:40,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82781 states. [2018-10-24 14:07:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82781 states to 82781 states and 87992 transitions. [2018-10-24 14:07:40,669 INFO L78 Accepts]: Start accepts. Automaton has 82781 states and 87992 transitions. Word has length 1001 [2018-10-24 14:07:40,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:07:40,670 INFO L481 AbstractCegarLoop]: Abstraction has 82781 states and 87992 transitions. [2018-10-24 14:07:40,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:07:40,671 INFO L276 IsEmpty]: Start isEmpty. Operand 82781 states and 87992 transitions. [2018-10-24 14:07:40,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1011 [2018-10-24 14:07:40,724 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:07:40,725 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:07:40,725 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:07:40,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:07:40,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1263413918, now seen corresponding path program 1 times [2018-10-24 14:07:40,726 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:07:40,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:07:40,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:07:40,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:07:40,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:07:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:07:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 717 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-10-24 14:07:42,195 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:07:42,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:07:42,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:07:42,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:07:42,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:07:42,197 INFO L87 Difference]: Start difference. First operand 82781 states and 87992 transitions. Second operand 4 states. [2018-10-24 14:07:49,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:07:49,642 INFO L93 Difference]: Finished difference Result 165559 states and 175988 transitions. [2018-10-24 14:07:49,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:07:49,643 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1010 [2018-10-24 14:07:49,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:07:49,747 INFO L225 Difference]: With dead ends: 165559 [2018-10-24 14:07:49,748 INFO L226 Difference]: Without dead ends: 79764 [2018-10-24 14:07:49,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:07:49,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79764 states. [2018-10-24 14:07:50,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79764 to 75252. [2018-10-24 14:07:50,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75252 states. [2018-10-24 14:07:50,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75252 states to 75252 states and 77981 transitions. [2018-10-24 14:07:50,675 INFO L78 Accepts]: Start accepts. Automaton has 75252 states and 77981 transitions. Word has length 1010 [2018-10-24 14:07:50,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:07:50,676 INFO L481 AbstractCegarLoop]: Abstraction has 75252 states and 77981 transitions. [2018-10-24 14:07:50,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:07:50,677 INFO L276 IsEmpty]: Start isEmpty. Operand 75252 states and 77981 transitions. [2018-10-24 14:07:50,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1037 [2018-10-24 14:07:50,738 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:07:50,739 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:07:50,740 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:07:50,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:07:50,740 INFO L82 PathProgramCache]: Analyzing trace with hash 631280039, now seen corresponding path program 1 times [2018-10-24 14:07:50,741 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:07:50,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:07:50,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:07:50,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:07:50,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:07:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:07:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 531 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-10-24 14:07:52,762 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:07:52,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:07:52,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:07:52,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:07:52,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:07:52,763 INFO L87 Difference]: Start difference. First operand 75252 states and 77981 transitions. Second operand 4 states. [2018-10-24 14:08:00,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:08:00,437 INFO L93 Difference]: Finished difference Result 154262 states and 159806 transitions. [2018-10-24 14:08:00,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:08:00,438 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1036 [2018-10-24 14:08:00,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:08:00,535 INFO L225 Difference]: With dead ends: 154262 [2018-10-24 14:08:00,536 INFO L226 Difference]: Without dead ends: 79764 [2018-10-24 14:08:00,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:08:00,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79764 states. [2018-10-24 14:08:01,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79764 to 75252. [2018-10-24 14:08:01,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75252 states. [2018-10-24 14:08:01,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75252 states to 75252 states and 77745 transitions. [2018-10-24 14:08:01,168 INFO L78 Accepts]: Start accepts. Automaton has 75252 states and 77745 transitions. Word has length 1036 [2018-10-24 14:08:01,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:08:01,169 INFO L481 AbstractCegarLoop]: Abstraction has 75252 states and 77745 transitions. [2018-10-24 14:08:01,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:08:01,169 INFO L276 IsEmpty]: Start isEmpty. Operand 75252 states and 77745 transitions. [2018-10-24 14:08:01,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1049 [2018-10-24 14:08:01,216 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:08:01,217 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:08:01,217 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:08:01,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:08:01,218 INFO L82 PathProgramCache]: Analyzing trace with hash -2065705667, now seen corresponding path program 1 times [2018-10-24 14:08:01,218 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:08:01,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:08:01,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:08:01,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:08:01,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:08:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:08:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 517 proven. 70 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-24 14:08:03,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:08:03,048 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:08:03,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:08:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:08:03,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:08:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 517 proven. 70 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-24 14:08:05,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:08:05,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-10-24 14:08:05,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 14:08:05,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 14:08:05,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-24 14:08:05,127 INFO L87 Difference]: Start difference. First operand 75252 states and 77745 transitions. Second operand 6 states. [2018-10-24 14:08:23,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:08:23,371 INFO L93 Difference]: Finished difference Result 198637 states and 205527 transitions. [2018-10-24 14:08:23,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 14:08:23,371 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1048 [2018-10-24 14:08:23,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:08:23,502 INFO L225 Difference]: With dead ends: 198637 [2018-10-24 14:08:23,502 INFO L226 Difference]: Without dead ends: 123386 [2018-10-24 14:08:23,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1056 GetRequests, 1049 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-24 14:08:23,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123386 states. [2018-10-24 14:08:24,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123386 to 105331. [2018-10-24 14:08:24,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105331 states. [2018-10-24 14:08:24,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105331 states to 105331 states and 108420 transitions. [2018-10-24 14:08:24,385 INFO L78 Accepts]: Start accepts. Automaton has 105331 states and 108420 transitions. Word has length 1048 [2018-10-24 14:08:24,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:08:24,386 INFO L481 AbstractCegarLoop]: Abstraction has 105331 states and 108420 transitions. [2018-10-24 14:08:24,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 14:08:24,386 INFO L276 IsEmpty]: Start isEmpty. Operand 105331 states and 108420 transitions. [2018-10-24 14:08:24,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1131 [2018-10-24 14:08:24,429 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:08:24,430 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:08:24,430 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:08:24,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:08:24,431 INFO L82 PathProgramCache]: Analyzing trace with hash 752005048, now seen corresponding path program 1 times [2018-10-24 14:08:24,431 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:08:24,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:08:24,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:08:24,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:08:24,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:08:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:08:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2018-10-24 14:08:25,786 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:08:25,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:08:25,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:08:25,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:08:25,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:08:25,787 INFO L87 Difference]: Start difference. First operand 105331 states and 108420 transitions. Second operand 3 states. [2018-10-24 14:08:33,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:08:33,033 INFO L93 Difference]: Finished difference Result 238484 states and 245725 transitions. [2018-10-24 14:08:33,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:08:33,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1130 [2018-10-24 14:08:33,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:08:33,179 INFO L225 Difference]: With dead ends: 238484 [2018-10-24 14:08:33,179 INFO L226 Difference]: Without dead ends: 133154 [2018-10-24 14:08:33,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 14:08:33,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133154 states. [2018-10-24 14:08:34,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133154 to 129394. [2018-10-24 14:08:34,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129394 states. [2018-10-24 14:08:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129394 states to 129394 states and 133180 transitions. [2018-10-24 14:08:34,313 INFO L78 Accepts]: Start accepts. Automaton has 129394 states and 133180 transitions. Word has length 1130 [2018-10-24 14:08:34,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:08:34,314 INFO L481 AbstractCegarLoop]: Abstraction has 129394 states and 133180 transitions. [2018-10-24 14:08:34,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:08:34,314 INFO L276 IsEmpty]: Start isEmpty. Operand 129394 states and 133180 transitions. [2018-10-24 14:08:34,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1366 [2018-10-24 14:08:34,413 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:08:34,414 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:08:34,414 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:08:34,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:08:34,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1458799035, now seen corresponding path program 1 times [2018-10-24 14:08:34,415 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:08:34,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:08:34,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:08:34,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:08:34,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:08:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:08:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1623 backedges. 1262 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-10-24 14:08:35,890 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:08:35,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:08:35,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:08:35,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:08:35,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:08:35,893 INFO L87 Difference]: Start difference. First operand 129394 states and 133180 transitions. Second operand 4 states. [2018-10-24 14:08:43,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:08:43,210 INFO L93 Difference]: Finished difference Result 302401 states and 312148 transitions. [2018-10-24 14:08:43,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:08:43,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1365 [2018-10-24 14:08:43,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:08:43,400 INFO L225 Difference]: With dead ends: 302401 [2018-10-24 14:08:43,401 INFO L226 Difference]: Without dead ends: 173761 [2018-10-24 14:08:43,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:08:43,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173761 states. [2018-10-24 14:08:45,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173761 to 170001. [2018-10-24 14:08:45,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170001 states. [2018-10-24 14:08:45,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170001 states to 170001 states and 174595 transitions. [2018-10-24 14:08:45,523 INFO L78 Accepts]: Start accepts. Automaton has 170001 states and 174595 transitions. Word has length 1365 [2018-10-24 14:08:45,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:08:45,523 INFO L481 AbstractCegarLoop]: Abstraction has 170001 states and 174595 transitions. [2018-10-24 14:08:45,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:08:45,524 INFO L276 IsEmpty]: Start isEmpty. Operand 170001 states and 174595 transitions. [2018-10-24 14:08:45,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1424 [2018-10-24 14:08:45,629 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:08:45,630 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:08:45,630 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:08:45,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:08:45,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2146172628, now seen corresponding path program 1 times [2018-10-24 14:08:45,631 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:08:45,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:08:45,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:08:45,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:08:45,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:08:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:08:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 911 proven. 262 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-24 14:08:51,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:08:51,922 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:08:51,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:08:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:08:52,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:08:53,052 WARN L179 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 31 [2018-10-24 14:08:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 1056 proven. 117 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-24 14:08:59,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:08:59,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2018-10-24 14:08:59,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 14:08:59,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 14:08:59,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-10-24 14:08:59,137 INFO L87 Difference]: Start difference. First operand 170001 states and 174595 transitions. Second operand 8 states. Received shutdown request... [2018-10-24 14:09:11,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 14:09:11,852 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 14:09:11,860 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 14:09:11,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:09:11 BoogieIcfgContainer [2018-10-24 14:09:11,861 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 14:09:11,862 INFO L168 Benchmark]: Toolchain (without parser) took 229906.20 ms. Allocated memory was 1.5 GB in the beginning and 4.7 GB in the end (delta: 3.2 GB). Free memory was 1.4 GB in the beginning and 3.4 GB in the end (delta: -2.0 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-24 14:09:11,863 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 14:09:11,863 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2215.86 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. [2018-10-24 14:09:11,864 INFO L168 Benchmark]: Boogie Procedure Inliner took 738.40 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 784.9 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -972.4 MB). Peak memory consumption was 68.9 MB. Max. memory is 7.1 GB. [2018-10-24 14:09:11,865 INFO L168 Benchmark]: Boogie Preprocessor took 452.53 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 38.4 MB). Peak memory consumption was 38.4 MB. Max. memory is 7.1 GB. [2018-10-24 14:09:11,866 INFO L168 Benchmark]: RCFGBuilder took 8972.01 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 268.4 MB). Free memory was 2.1 GB in the beginning and 2.4 GB in the end (delta: -261.5 MB). Peak memory consumption was 679.5 MB. Max. memory is 7.1 GB. [2018-10-24 14:09:11,867 INFO L168 Benchmark]: TraceAbstraction took 217521.89 ms. Allocated memory was 2.6 GB in the beginning and 4.7 GB in the end (delta: 2.1 GB). Free memory was 2.4 GB in the beginning and 3.4 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-10-24 14:09:11,872 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 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2215.86 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 738.40 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 784.9 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -972.4 MB). Peak memory consumption was 68.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 452.53 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 38.4 MB). Peak memory consumption was 38.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8972.01 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 268.4 MB). Free memory was 2.1 GB in the beginning and 2.4 GB in the end (delta: -261.5 MB). Peak memory consumption was 679.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 217521.89 ms. Allocated memory was 2.6 GB in the beginning and 4.7 GB in the end (delta: 2.1 GB). Free memory was 2.4 GB in the beginning and 3.4 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 102). Cancelled while BasicCegarLoop was constructing difference of abstraction (170001states) and FLOYD_HOARE automaton (currently 9 states, 8 states before enhancement),while ReachableStatesComputation was computing reachable states (26127 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 819 locations, 1 error locations. TIMEOUT Result, 217.4s OverallTime, 15 OverallIterations, 6 TraceHistogramMax, 177.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 9567 SDtfs, 35554 SDslu, 1606 SDs, 0 SdLazy, 90223 SolverSat, 16071 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 144.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3012 GetRequests, 2951 SyntacticMatches, 11 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=170001occurred 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: 10.9s AutomataMinimizationTime, 14 MinimizatonAttempts, 84331 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 15.7s InterpolantComputationTime, 12366 NumberOfCodeBlocks, 12366 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 12347 ConstructedInterpolants, 444 QuantifiedInterpolants, 54192386 SizeOfPredicates, 2 NumberOfNonLiveVariables, 3459 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 19 InterpolantComputations, 13 PerfectInterpolantSequences, 9408/9938 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown