java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label22_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 14:23:56,395 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 14:23:56,397 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 14:23:56,416 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 14:23:56,417 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 14:23:56,418 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 14:23:56,419 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 14:23:56,421 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 14:23:56,423 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 14:23:56,423 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 14:23:56,424 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 14:23:56,425 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 14:23:56,426 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 14:23:56,427 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 14:23:56,428 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 14:23:56,429 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 14:23:56,430 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 14:23:56,432 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 14:23:56,434 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 14:23:56,435 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 14:23:56,436 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 14:23:56,438 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 14:23:56,440 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 14:23:56,450 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 14:23:56,471 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 14:23:56,471 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 14:23:56,472 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 14:23:56,472 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 14:23:56,473 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 14:23:56,473 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 14:23:56,473 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 14:23:56,473 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 14:23:56,474 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 14:23:56,475 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 14:23:56,475 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 14:23:56,475 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 14:23:56,476 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 14:23:56,476 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 14:23:56,476 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 14:23:56,476 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 14:23:56,476 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 14:23:56,477 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 14:23:56,477 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 14:23:56,477 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 14:23:56,477 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 14:23:56,477 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 14:23:56,477 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 14:23:56,478 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 14:23:56,478 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 14:23:56,478 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 14:23:56,478 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 14:23:56,478 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 14:23:56,534 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 14:23:56,551 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 14:23:56,556 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 14:23:56,557 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 14:23:56,558 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 14:23:56,558 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label22_false-unreach-call.c [2018-10-24 14:23:56,621 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f14814e8e/c7c8da9068d948bead561df4a42f8079/FLAGc936a35c9 [2018-10-24 14:23:57,294 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 14:23:57,295 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label22_false-unreach-call.c [2018-10-24 14:23:57,314 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f14814e8e/c7c8da9068d948bead561df4a42f8079/FLAGc936a35c9 [2018-10-24 14:23:57,329 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f14814e8e/c7c8da9068d948bead561df4a42f8079 [2018-10-24 14:23:57,339 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 14:23:57,340 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 14:23:57,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 14:23:57,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 14:23:57,345 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 14:23:57,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:23:57" (1/1) ... [2018-10-24 14:23:57,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14b692d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:57, skipping insertion in model container [2018-10-24 14:23:57,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:23:57" (1/1) ... [2018-10-24 14:23:57,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 14:23:57,440 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 14:23:58,107 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:23:58,111 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 14:23:58,420 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:23:58,442 INFO L193 MainTranslator]: Completed translation [2018-10-24 14:23:58,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:58 WrapperNode [2018-10-24 14:23:58,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 14:23:58,444 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 14:23:58,444 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 14:23:58,444 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 14:23:58,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:58" (1/1) ... [2018-10-24 14:23:58,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:58" (1/1) ... [2018-10-24 14:23:58,801 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 14:23:58,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 14:23:58,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 14:23:58,802 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 14:23:58,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:58" (1/1) ... [2018-10-24 14:23:58,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:58" (1/1) ... [2018-10-24 14:23:58,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:58" (1/1) ... [2018-10-24 14:23:58,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:58" (1/1) ... [2018-10-24 14:23:58,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:58" (1/1) ... [2018-10-24 14:23:58,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:58" (1/1) ... [2018-10-24 14:23:58,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:58" (1/1) ... [2018-10-24 14:23:58,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 14:23:58,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 14:23:58,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 14:23:58,983 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 14:23:58,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:58" (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 14:23:59,048 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 14:23:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 14:23:59,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 14:24:05,983 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 14:24:05,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:24:05 BoogieIcfgContainer [2018-10-24 14:24:05,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 14:24:05,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 14:24:05,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 14:24:05,994 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 14:24:05,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:23:57" (1/3) ... [2018-10-24 14:24:05,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ddd9998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:24:05, skipping insertion in model container [2018-10-24 14:24:05,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:58" (2/3) ... [2018-10-24 14:24:05,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ddd9998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:24:05, skipping insertion in model container [2018-10-24 14:24:05,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:24:05" (3/3) ... [2018-10-24 14:24:05,998 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label22_false-unreach-call.c [2018-10-24 14:24:06,008 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 14:24:06,021 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 14:24:06,039 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 14:24:06,079 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 14:24:06,080 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 14:24:06,081 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 14:24:06,081 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 14:24:06,081 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 14:24:06,081 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 14:24:06,082 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 14:24:06,082 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 14:24:06,082 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 14:24:06,109 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states. [2018-10-24 14:24:06,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-24 14:24:06,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:24:06,118 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:24:06,120 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:24:06,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:24:06,127 INFO L82 PathProgramCache]: Analyzing trace with hash 340357962, now seen corresponding path program 1 times [2018-10-24 14:24:06,129 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:24:06,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:24:06,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:06,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:06,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:06,501 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-10-24 14:24:06,506 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 14:24:06,509 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:24:06,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:24:06,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:24:06,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:24:06,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:24:06,535 INFO L87 Difference]: Start difference. First operand 397 states. Second operand 4 states. [2018-10-24 14:24:13,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:24:13,830 INFO L93 Difference]: Finished difference Result 1473 states and 2781 transitions. [2018-10-24 14:24:13,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:24:13,832 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-10-24 14:24:13,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:24:13,863 INFO L225 Difference]: With dead ends: 1473 [2018-10-24 14:24:13,864 INFO L226 Difference]: Without dead ends: 1069 [2018-10-24 14:24:13,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:24:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2018-10-24 14:24:13,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1069. [2018-10-24 14:24:13,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1069 states. [2018-10-24 14:24:13,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1914 transitions. [2018-10-24 14:24:13,977 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1914 transitions. Word has length 14 [2018-10-24 14:24:13,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:24:13,977 INFO L481 AbstractCegarLoop]: Abstraction has 1069 states and 1914 transitions. [2018-10-24 14:24:13,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:24:13,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1914 transitions. [2018-10-24 14:24:13,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-24 14:24:13,981 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:24:13,981 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:24:13,982 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:24:13,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:24:13,982 INFO L82 PathProgramCache]: Analyzing trace with hash 549376810, now seen corresponding path program 1 times [2018-10-24 14:24:13,982 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:24:13,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:24:13,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:13,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:13,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:24:14,221 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:24:14,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:24:14,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:24:14,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:24:14,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:24:14,224 INFO L87 Difference]: Start difference. First operand 1069 states and 1914 transitions. Second operand 4 states. [2018-10-24 14:24:19,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:24:19,303 INFO L93 Difference]: Finished difference Result 4116 states and 7498 transitions. [2018-10-24 14:24:19,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:24:19,303 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2018-10-24 14:24:19,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:24:19,321 INFO L225 Difference]: With dead ends: 4116 [2018-10-24 14:24:19,321 INFO L226 Difference]: Without dead ends: 3049 [2018-10-24 14:24:19,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:24:19,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2018-10-24 14:24:19,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 3049. [2018-10-24 14:24:19,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3049 states. [2018-10-24 14:24:19,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3049 states to 3049 states and 4881 transitions. [2018-10-24 14:24:19,424 INFO L78 Accepts]: Start accepts. Automaton has 3049 states and 4881 transitions. Word has length 81 [2018-10-24 14:24:19,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:24:19,424 INFO L481 AbstractCegarLoop]: Abstraction has 3049 states and 4881 transitions. [2018-10-24 14:24:19,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:24:19,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3049 states and 4881 transitions. [2018-10-24 14:24:19,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-24 14:24:19,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:24:19,434 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:24:19,434 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:24:19,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:24:19,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1240645888, now seen corresponding path program 1 times [2018-10-24 14:24:19,436 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:24:19,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:24:19,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:19,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:19,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:20,056 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2018-10-24 14:24:20,320 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2018-10-24 14:24:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:24:20,409 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:24:20,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 14:24:20,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 14:24:20,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 14:24:20,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:24:20,411 INFO L87 Difference]: Start difference. First operand 3049 states and 4881 transitions. Second operand 7 states. [2018-10-24 14:24:28,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:24:28,775 INFO L93 Difference]: Finished difference Result 9395 states and 14329 transitions. [2018-10-24 14:24:28,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 14:24:28,776 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 149 [2018-10-24 14:24:28,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:24:28,809 INFO L225 Difference]: With dead ends: 9395 [2018-10-24 14:24:28,810 INFO L226 Difference]: Without dead ends: 6348 [2018-10-24 14:24:28,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-10-24 14:24:28,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6348 states. [2018-10-24 14:24:28,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6348 to 6016. [2018-10-24 14:24:28,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6016 states. [2018-10-24 14:24:28,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6016 states to 6016 states and 8749 transitions. [2018-10-24 14:24:28,937 INFO L78 Accepts]: Start accepts. Automaton has 6016 states and 8749 transitions. Word has length 149 [2018-10-24 14:24:28,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:24:28,938 INFO L481 AbstractCegarLoop]: Abstraction has 6016 states and 8749 transitions. [2018-10-24 14:24:28,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 14:24:28,938 INFO L276 IsEmpty]: Start isEmpty. Operand 6016 states and 8749 transitions. [2018-10-24 14:24:28,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-10-24 14:24:28,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:24:28,947 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2018-10-24 14:24:28,947 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:24:28,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:24:28,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1900838013, now seen corresponding path program 1 times [2018-10-24 14:24:28,948 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:24:28,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:24:28,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:28,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:28,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:29,356 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 14:24:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-24 14:24:29,650 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:24:29,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 14:24:29,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 14:24:29,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 14:24:29,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:24:29,651 INFO L87 Difference]: Start difference. First operand 6016 states and 8749 transitions. Second operand 7 states. [2018-10-24 14:24:36,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:24:36,036 INFO L93 Difference]: Finished difference Result 12419 states and 17899 transitions. [2018-10-24 14:24:36,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:24:36,037 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 241 [2018-10-24 14:24:36,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:24:36,066 INFO L225 Difference]: With dead ends: 12419 [2018-10-24 14:24:36,066 INFO L226 Difference]: Without dead ends: 6405 [2018-10-24 14:24:36,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-24 14:24:36,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6405 states. [2018-10-24 14:24:36,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6405 to 6346. [2018-10-24 14:24:36,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6346 states. [2018-10-24 14:24:36,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6346 states to 6346 states and 9085 transitions. [2018-10-24 14:24:36,200 INFO L78 Accepts]: Start accepts. Automaton has 6346 states and 9085 transitions. Word has length 241 [2018-10-24 14:24:36,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:24:36,200 INFO L481 AbstractCegarLoop]: Abstraction has 6346 states and 9085 transitions. [2018-10-24 14:24:36,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 14:24:36,201 INFO L276 IsEmpty]: Start isEmpty. Operand 6346 states and 9085 transitions. [2018-10-24 14:24:36,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-10-24 14:24:36,204 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:24:36,205 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:24:36,205 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:24:36,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:24:36,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1428658561, now seen corresponding path program 1 times [2018-10-24 14:24:36,205 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:24:36,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:24:36,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:36,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:36,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-10-24 14:24:36,546 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:24:36,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:24:36,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:24:36,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:24:36,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:24:36,548 INFO L87 Difference]: Start difference. First operand 6346 states and 9085 transitions. Second operand 4 states. [2018-10-24 14:24:38,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:24:38,855 INFO L93 Difference]: Finished difference Result 16980 states and 24791 transitions. [2018-10-24 14:24:38,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:24:38,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 244 [2018-10-24 14:24:38,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:24:38,915 INFO L225 Difference]: With dead ends: 16980 [2018-10-24 14:24:38,915 INFO L226 Difference]: Without dead ends: 10966 [2018-10-24 14:24:38,925 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 14:24:38,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10966 states. [2018-10-24 14:24:39,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10966 to 10966. [2018-10-24 14:24:39,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10966 states. [2018-10-24 14:24:39,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10966 states to 10966 states and 14706 transitions. [2018-10-24 14:24:39,102 INFO L78 Accepts]: Start accepts. Automaton has 10966 states and 14706 transitions. Word has length 244 [2018-10-24 14:24:39,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:24:39,102 INFO L481 AbstractCegarLoop]: Abstraction has 10966 states and 14706 transitions. [2018-10-24 14:24:39,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:24:39,103 INFO L276 IsEmpty]: Start isEmpty. Operand 10966 states and 14706 transitions. [2018-10-24 14:24:39,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2018-10-24 14:24:39,112 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:24:39,112 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:24:39,113 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:24:39,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:24:39,113 INFO L82 PathProgramCache]: Analyzing trace with hash 697681205, now seen corresponding path program 1 times [2018-10-24 14:24:39,113 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:24:39,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:24:39,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:39,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:39,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:39,545 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-24 14:24:39,546 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:24:39,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:24:39,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:24:39,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:24:39,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:24:39,548 INFO L87 Difference]: Start difference. First operand 10966 states and 14706 transitions. Second operand 3 states. [2018-10-24 14:24:42,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:24:42,192 INFO L93 Difference]: Finished difference Result 26550 states and 35820 transitions. [2018-10-24 14:24:42,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:24:42,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 394 [2018-10-24 14:24:42,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:24:42,215 INFO L225 Difference]: With dead ends: 26550 [2018-10-24 14:24:42,216 INFO L226 Difference]: Without dead ends: 12590 [2018-10-24 14:24:42,230 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 14:24:42,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12590 states. [2018-10-24 14:24:42,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12590 to 12590. [2018-10-24 14:24:42,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12590 states. [2018-10-24 14:24:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12590 states to 12590 states and 14003 transitions. [2018-10-24 14:24:42,392 INFO L78 Accepts]: Start accepts. Automaton has 12590 states and 14003 transitions. Word has length 394 [2018-10-24 14:24:42,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:24:42,392 INFO L481 AbstractCegarLoop]: Abstraction has 12590 states and 14003 transitions. [2018-10-24 14:24:42,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:24:42,392 INFO L276 IsEmpty]: Start isEmpty. Operand 12590 states and 14003 transitions. [2018-10-24 14:24:42,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2018-10-24 14:24:42,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:24:42,400 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:24:42,401 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:24:42,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:24:42,401 INFO L82 PathProgramCache]: Analyzing trace with hash 201322050, now seen corresponding path program 1 times [2018-10-24 14:24:42,401 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:24:42,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:24:42,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:42,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:42,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:24:42,833 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:24:42,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:24:42,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:24:42,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:24:42,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:24:42,835 INFO L87 Difference]: Start difference. First operand 12590 states and 14003 transitions. Second operand 4 states. [2018-10-24 14:24:45,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:24:45,716 INFO L93 Difference]: Finished difference Result 31778 states and 35523 transitions. [2018-10-24 14:24:45,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:24:45,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 410 [2018-10-24 14:24:45,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:24:45,756 INFO L225 Difference]: With dead ends: 31778 [2018-10-24 14:24:45,756 INFO L226 Difference]: Without dead ends: 19520 [2018-10-24 14:24:45,771 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 14:24:45,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19520 states. [2018-10-24 14:24:46,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19520 to 18530. [2018-10-24 14:24:46,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18530 states. [2018-10-24 14:24:46,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18530 states to 18530 states and 20230 transitions. [2018-10-24 14:24:46,041 INFO L78 Accepts]: Start accepts. Automaton has 18530 states and 20230 transitions. Word has length 410 [2018-10-24 14:24:46,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:24:46,042 INFO L481 AbstractCegarLoop]: Abstraction has 18530 states and 20230 transitions. [2018-10-24 14:24:46,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:24:46,043 INFO L276 IsEmpty]: Start isEmpty. Operand 18530 states and 20230 transitions. [2018-10-24 14:24:46,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-10-24 14:24:46,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:24:46,055 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:24:46,055 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:24:46,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:24:46,055 INFO L82 PathProgramCache]: Analyzing trace with hash -175545890, now seen corresponding path program 1 times [2018-10-24 14:24:46,056 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:24:46,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:24:46,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:46,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:46,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:46,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 67 proven. 130 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-24 14:24:47,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:24:47,734 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 14:24:47,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:47,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:24:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2018-10-24 14:24:48,284 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:24:48,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 10 [2018-10-24 14:24:48,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 14:24:48,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 14:24:48,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-10-24 14:24:48,287 INFO L87 Difference]: Start difference. First operand 18530 states and 20230 transitions. Second operand 11 states. [2018-10-24 14:24:48,481 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 14:24:57,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:24:57,792 INFO L93 Difference]: Finished difference Result 44021 states and 47868 transitions. [2018-10-24 14:24:57,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 14:24:57,792 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 422 [2018-10-24 14:24:57,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:24:57,839 INFO L225 Difference]: With dead ends: 44021 [2018-10-24 14:24:57,839 INFO L226 Difference]: Without dead ends: 25823 [2018-10-24 14:24:57,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2018-10-24 14:24:57,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25823 states. [2018-10-24 14:24:58,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25823 to 23809. [2018-10-24 14:24:58,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23809 states. [2018-10-24 14:24:58,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23809 states to 23809 states and 25479 transitions. [2018-10-24 14:24:58,236 INFO L78 Accepts]: Start accepts. Automaton has 23809 states and 25479 transitions. Word has length 422 [2018-10-24 14:24:58,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:24:58,237 INFO L481 AbstractCegarLoop]: Abstraction has 23809 states and 25479 transitions. [2018-10-24 14:24:58,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 14:24:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 23809 states and 25479 transitions. [2018-10-24 14:24:58,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2018-10-24 14:24:58,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:24:58,256 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:24:58,256 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:24:58,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:24:58,257 INFO L82 PathProgramCache]: Analyzing trace with hash 77242414, now seen corresponding path program 1 times [2018-10-24 14:24:58,257 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:24:58,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:24:58,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:58,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:58,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:58,913 WARN L179 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-24 14:24:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 457 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-10-24 14:24:59,189 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:24:59,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:24:59,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:24:59,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:24:59,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:24:59,191 INFO L87 Difference]: Start difference. First operand 23809 states and 25479 transitions. Second operand 4 states. [2018-10-24 14:25:02,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:25:02,796 INFO L93 Difference]: Finished difference Result 47286 states and 50624 transitions. [2018-10-24 14:25:02,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:25:02,797 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 548 [2018-10-24 14:25:02,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:25:02,818 INFO L225 Difference]: With dead ends: 47286 [2018-10-24 14:25:02,819 INFO L226 Difference]: Without dead ends: 23809 [2018-10-24 14:25:02,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:25:02,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23809 states. [2018-10-24 14:25:03,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23809 to 23809. [2018-10-24 14:25:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23809 states. [2018-10-24 14:25:03,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23809 states to 23809 states and 25204 transitions. [2018-10-24 14:25:03,090 INFO L78 Accepts]: Start accepts. Automaton has 23809 states and 25204 transitions. Word has length 548 [2018-10-24 14:25:03,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:25:03,091 INFO L481 AbstractCegarLoop]: Abstraction has 23809 states and 25204 transitions. [2018-10-24 14:25:03,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:25:03,092 INFO L276 IsEmpty]: Start isEmpty. Operand 23809 states and 25204 transitions. [2018-10-24 14:25:03,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2018-10-24 14:25:03,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:25:03,102 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:25:03,102 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:25:03,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:25:03,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1898482885, now seen corresponding path program 1 times [2018-10-24 14:25:03,103 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:25:03,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:25:03,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:25:03,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:25:03,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:25:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:25:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2018-10-24 14:25:03,695 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:25:03,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:25:03,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:25:03,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:25:03,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:25:03,697 INFO L87 Difference]: Start difference. First operand 23809 states and 25204 transitions. Second operand 4 states. [2018-10-24 14:25:06,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:25:06,541 INFO L93 Difference]: Finished difference Result 50585 states and 53469 transitions. [2018-10-24 14:25:06,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:25:06,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 571 [2018-10-24 14:25:06,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:25:06,564 INFO L225 Difference]: With dead ends: 50585 [2018-10-24 14:25:06,565 INFO L226 Difference]: Without dead ends: 27108 [2018-10-24 14:25:06,580 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 14:25:06,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27108 states. [2018-10-24 14:25:06,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27108 to 23806. [2018-10-24 14:25:06,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23806 states. [2018-10-24 14:25:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23806 states to 23806 states and 24891 transitions. [2018-10-24 14:25:06,837 INFO L78 Accepts]: Start accepts. Automaton has 23806 states and 24891 transitions. Word has length 571 [2018-10-24 14:25:06,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:25:06,838 INFO L481 AbstractCegarLoop]: Abstraction has 23806 states and 24891 transitions. [2018-10-24 14:25:06,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:25:06,838 INFO L276 IsEmpty]: Start isEmpty. Operand 23806 states and 24891 transitions. [2018-10-24 14:25:06,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1364 [2018-10-24 14:25:06,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:25:06,884 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-24 14:25:06,885 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:25:06,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:25:06,885 INFO L82 PathProgramCache]: Analyzing trace with hash 533836620, now seen corresponding path program 1 times [2018-10-24 14:25:06,885 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:25:06,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:25:06,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:25:06,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:25:06,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:25:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:25:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2927 backedges. 2056 proven. 0 refuted. 0 times theorem prover too weak. 871 trivial. 0 not checked. [2018-10-24 14:25:08,450 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:25:08,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:25:08,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:25:08,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:25:08,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:25:08,452 INFO L87 Difference]: Start difference. First operand 23806 states and 24891 transitions. Second operand 4 states. [2018-10-24 14:25:10,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:25:10,740 INFO L93 Difference]: Finished difference Result 47275 states and 49410 transitions. [2018-10-24 14:25:10,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:25:10,740 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1363 [2018-10-24 14:25:10,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:25:10,764 INFO L225 Difference]: With dead ends: 47275 [2018-10-24 14:25:10,764 INFO L226 Difference]: Without dead ends: 23471 [2018-10-24 14:25:10,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:25:10,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23471 states. [2018-10-24 14:25:10,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23471 to 23141. [2018-10-24 14:25:10,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23141 states. [2018-10-24 14:25:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23141 states to 23141 states and 23922 transitions. [2018-10-24 14:25:10,960 INFO L78 Accepts]: Start accepts. Automaton has 23141 states and 23922 transitions. Word has length 1363 [2018-10-24 14:25:10,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:25:10,961 INFO L481 AbstractCegarLoop]: Abstraction has 23141 states and 23922 transitions. [2018-10-24 14:25:10,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:25:10,961 INFO L276 IsEmpty]: Start isEmpty. Operand 23141 states and 23922 transitions. [2018-10-24 14:25:10,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1365 [2018-10-24 14:25:10,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:25:11,000 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-24 14:25:11,000 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:25:11,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:25:11,001 INFO L82 PathProgramCache]: Analyzing trace with hash -385920212, now seen corresponding path program 1 times [2018-10-24 14:25:11,001 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:25:11,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:25:11,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:25:11,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:25:11,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:25:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:25:12,331 WARN L179 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-10-24 14:25:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2933 backedges. 2160 proven. 0 refuted. 0 times theorem prover too weak. 773 trivial. 0 not checked. [2018-10-24 14:25:15,097 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:25:15,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-10-24 14:25:15,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 14:25:15,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 14:25:15,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-10-24 14:25:15,099 INFO L87 Difference]: Start difference. First operand 23141 states and 23922 transitions. Second operand 9 states. [2018-10-24 14:25:19,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:25:19,158 INFO L93 Difference]: Finished difference Result 46519 states and 48110 transitions. [2018-10-24 14:25:19,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 14:25:19,159 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1364 [2018-10-24 14:25:19,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:25:19,179 INFO L225 Difference]: With dead ends: 46519 [2018-10-24 14:25:19,179 INFO L226 Difference]: Without dead ends: 23380 [2018-10-24 14:25:19,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2018-10-24 14:25:19,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23380 states. [2018-10-24 14:25:19,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23380 to 21160. [2018-10-24 14:25:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21160 states. [2018-10-24 14:25:19,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21160 states to 21160 states and 21730 transitions. [2018-10-24 14:25:19,354 INFO L78 Accepts]: Start accepts. Automaton has 21160 states and 21730 transitions. Word has length 1364 [2018-10-24 14:25:19,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:25:19,355 INFO L481 AbstractCegarLoop]: Abstraction has 21160 states and 21730 transitions. [2018-10-24 14:25:19,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 14:25:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 21160 states and 21730 transitions. [2018-10-24 14:25:19,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1775 [2018-10-24 14:25:19,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:25:19,391 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 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] [2018-10-24 14:25:19,391 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:25:19,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:25:19,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1375269529, now seen corresponding path program 1 times [2018-10-24 14:25:19,392 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:25:19,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:25:19,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:25:19,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:25:19,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:25:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:25:20,519 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 14:25:20,791 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-10-24 14:25:21,133 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 14:25:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4982 backedges. 3529 proven. 0 refuted. 0 times theorem prover too weak. 1453 trivial. 0 not checked. [2018-10-24 14:25:23,873 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:25:23,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 14:25:23,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 14:25:23,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 14:25:23,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-24 14:25:23,874 INFO L87 Difference]: Start difference. First operand 21160 states and 21730 transitions. Second operand 6 states. [2018-10-24 14:25:26,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:25:26,455 INFO L93 Difference]: Finished difference Result 42982 states and 44140 transitions. [2018-10-24 14:25:26,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 14:25:26,456 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1774 [2018-10-24 14:25:26,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:25:26,476 INFO L225 Difference]: With dead ends: 42982 [2018-10-24 14:25:26,476 INFO L226 Difference]: Without dead ends: 21824 [2018-10-24 14:25:26,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-24 14:25:26,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21824 states. [2018-10-24 14:25:26,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21824 to 21490. [2018-10-24 14:25:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21490 states. [2018-10-24 14:25:26,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21490 states to 21490 states and 22068 transitions. [2018-10-24 14:25:26,659 INFO L78 Accepts]: Start accepts. Automaton has 21490 states and 22068 transitions. Word has length 1774 [2018-10-24 14:25:26,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:25:26,660 INFO L481 AbstractCegarLoop]: Abstraction has 21490 states and 22068 transitions. [2018-10-24 14:25:26,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 14:25:26,661 INFO L276 IsEmpty]: Start isEmpty. Operand 21490 states and 22068 transitions. [2018-10-24 14:25:26,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2033 [2018-10-24 14:25:26,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:25:26,694 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:25:26,694 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:25:26,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:25:26,695 INFO L82 PathProgramCache]: Analyzing trace with hash -802222378, now seen corresponding path program 1 times [2018-10-24 14:25:26,695 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:25:26,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:25:26,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:25:26,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:25:26,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:25:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:25:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6754 backedges. 2793 proven. 243 refuted. 0 times theorem prover too weak. 3718 trivial. 0 not checked. [2018-10-24 14:25:32,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:25:32,741 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 14:25:32,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:25:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:25:33,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:25:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6754 backedges. 2793 proven. 0 refuted. 0 times theorem prover too weak. 3961 trivial. 0 not checked. [2018-10-24 14:25:35,664 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:25:35,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2018-10-24 14:25:35,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 14:25:35,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 14:25:35,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-24 14:25:35,670 INFO L87 Difference]: Start difference. First operand 21490 states and 22068 transitions. Second operand 10 states. [2018-10-24 14:25:44,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:25:44,374 INFO L93 Difference]: Finished difference Result 45625 states and 46810 transitions. [2018-10-24 14:25:44,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 14:25:44,374 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 2032 [2018-10-24 14:25:44,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:25:44,394 INFO L225 Difference]: With dead ends: 45625 [2018-10-24 14:25:44,394 INFO L226 Difference]: Without dead ends: 24137 [2018-10-24 14:25:44,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2048 GetRequests, 2031 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2018-10-24 14:25:44,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24137 states. [2018-10-24 14:25:44,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24137 to 21490. [2018-10-24 14:25:44,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21490 states. [2018-10-24 14:25:44,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21490 states to 21490 states and 22060 transitions. [2018-10-24 14:25:44,577 INFO L78 Accepts]: Start accepts. Automaton has 21490 states and 22060 transitions. Word has length 2032 [2018-10-24 14:25:44,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:25:44,577 INFO L481 AbstractCegarLoop]: Abstraction has 21490 states and 22060 transitions. [2018-10-24 14:25:44,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 14:25:44,577 INFO L276 IsEmpty]: Start isEmpty. Operand 21490 states and 22060 transitions. [2018-10-24 14:25:44,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2064 [2018-10-24 14:25:44,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:25:44,612 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:25:44,612 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:25:44,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:25:44,613 INFO L82 PathProgramCache]: Analyzing trace with hash -16334730, now seen corresponding path program 1 times [2018-10-24 14:25:44,613 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:25:44,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:25:44,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:25:44,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:25:44,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:25:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:25:45,521 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2018-10-24 14:25:45,792 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-10-24 14:25:46,137 WARN L179 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-10-24 14:25:46,629 WARN L179 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2018-10-24 14:25:46,912 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2018-10-24 14:25:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7426 backedges. 2661 proven. 158 refuted. 0 times theorem prover too weak. 4607 trivial. 0 not checked. [2018-10-24 14:25:50,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:25:50,014 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 14:25:50,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:25:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:25:50,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:25:50,741 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 14:25:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7426 backedges. 2819 proven. 0 refuted. 0 times theorem prover too weak. 4607 trivial. 0 not checked. [2018-10-24 14:25:53,220 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:25:53,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2018-10-24 14:25:53,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 14:25:53,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 14:25:53,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-24 14:25:53,223 INFO L87 Difference]: Start difference. First operand 21490 states and 22060 transitions. Second operand 10 states. [2018-10-24 14:26:02,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:26:02,403 INFO L93 Difference]: Finished difference Result 55172 states and 56618 transitions. [2018-10-24 14:26:02,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 14:26:02,403 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 2063 [2018-10-24 14:26:02,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:26:02,431 INFO L225 Difference]: With dead ends: 55172 [2018-10-24 14:26:02,431 INFO L226 Difference]: Without dead ends: 33684 [2018-10-24 14:26:02,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2093 GetRequests, 2073 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2018-10-24 14:26:02,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33684 states. [2018-10-24 14:26:02,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33684 to 26701. [2018-10-24 14:26:02,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26701 states. [2018-10-24 14:26:02,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26701 states to 26701 states and 27309 transitions. [2018-10-24 14:26:02,690 INFO L78 Accepts]: Start accepts. Automaton has 26701 states and 27309 transitions. Word has length 2063 [2018-10-24 14:26:02,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:26:02,691 INFO L481 AbstractCegarLoop]: Abstraction has 26701 states and 27309 transitions. [2018-10-24 14:26:02,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 14:26:02,691 INFO L276 IsEmpty]: Start isEmpty. Operand 26701 states and 27309 transitions. [2018-10-24 14:26:02,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2125 [2018-10-24 14:26:02,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:26:02,731 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:26:02,731 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:26:02,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:26:02,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1055198405, now seen corresponding path program 1 times [2018-10-24 14:26:02,732 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:26:02,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:26:02,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:26:02,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:26:02,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:26:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:26:04,356 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 14:26:04,520 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 14:26:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7734 backedges. 3547 proven. 251 refuted. 0 times theorem prover too weak. 3936 trivial. 0 not checked. [2018-10-24 14:26:09,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:26:09,291 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 14:26:09,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:26:09,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:26:09,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:26:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7734 backedges. 4284 proven. 0 refuted. 0 times theorem prover too weak. 3450 trivial. 0 not checked. [2018-10-24 14:26:12,136 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:26:12,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2018-10-24 14:26:12,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 14:26:12,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 14:26:12,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-10-24 14:26:12,141 INFO L87 Difference]: Start difference. First operand 26701 states and 27309 transitions. Second operand 9 states. [2018-10-24 14:26:19,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:26:19,887 INFO L93 Difference]: Finished difference Result 57319 states and 58689 transitions. [2018-10-24 14:26:19,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 14:26:19,888 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 2124 [2018-10-24 14:26:19,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:26:19,916 INFO L225 Difference]: With dead ends: 57319 [2018-10-24 14:26:19,916 INFO L226 Difference]: Without dead ends: 30620 [2018-10-24 14:26:19,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2143 GetRequests, 2127 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-10-24 14:26:19,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30620 states. [2018-10-24 14:26:20,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30620 to 30138. [2018-10-24 14:26:20,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30138 states. [2018-10-24 14:26:20,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30138 states to 30138 states and 30770 transitions. [2018-10-24 14:26:20,164 INFO L78 Accepts]: Start accepts. Automaton has 30138 states and 30770 transitions. Word has length 2124 [2018-10-24 14:26:20,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:26:20,165 INFO L481 AbstractCegarLoop]: Abstraction has 30138 states and 30770 transitions. [2018-10-24 14:26:20,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 14:26:20,165 INFO L276 IsEmpty]: Start isEmpty. Operand 30138 states and 30770 transitions. [2018-10-24 14:26:20,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2436 [2018-10-24 14:26:20,216 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:26:20,218 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:26:20,218 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:26:20,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:26:20,219 INFO L82 PathProgramCache]: Analyzing trace with hash 223387130, now seen corresponding path program 1 times [2018-10-24 14:26:20,219 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:26:20,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:26:20,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:26:20,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:26:20,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:26:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:26:21,932 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 14:26:22,139 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-10-24 14:26:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9925 backedges. 4969 proven. 572 refuted. 0 times theorem prover too weak. 4384 trivial. 0 not checked. [2018-10-24 14:26:26,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:26:26,378 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:26:26,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:26:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:26:26,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:26:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9925 backedges. 5074 proven. 467 refuted. 0 times theorem prover too weak. 4384 trivial. 0 not checked. [2018-10-24 14:26:30,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:26:30,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2018-10-24 14:26:30,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 14:26:30,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 14:26:30,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 14:26:30,591 INFO L87 Difference]: Start difference. First operand 30138 states and 30770 transitions. Second operand 9 states. [2018-10-24 14:26:35,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:26:35,855 INFO L93 Difference]: Finished difference Result 60403 states and 61663 transitions. [2018-10-24 14:26:35,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 14:26:35,856 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 2435 [2018-10-24 14:26:35,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:26:35,883 INFO L225 Difference]: With dead ends: 60403 [2018-10-24 14:26:35,883 INFO L226 Difference]: Without dead ends: 31257 [2018-10-24 14:26:35,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2448 GetRequests, 2435 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-10-24 14:26:35,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31257 states. [2018-10-24 14:26:36,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31257 to 29891. [2018-10-24 14:26:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29891 states. [2018-10-24 14:26:36,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29891 states to 29891 states and 30437 transitions. [2018-10-24 14:26:36,190 INFO L78 Accepts]: Start accepts. Automaton has 29891 states and 30437 transitions. Word has length 2435 [2018-10-24 14:26:36,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:26:36,191 INFO L481 AbstractCegarLoop]: Abstraction has 29891 states and 30437 transitions. [2018-10-24 14:26:36,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 14:26:36,191 INFO L276 IsEmpty]: Start isEmpty. Operand 29891 states and 30437 transitions. [2018-10-24 14:26:36,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2458 [2018-10-24 14:26:36,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:26:36,247 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:26:36,248 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:26:36,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:26:36,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1470984143, now seen corresponding path program 1 times [2018-10-24 14:26:36,249 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:26:36,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:26:36,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:26:36,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:26:36,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:26:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:26:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10083 backedges. 6953 proven. 889 refuted. 0 times theorem prover too weak. 2241 trivial. 0 not checked. [2018-10-24 14:26:44,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:26:44,370 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:26:44,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:26:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:26:44,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:26:55,741 WARN L179 SmtUtils]: Spent 10.44 s on a formula simplification. DAG size of input: 432 DAG size of output: 27 [2018-10-24 14:26:56,513 WARN L179 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2018-10-24 14:27:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10083 backedges. 7832 proven. 10 refuted. 0 times theorem prover too weak. 2241 trivial. 0 not checked. [2018-10-24 14:27:08,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:27:08,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2018-10-24 14:27:08,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 14:27:08,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 14:27:08,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-10-24 14:27:08,877 INFO L87 Difference]: Start difference. First operand 29891 states and 30437 transitions. Second operand 13 states. [2018-10-24 14:27:19,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:27:19,833 INFO L93 Difference]: Finished difference Result 80955 states and 82396 transitions. [2018-10-24 14:27:19,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-24 14:27:19,833 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 2457 [2018-10-24 14:27:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:27:19,880 INFO L225 Difference]: With dead ends: 80955 [2018-10-24 14:27:19,880 INFO L226 Difference]: Without dead ends: 52056 [2018-10-24 14:27:19,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2490 GetRequests, 2386 SyntacticMatches, 81 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2018-10-24 14:27:19,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52056 states. [2018-10-24 14:27:20,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52056 to 31528. [2018-10-24 14:27:20,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31528 states. [2018-10-24 14:27:20,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31528 states to 31528 states and 32008 transitions. [2018-10-24 14:27:20,302 INFO L78 Accepts]: Start accepts. Automaton has 31528 states and 32008 transitions. Word has length 2457 [2018-10-24 14:27:20,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:27:20,304 INFO L481 AbstractCegarLoop]: Abstraction has 31528 states and 32008 transitions. [2018-10-24 14:27:20,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 14:27:20,304 INFO L276 IsEmpty]: Start isEmpty. Operand 31528 states and 32008 transitions. [2018-10-24 14:27:20,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2679 [2018-10-24 14:27:20,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:27:20,372 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:27:20,372 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:27:20,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:27:20,373 INFO L82 PathProgramCache]: Analyzing trace with hash 342412550, now seen corresponding path program 1 times [2018-10-24 14:27:20,373 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:27:20,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:27:20,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:27:20,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:27:20,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:27:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:27:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12206 backedges. 8936 proven. 1277 refuted. 0 times theorem prover too weak. 1993 trivial. 0 not checked. [2018-10-24 14:27:30,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:27:30,789 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:27:30,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:27:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:27:31,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:27:32,396 WARN L179 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 18 [2018-10-24 14:27:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12206 backedges. 9150 proven. 816 refuted. 0 times theorem prover too weak. 2240 trivial. 0 not checked. [2018-10-24 14:27:39,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:27:39,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2018-10-24 14:27:39,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 14:27:39,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 14:27:39,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2018-10-24 14:27:39,169 INFO L87 Difference]: Start difference. First operand 31528 states and 32008 transitions. Second operand 13 states. Received shutdown request... [2018-10-24 14:27:43,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 14:27:43,595 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 14:27:43,600 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 14:27:43,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:27:43 BoogieIcfgContainer [2018-10-24 14:27:43,601 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 14:27:43,601 INFO L168 Benchmark]: Toolchain (without parser) took 226262.38 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -158.9 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-10-24 14:27:43,603 INFO L168 Benchmark]: CDTParser took 0.22 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 14:27:43,603 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1102.27 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-10-24 14:27:43,604 INFO L168 Benchmark]: Boogie Procedure Inliner took 357.37 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 735.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -845.8 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. [2018-10-24 14:27:43,605 INFO L168 Benchmark]: Boogie Preprocessor took 180.63 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2018-10-24 14:27:43,605 INFO L168 Benchmark]: RCFGBuilder took 7002.95 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 282.6 MB). Peak memory consumption was 282.6 MB. Max. memory is 7.1 GB. [2018-10-24 14:27:43,606 INFO L168 Benchmark]: TraceAbstraction took 217610.91 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 1.6 GB in the end (delta: 305.5 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-10-24 14:27:43,611 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 1102.27 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 357.37 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 735.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -845.8 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 180.63 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7002.95 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 282.6 MB). Peak memory consumption was 282.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 217610.91 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 1.6 GB in the end (delta: 305.5 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 46). Cancelled while BasicCegarLoop was constructing difference of abstraction (31528states) and FLOYD_HOARE automaton (currently 8 states, 13 states before enhancement),while ReachableStatesComputation was computing reachable states (6591 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 397 locations, 1 error locations. TIMEOUT Result, 217.5s OverallTime, 19 OverallIterations, 13 TraceHistogramMax, 106.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4818 SDtfs, 25882 SDslu, 3071 SDs, 0 SdLazy, 73293 SolverSat, 5712 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 87.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14424 GetRequests, 14172 SyntacticMatches, 103 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 26.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31528occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.7s AutomataMinimizationTime, 18 MinimizatonAttempts, 41587 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 4.1s SatisfiabilityAnalysisTime, 62.3s InterpolantComputationTime, 35575 NumberOfCodeBlocks, 35575 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 35549 ConstructedInterpolants, 534 QuantifiedInterpolants, 317008903 SizeOfPredicates, 15 NumberOfNonLiveVariables, 16201 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 26 InterpolantComputations, 16 PerfectInterpolantSequences, 116593/121406 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown