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/Problem11_label00_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 17:55:22,178 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 17:55:22,180 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 17:55:22,193 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 17:55:22,193 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 17:55:22,194 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 17:55:22,195 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 17:55:22,197 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 17:55:22,199 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 17:55:22,199 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 17:55:22,200 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 17:55:22,201 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 17:55:22,202 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 17:55:22,203 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 17:55:22,204 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 17:55:22,205 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 17:55:22,206 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 17:55:22,208 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 17:55:22,210 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 17:55:22,214 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 17:55:22,215 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 17:55:22,221 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 17:55:22,223 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 17:55:22,241 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 17:55:22,271 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 17:55:22,271 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 17:55:22,272 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 17:55:22,272 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 17:55:22,273 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 17:55:22,273 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 17:55:22,273 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 17:55:22,274 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 17:55:22,274 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 17:55:22,274 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 17:55:22,274 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 17:55:22,274 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 17:55:22,275 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 17:55:22,275 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 17:55:22,275 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 17:55:22,275 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 17:55:22,276 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 17:55:22,276 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 17:55:22,276 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 17:55:22,276 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 17:55:22,276 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 17:55:22,277 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 17:55:22,277 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 17:55:22,277 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 17:55:22,277 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 17:55:22,277 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 17:55:22,277 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 17:55:22,278 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 17:55:22,342 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 17:55:22,354 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 17:55:22,358 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 17:55:22,359 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 17:55:22,359 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 17:55:22,360 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label00_false-unreach-call.c [2018-10-23 17:55:22,412 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e49154a45/727dca14abcb4d49aae0633debb492ff/FLAG3bd5fe609 [2018-10-23 17:55:23,045 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 17:55:23,046 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label00_false-unreach-call.c [2018-10-23 17:55:23,062 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e49154a45/727dca14abcb4d49aae0633debb492ff/FLAG3bd5fe609 [2018-10-23 17:55:23,078 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e49154a45/727dca14abcb4d49aae0633debb492ff [2018-10-23 17:55:23,089 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 17:55:23,091 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 17:55:23,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 17:55:23,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 17:55:23,097 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 17:55:23,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:55:23" (1/1) ... [2018-10-23 17:55:23,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b2e66ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:23, skipping insertion in model container [2018-10-23 17:55:23,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:55:23" (1/1) ... [2018-10-23 17:55:23,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 17:55:23,204 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 17:55:23,871 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 17:55:23,878 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 17:55:24,056 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 17:55:24,075 INFO L193 MainTranslator]: Completed translation [2018-10-23 17:55:24,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:24 WrapperNode [2018-10-23 17:55:24,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 17:55:24,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 17:55:24,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 17:55:24,077 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 17:55:24,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:24" (1/1) ... [2018-10-23 17:55:24,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:24" (1/1) ... [2018-10-23 17:55:24,398 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 17:55:24,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 17:55:24,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 17:55:24,399 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 17:55:24,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:24" (1/1) ... [2018-10-23 17:55:24,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:24" (1/1) ... [2018-10-23 17:55:24,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:24" (1/1) ... [2018-10-23 17:55:24,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:24" (1/1) ... [2018-10-23 17:55:24,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:24" (1/1) ... [2018-10-23 17:55:24,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:24" (1/1) ... [2018-10-23 17:55:24,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:24" (1/1) ... [2018-10-23 17:55:24,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 17:55:24,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 17:55:24,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 17:55:24,542 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 17:55:24,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 17:55:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 17:55:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 17:55:24,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 17:55:29,110 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 17:55:29,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:55:29 BoogieIcfgContainer [2018-10-23 17:55:29,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 17:55:29,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 17:55:29,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 17:55:29,117 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 17:55:29,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:55:23" (1/3) ... [2018-10-23 17:55:29,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a750eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:55:29, skipping insertion in model container [2018-10-23 17:55:29,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:24" (2/3) ... [2018-10-23 17:55:29,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a750eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:55:29, skipping insertion in model container [2018-10-23 17:55:29,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:55:29" (3/3) ... [2018-10-23 17:55:29,122 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label00_false-unreach-call.c [2018-10-23 17:55:29,132 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 17:55:29,143 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 17:55:29,158 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 17:55:29,195 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 17:55:29,196 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 17:55:29,197 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 17:55:29,197 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 17:55:29,197 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 17:55:29,197 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 17:55:29,199 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 17:55:29,199 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 17:55:29,199 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 17:55:29,225 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states. [2018-10-23 17:55:29,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-23 17:55:29,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:55:29,234 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:55:29,236 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:55:29,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:55:29,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1805984234, now seen corresponding path program 1 times [2018-10-23 17:55:29,245 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:55:29,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:55:29,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:55:29,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:55:29,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:55:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:55:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:55:29,471 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:55:29,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 17:55:29,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 17:55:29,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 17:55:29,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:55:29,496 INFO L87 Difference]: Start difference. First operand 284 states. Second operand 3 states. [2018-10-23 17:55:31,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:55:31,977 INFO L93 Difference]: Finished difference Result 764 states and 1348 transitions. [2018-10-23 17:55:31,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:55:31,980 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-23 17:55:31,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:55:32,000 INFO L225 Difference]: With dead ends: 764 [2018-10-23 17:55:32,001 INFO L226 Difference]: Without dead ends: 476 [2018-10-23 17:55:32,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:55:32,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2018-10-23 17:55:32,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 476. [2018-10-23 17:55:32,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2018-10-23 17:55:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 723 transitions. [2018-10-23 17:55:32,078 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 723 transitions. Word has length 7 [2018-10-23 17:55:32,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:55:32,079 INFO L481 AbstractCegarLoop]: Abstraction has 476 states and 723 transitions. [2018-10-23 17:55:32,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 17:55:32,079 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 723 transitions. [2018-10-23 17:55:32,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-23 17:55:32,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:55:32,082 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 17:55:32,082 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:55:32,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:55:32,083 INFO L82 PathProgramCache]: Analyzing trace with hash 252209906, now seen corresponding path program 1 times [2018-10-23 17:55:32,083 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:55:32,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:55:32,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:55:32,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:55:32,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:55:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:55:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:55:32,415 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:55:32,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:55:32,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:55:32,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:55:32,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:55:32,419 INFO L87 Difference]: Start difference. First operand 476 states and 723 transitions. Second operand 4 states. [2018-10-23 17:55:36,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:55:36,599 INFO L93 Difference]: Finished difference Result 1713 states and 2683 transitions. [2018-10-23 17:55:36,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:55:36,600 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2018-10-23 17:55:36,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:55:36,607 INFO L225 Difference]: With dead ends: 1713 [2018-10-23 17:55:36,607 INFO L226 Difference]: Without dead ends: 1239 [2018-10-23 17:55:36,611 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 [2018-10-23 17:55:36,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2018-10-23 17:55:36,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1222. [2018-10-23 17:55:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1222 states. [2018-10-23 17:55:36,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 1765 transitions. [2018-10-23 17:55:36,668 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 1765 transitions. Word has length 76 [2018-10-23 17:55:36,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:55:36,669 INFO L481 AbstractCegarLoop]: Abstraction has 1222 states and 1765 transitions. [2018-10-23 17:55:36,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:55:36,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 1765 transitions. [2018-10-23 17:55:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-23 17:55:36,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:55:36,677 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 17:55:36,678 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:55:36,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:55:36,681 INFO L82 PathProgramCache]: Analyzing trace with hash 2120204934, now seen corresponding path program 1 times [2018-10-23 17:55:36,681 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:55:36,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:55:36,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:55:36,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:55:36,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:55:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:55:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:55:36,924 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:55:36,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:55:36,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:55:36,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:55:36,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:55:36,925 INFO L87 Difference]: Start difference. First operand 1222 states and 1765 transitions. Second operand 4 states. [2018-10-23 17:55:41,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:55:41,856 INFO L93 Difference]: Finished difference Result 4508 states and 6630 transitions. [2018-10-23 17:55:41,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:55:41,857 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2018-10-23 17:55:41,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:55:41,874 INFO L225 Difference]: With dead ends: 4508 [2018-10-23 17:55:41,875 INFO L226 Difference]: Without dead ends: 3288 [2018-10-23 17:55:41,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:55:41,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2018-10-23 17:55:41,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 2333. [2018-10-23 17:55:41,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2333 states. [2018-10-23 17:55:41,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 3059 transitions. [2018-10-23 17:55:41,934 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 3059 transitions. Word has length 84 [2018-10-23 17:55:41,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:55:41,935 INFO L481 AbstractCegarLoop]: Abstraction has 2333 states and 3059 transitions. [2018-10-23 17:55:41,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:55:41,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 3059 transitions. [2018-10-23 17:55:41,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-23 17:55:41,940 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:55:41,940 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 17:55:41,940 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:55:41,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:55:41,941 INFO L82 PathProgramCache]: Analyzing trace with hash -711414924, now seen corresponding path program 1 times [2018-10-23 17:55:41,941 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:55:41,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:55:41,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:55:41,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:55:41,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:55:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:55:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:55:42,085 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:55:42,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:55:42,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 17:55:42,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 17:55:42,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:55:42,086 INFO L87 Difference]: Start difference. First operand 2333 states and 3059 transitions. Second operand 3 states. [2018-10-23 17:55:43,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:55:43,621 INFO L93 Difference]: Finished difference Result 5231 states and 6955 transitions. [2018-10-23 17:55:43,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:55:43,622 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 135 [2018-10-23 17:55:43,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:55:43,637 INFO L225 Difference]: With dead ends: 5231 [2018-10-23 17:55:43,637 INFO L226 Difference]: Without dead ends: 3085 [2018-10-23 17:55:43,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:55:43,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2018-10-23 17:55:43,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 3075. [2018-10-23 17:55:43,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3075 states. [2018-10-23 17:55:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3075 states to 3075 states and 3850 transitions. [2018-10-23 17:55:43,697 INFO L78 Accepts]: Start accepts. Automaton has 3075 states and 3850 transitions. Word has length 135 [2018-10-23 17:55:43,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:55:43,698 INFO L481 AbstractCegarLoop]: Abstraction has 3075 states and 3850 transitions. [2018-10-23 17:55:43,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 17:55:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3075 states and 3850 transitions. [2018-10-23 17:55:43,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-23 17:55:43,704 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:55:43,704 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:55:43,704 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:55:43,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:55:43,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1216999507, now seen corresponding path program 1 times [2018-10-23 17:55:43,705 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:55:43,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:55:43,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:55:43,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:55:43,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:55:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:55:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-23 17:55:43,885 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:55:43,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:55:43,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 17:55:43,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 17:55:43,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:55:43,886 INFO L87 Difference]: Start difference. First operand 3075 states and 3850 transitions. Second operand 3 states. [2018-10-23 17:55:45,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:55:45,731 INFO L93 Difference]: Finished difference Result 6713 states and 8534 transitions. [2018-10-23 17:55:45,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:55:45,732 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 190 [2018-10-23 17:55:45,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:55:45,749 INFO L225 Difference]: With dead ends: 6713 [2018-10-23 17:55:45,750 INFO L226 Difference]: Without dead ends: 3825 [2018-10-23 17:55:45,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:55:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2018-10-23 17:55:45,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 3815. [2018-10-23 17:55:45,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3815 states. [2018-10-23 17:55:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3815 states to 3815 states and 4711 transitions. [2018-10-23 17:55:45,838 INFO L78 Accepts]: Start accepts. Automaton has 3815 states and 4711 transitions. Word has length 190 [2018-10-23 17:55:45,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:55:45,839 INFO L481 AbstractCegarLoop]: Abstraction has 3815 states and 4711 transitions. [2018-10-23 17:55:45,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 17:55:45,839 INFO L276 IsEmpty]: Start isEmpty. Operand 3815 states and 4711 transitions. [2018-10-23 17:55:45,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-23 17:55:45,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:55:45,843 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:55:45,844 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:55:45,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:55:45,844 INFO L82 PathProgramCache]: Analyzing trace with hash -288878765, now seen corresponding path program 1 times [2018-10-23 17:55:45,845 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:55:45,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:55:45,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:55:45,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:55:45,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:55:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:55:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-10-23 17:55:46,065 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:55:46,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:55:46,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 17:55:46,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 17:55:46,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:55:46,069 INFO L87 Difference]: Start difference. First operand 3815 states and 4711 transitions. Second operand 3 states. [2018-10-23 17:55:49,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:55:49,381 INFO L93 Difference]: Finished difference Result 7454 states and 9251 transitions. [2018-10-23 17:55:49,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:55:49,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 191 [2018-10-23 17:55:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:55:49,398 INFO L225 Difference]: With dead ends: 7454 [2018-10-23 17:55:49,398 INFO L226 Difference]: Without dead ends: 3826 [2018-10-23 17:55:49,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:55:49,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2018-10-23 17:55:49,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 3630. [2018-10-23 17:55:49,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3630 states. [2018-10-23 17:55:49,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 4456 transitions. [2018-10-23 17:55:49,463 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 4456 transitions. Word has length 191 [2018-10-23 17:55:49,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:55:49,464 INFO L481 AbstractCegarLoop]: Abstraction has 3630 states and 4456 transitions. [2018-10-23 17:55:49,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 17:55:49,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 4456 transitions. [2018-10-23 17:55:49,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-10-23 17:55:49,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:55:49,468 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:55:49,468 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:55:49,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:55:49,468 INFO L82 PathProgramCache]: Analyzing trace with hash -200068027, now seen corresponding path program 1 times [2018-10-23 17:55:49,469 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:55:49,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:55:49,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:55:49,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:55:49,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:55:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:55:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 9 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:55:49,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:55:49,864 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 17:55:49,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:55:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:55:49,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:55:50,754 WARN L179 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 28 [2018-10-23 17:55:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 9 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:55:51,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 17:55:51,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2018-10-23 17:55:51,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 17:55:51,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 17:55:51,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-23 17:55:51,312 INFO L87 Difference]: Start difference. First operand 3630 states and 4456 transitions. Second operand 7 states. [2018-10-23 17:55:51,539 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-10-23 17:56:03,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:56:03,416 INFO L93 Difference]: Finished difference Result 13231 states and 16738 transitions. [2018-10-23 17:56:03,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-23 17:56:03,422 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 211 [2018-10-23 17:56:03,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:56:03,460 INFO L225 Difference]: With dead ends: 13231 [2018-10-23 17:56:03,460 INFO L226 Difference]: Without dead ends: 9224 [2018-10-23 17:56:03,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2018-10-23 17:56:03,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9224 states. [2018-10-23 17:56:03,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9224 to 8837. [2018-10-23 17:56:03,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8837 states. [2018-10-23 17:56:03,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8837 states to 8837 states and 10625 transitions. [2018-10-23 17:56:03,647 INFO L78 Accepts]: Start accepts. Automaton has 8837 states and 10625 transitions. Word has length 211 [2018-10-23 17:56:03,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:56:03,648 INFO L481 AbstractCegarLoop]: Abstraction has 8837 states and 10625 transitions. [2018-10-23 17:56:03,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 17:56:03,648 INFO L276 IsEmpty]: Start isEmpty. Operand 8837 states and 10625 transitions. [2018-10-23 17:56:03,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-10-23 17:56:03,653 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:56:03,653 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:56:03,653 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:56:03,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:56:03,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1903243135, now seen corresponding path program 1 times [2018-10-23 17:56:03,654 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:56:03,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:56:03,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:56:03,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:56:03,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:56:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:56:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:56:04,104 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:56:04,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 17:56:04,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 17:56:04,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 17:56:04,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 17:56:04,105 INFO L87 Difference]: Start difference. First operand 8837 states and 10625 transitions. Second operand 5 states. [2018-10-23 17:56:07,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:56:07,712 INFO L93 Difference]: Finished difference Result 26416 states and 31979 transitions. [2018-10-23 17:56:07,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 17:56:07,713 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 221 [2018-10-23 17:56:07,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:56:07,759 INFO L225 Difference]: With dead ends: 26416 [2018-10-23 17:56:07,759 INFO L226 Difference]: Without dead ends: 15328 [2018-10-23 17:56:07,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 17:56:07,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15328 states. [2018-10-23 17:56:07,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15328 to 15138. [2018-10-23 17:56:07,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15138 states. [2018-10-23 17:56:07,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15138 states to 15138 states and 17342 transitions. [2018-10-23 17:56:07,988 INFO L78 Accepts]: Start accepts. Automaton has 15138 states and 17342 transitions. Word has length 221 [2018-10-23 17:56:07,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:56:07,989 INFO L481 AbstractCegarLoop]: Abstraction has 15138 states and 17342 transitions. [2018-10-23 17:56:07,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 17:56:07,989 INFO L276 IsEmpty]: Start isEmpty. Operand 15138 states and 17342 transitions. [2018-10-23 17:56:07,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-23 17:56:07,993 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:56:07,993 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2018-10-23 17:56:07,993 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:56:07,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:56:07,994 INFO L82 PathProgramCache]: Analyzing trace with hash -278196410, now seen corresponding path program 1 times [2018-10-23 17:56:07,994 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:56:07,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:56:07,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:56:07,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:56:07,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:56:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:56:08,504 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 17:56:08,943 WARN L179 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2018-10-23 17:56:09,404 WARN L179 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2018-10-23 17:56:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:56:09,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:56:09,690 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 17:56:09,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:56:09,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:56:09,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:56:10,150 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-23 17:56:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 75 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:56:10,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 17:56:10,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2018-10-23 17:56:10,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 17:56:10,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 17:56:10,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-10-23 17:56:10,440 INFO L87 Difference]: Start difference. First operand 15138 states and 17342 transitions. Second operand 11 states. [2018-10-23 17:56:19,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:56:19,873 INFO L93 Difference]: Finished difference Result 35597 states and 40702 transitions. [2018-10-23 17:56:19,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-23 17:56:19,873 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 223 [2018-10-23 17:56:19,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:56:19,910 INFO L225 Difference]: With dead ends: 35597 [2018-10-23 17:56:19,910 INFO L226 Difference]: Without dead ends: 19781 [2018-10-23 17:56:19,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2018-10-23 17:56:19,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19781 states. [2018-10-23 17:56:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19781 to 16832. [2018-10-23 17:56:20,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16832 states. [2018-10-23 17:56:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16832 states to 16832 states and 18922 transitions. [2018-10-23 17:56:20,176 INFO L78 Accepts]: Start accepts. Automaton has 16832 states and 18922 transitions. Word has length 223 [2018-10-23 17:56:20,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:56:20,176 INFO L481 AbstractCegarLoop]: Abstraction has 16832 states and 18922 transitions. [2018-10-23 17:56:20,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-23 17:56:20,177 INFO L276 IsEmpty]: Start isEmpty. Operand 16832 states and 18922 transitions. [2018-10-23 17:56:20,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-10-23 17:56:20,182 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:56:20,182 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:56:20,183 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:56:20,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:56:20,183 INFO L82 PathProgramCache]: Analyzing trace with hash 721350625, now seen corresponding path program 1 times [2018-10-23 17:56:20,183 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:56:20,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:56:20,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:56:20,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:56:20,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:56:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:56:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:56:20,581 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:56:20,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:56:20,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:56:20,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:56:20,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:56:20,583 INFO L87 Difference]: Start difference. First operand 16832 states and 18922 transitions. Second operand 4 states. [2018-10-23 17:56:23,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:56:23,227 INFO L93 Difference]: Finished difference Result 32367 states and 36528 transitions. [2018-10-23 17:56:23,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:56:23,228 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 242 [2018-10-23 17:56:23,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:56:23,256 INFO L225 Difference]: With dead ends: 32367 [2018-10-23 17:56:23,256 INFO L226 Difference]: Without dead ends: 16818 [2018-10-23 17:56:23,272 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 [2018-10-23 17:56:23,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16818 states. [2018-10-23 17:56:23,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16818 to 13965. [2018-10-23 17:56:23,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13965 states. [2018-10-23 17:56:23,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13965 states to 13965 states and 15504 transitions. [2018-10-23 17:56:23,472 INFO L78 Accepts]: Start accepts. Automaton has 13965 states and 15504 transitions. Word has length 242 [2018-10-23 17:56:23,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:56:23,473 INFO L481 AbstractCegarLoop]: Abstraction has 13965 states and 15504 transitions. [2018-10-23 17:56:23,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:56:23,473 INFO L276 IsEmpty]: Start isEmpty. Operand 13965 states and 15504 transitions. [2018-10-23 17:56:23,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-10-23 17:56:23,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:56:23,478 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:56:23,478 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:56:23,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:56:23,479 INFO L82 PathProgramCache]: Analyzing trace with hash 970404768, now seen corresponding path program 1 times [2018-10-23 17:56:23,479 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:56:23,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:56:23,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:56:23,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:56:23,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:56:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:56:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-10-23 17:56:23,677 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:56:23,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:56:23,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 17:56:23,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 17:56:23,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:56:23,678 INFO L87 Difference]: Start difference. First operand 13965 states and 15504 transitions. Second operand 3 states. [2018-10-23 17:56:24,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:56:24,903 INFO L93 Difference]: Finished difference Result 25519 states and 28398 transitions. [2018-10-23 17:56:24,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:56:24,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 248 [2018-10-23 17:56:24,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:56:24,919 INFO L225 Difference]: With dead ends: 25519 [2018-10-23 17:56:24,919 INFO L226 Difference]: Without dead ends: 13965 [2018-10-23 17:56:24,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:56:24,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13965 states. [2018-10-23 17:56:25,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13965 to 13780. [2018-10-23 17:56:25,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13780 states. [2018-10-23 17:56:25,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13780 states to 13780 states and 15226 transitions. [2018-10-23 17:56:25,101 INFO L78 Accepts]: Start accepts. Automaton has 13780 states and 15226 transitions. Word has length 248 [2018-10-23 17:56:25,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:56:25,102 INFO L481 AbstractCegarLoop]: Abstraction has 13780 states and 15226 transitions. [2018-10-23 17:56:25,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 17:56:25,102 INFO L276 IsEmpty]: Start isEmpty. Operand 13780 states and 15226 transitions. [2018-10-23 17:56:25,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-10-23 17:56:25,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:56:25,108 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:56:25,108 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:56:25,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:56:25,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1274978665, now seen corresponding path program 1 times [2018-10-23 17:56:25,109 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:56:25,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:56:25,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:56:25,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:56:25,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:56:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:56:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 94 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:56:25,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:56:25,613 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 [2018-10-23 17:56:25,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:56:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:56:25,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:56:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 9 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:56:26,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 17:56:26,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-10-23 17:56:26,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 17:56:26,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 17:56:26,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-10-23 17:56:26,250 INFO L87 Difference]: Start difference. First operand 13780 states and 15226 transitions. Second operand 9 states. [2018-10-23 17:56:34,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:56:34,324 INFO L93 Difference]: Finished difference Result 34821 states and 38514 transitions. [2018-10-23 17:56:34,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-23 17:56:34,329 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 266 [2018-10-23 17:56:34,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:56:34,356 INFO L225 Difference]: With dead ends: 34821 [2018-10-23 17:56:34,356 INFO L226 Difference]: Without dead ends: 20273 [2018-10-23 17:56:34,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2018-10-23 17:56:34,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20273 states. [2018-10-23 17:56:34,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20273 to 14930. [2018-10-23 17:56:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14930 states. [2018-10-23 17:56:34,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14930 states to 14930 states and 16174 transitions. [2018-10-23 17:56:34,608 INFO L78 Accepts]: Start accepts. Automaton has 14930 states and 16174 transitions. Word has length 266 [2018-10-23 17:56:34,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:56:34,609 INFO L481 AbstractCegarLoop]: Abstraction has 14930 states and 16174 transitions. [2018-10-23 17:56:34,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 17:56:34,609 INFO L276 IsEmpty]: Start isEmpty. Operand 14930 states and 16174 transitions. [2018-10-23 17:56:34,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-10-23 17:56:34,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:56:34,615 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:56:34,616 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:56:34,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:56:34,616 INFO L82 PathProgramCache]: Analyzing trace with hash -267079001, now seen corresponding path program 1 times [2018-10-23 17:56:34,616 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:56:34,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:56:34,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:56:34,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:56:34,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:56:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:56:35,121 WARN L179 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-10-23 17:56:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-10-23 17:56:35,165 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:56:35,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 17:56:35,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:56:35,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:56:35,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:56:35,166 INFO L87 Difference]: Start difference. First operand 14930 states and 16174 transitions. Second operand 4 states. [2018-10-23 17:56:38,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:56:38,044 INFO L93 Difference]: Finished difference Result 31727 states and 34314 transitions. [2018-10-23 17:56:38,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:56:38,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 292 [2018-10-23 17:56:38,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:56:38,065 INFO L225 Difference]: With dead ends: 31727 [2018-10-23 17:56:38,065 INFO L226 Difference]: Without dead ends: 16517 [2018-10-23 17:56:38,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:56:38,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16517 states. [2018-10-23 17:56:38,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16517 to 12983. [2018-10-23 17:56:38,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12983 states. [2018-10-23 17:56:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12983 states to 12983 states and 13970 transitions. [2018-10-23 17:56:38,299 INFO L78 Accepts]: Start accepts. Automaton has 12983 states and 13970 transitions. Word has length 292 [2018-10-23 17:56:38,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:56:38,300 INFO L481 AbstractCegarLoop]: Abstraction has 12983 states and 13970 transitions. [2018-10-23 17:56:38,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:56:38,300 INFO L276 IsEmpty]: Start isEmpty. Operand 12983 states and 13970 transitions. [2018-10-23 17:56:38,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-10-23 17:56:38,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:56:38,307 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:56:38,307 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:56:38,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:56:38,308 INFO L82 PathProgramCache]: Analyzing trace with hash -915599231, now seen corresponding path program 1 times [2018-10-23 17:56:38,308 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:56:38,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:56:38,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:56:38,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:56:38,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:56:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:56:38,932 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-23 17:56:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 14 proven. 181 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-10-23 17:56:39,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:56:39,080 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 [2018-10-23 17:56:39,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:56:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:56:39,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:56:40,518 WARN L179 SmtUtils]: Spent 988.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 28 [2018-10-23 17:56:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 14 proven. 181 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-10-23 17:56:41,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 17:56:41,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2018-10-23 17:56:41,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 17:56:41,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 17:56:41,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-23 17:56:41,269 INFO L87 Difference]: Start difference. First operand 12983 states and 13970 transitions. Second operand 7 states. [2018-10-23 17:56:45,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:56:45,015 INFO L93 Difference]: Finished difference Result 23091 states and 24881 transitions. [2018-10-23 17:56:45,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 17:56:45,015 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 319 [2018-10-23 17:56:45,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:56:45,031 INFO L225 Difference]: With dead ends: 23091 [2018-10-23 17:56:45,032 INFO L226 Difference]: Without dead ends: 12896 [2018-10-23 17:56:45,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-10-23 17:56:45,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12896 states. [2018-10-23 17:56:45,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12896 to 12706. [2018-10-23 17:56:45,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12706 states. [2018-10-23 17:56:45,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12706 states to 12706 states and 13638 transitions. [2018-10-23 17:56:45,198 INFO L78 Accepts]: Start accepts. Automaton has 12706 states and 13638 transitions. Word has length 319 [2018-10-23 17:56:45,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:56:45,199 INFO L481 AbstractCegarLoop]: Abstraction has 12706 states and 13638 transitions. [2018-10-23 17:56:45,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 17:56:45,199 INFO L276 IsEmpty]: Start isEmpty. Operand 12706 states and 13638 transitions. [2018-10-23 17:56:45,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2018-10-23 17:56:45,205 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:56:45,205 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:56:45,205 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:56:45,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:56:45,206 INFO L82 PathProgramCache]: Analyzing trace with hash 2085459001, now seen corresponding path program 1 times [2018-10-23 17:56:45,206 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:56:45,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:56:45,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:56:45,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:56:45,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:56:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:56:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-23 17:56:45,674 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:56:45,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 17:56:45,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 17:56:45,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 17:56:45,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 17:56:45,676 INFO L87 Difference]: Start difference. First operand 12706 states and 13638 transitions. Second operand 5 states. [2018-10-23 17:56:48,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:56:48,087 INFO L93 Difference]: Finished difference Result 27637 states and 29615 transitions. [2018-10-23 17:56:48,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 17:56:48,088 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2018-10-23 17:56:48,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:56:48,105 INFO L225 Difference]: With dead ends: 27637 [2018-10-23 17:56:48,105 INFO L226 Difference]: Without dead ends: 15117 [2018-10-23 17:56:48,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 17:56:48,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15117 states. [2018-10-23 17:56:48,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15117 to 11031. [2018-10-23 17:56:48,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11031 states. [2018-10-23 17:56:48,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11031 states to 11031 states and 11692 transitions. [2018-10-23 17:56:48,287 INFO L78 Accepts]: Start accepts. Automaton has 11031 states and 11692 transitions. Word has length 325 [2018-10-23 17:56:48,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:56:48,287 INFO L481 AbstractCegarLoop]: Abstraction has 11031 states and 11692 transitions. [2018-10-23 17:56:48,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 17:56:48,287 INFO L276 IsEmpty]: Start isEmpty. Operand 11031 states and 11692 transitions. [2018-10-23 17:56:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2018-10-23 17:56:48,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:56:48,294 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 17:56:48,294 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:56:48,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:56:48,295 INFO L82 PathProgramCache]: Analyzing trace with hash 625125048, now seen corresponding path program 1 times [2018-10-23 17:56:48,295 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:56:48,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:56:48,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:56:48,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:56:48,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:56:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:56:49,204 WARN L179 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2018-10-23 17:56:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 104 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:56:49,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:56:49,855 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 [2018-10-23 17:56:49,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:56:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:56:49,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:56:50,356 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-23 17:56:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 113 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:56:50,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 17:56:50,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2018-10-23 17:56:50,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 17:56:50,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 17:56:50,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-10-23 17:56:50,843 INFO L87 Difference]: Start difference. First operand 11031 states and 11692 transitions. Second operand 12 states. [2018-10-23 17:56:58,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:56:58,908 INFO L93 Difference]: Finished difference Result 22274 states and 23634 transitions. [2018-10-23 17:56:58,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-23 17:56:58,909 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 361 [2018-10-23 17:56:58,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:56:58,920 INFO L225 Difference]: With dead ends: 22274 [2018-10-23 17:56:58,920 INFO L226 Difference]: Without dead ends: 13116 [2018-10-23 17:56:58,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 357 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2018-10-23 17:56:58,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13116 states. [2018-10-23 17:56:59,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13116 to 11574. [2018-10-23 17:56:59,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11574 states. [2018-10-23 17:56:59,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11574 states to 11574 states and 12227 transitions. [2018-10-23 17:56:59,088 INFO L78 Accepts]: Start accepts. Automaton has 11574 states and 12227 transitions. Word has length 361 [2018-10-23 17:56:59,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:56:59,088 INFO L481 AbstractCegarLoop]: Abstraction has 11574 states and 12227 transitions. [2018-10-23 17:56:59,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-23 17:56:59,089 INFO L276 IsEmpty]: Start isEmpty. Operand 11574 states and 12227 transitions. [2018-10-23 17:56:59,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2018-10-23 17:56:59,098 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:56:59,099 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:56:59,099 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:56:59,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:56:59,099 INFO L82 PathProgramCache]: Analyzing trace with hash 888532162, now seen corresponding path program 1 times [2018-10-23 17:56:59,100 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:56:59,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:56:59,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:56:59,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:56:59,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:56:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:56:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 105 proven. 233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:56:59,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:56:59,552 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 [2018-10-23 17:56:59,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:56:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:56:59,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:57:02,384 WARN L179 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 43 DAG size of output: 19 [2018-10-23 17:57:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 105 proven. 233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:57:03,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 17:57:03,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-10-23 17:57:03,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 17:57:03,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 17:57:03,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=49, Unknown=1, NotChecked=0, Total=72 [2018-10-23 17:57:03,609 INFO L87 Difference]: Start difference. First operand 11574 states and 12227 transitions. Second operand 9 states. [2018-10-23 17:57:04,500 WARN L179 SmtUtils]: Spent 784.00 ms on a formula simplification that was a NOOP. DAG size: 20 Received shutdown request... [2018-10-23 17:59:32,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-23 17:59:32,613 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 17:59:32,619 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 17:59:32,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 05:59:32 BoogieIcfgContainer [2018-10-23 17:59:32,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 17:59:32,621 INFO L168 Benchmark]: Toolchain (without parser) took 249530.86 ms. Allocated memory was 1.5 GB in the beginning and 3.4 GB in the end (delta: 1.8 GB). Free memory was 1.4 GB in the beginning and 2.9 GB in the end (delta: -1.5 GB). Peak memory consumption was 327.6 MB. Max. memory is 7.1 GB. [2018-10-23 17:59:32,623 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. [2018-10-23 17:59:32,623 INFO L168 Benchmark]: CACSL2BoogieTranslator took 984.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-10-23 17:59:32,624 INFO L168 Benchmark]: Boogie Procedure Inliner took 321.07 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 757.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -849.5 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. [2018-10-23 17:59:32,625 INFO L168 Benchmark]: Boogie Preprocessor took 142.51 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 17:59:32,625 INFO L168 Benchmark]: RCFGBuilder took 4570.28 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 191.6 MB). Peak memory consumption was 191.6 MB. Max. memory is 7.1 GB. [2018-10-23 17:59:32,626 INFO L168 Benchmark]: TraceAbstraction took 243506.75 ms. Allocated memory was 2.3 GB in the beginning and 3.4 GB in the end (delta: 1.1 GB). Free memory was 2.0 GB in the beginning and 2.9 GB in the end (delta: -903.5 MB). Peak memory consumption was 165.0 MB. Max. memory is 7.1 GB. [2018-10-23 17:59:32,631 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 984.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 321.07 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 757.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -849.5 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 142.51 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 4570.28 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 191.6 MB). Peak memory consumption was 191.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 243506.75 ms. Allocated memory was 2.3 GB in the beginning and 3.4 GB in the end (delta: 1.1 GB). Free memory was 2.0 GB in the beginning and 2.9 GB in the end (delta: -903.5 MB). Peak memory consumption was 165.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 24). Cancelled while BasicCegarLoop was constructing difference of abstraction (11574states) and FLOYD_HOARE automaton (currently 12 states, 9 states before enhancement),while ReachableStatesComputation was computing reachable states (8918 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 284 locations, 1 error locations. TIMEOUT Result, 243.4s OverallTime, 17 OverallIterations, 4 TraceHistogramMax, 222.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3414 SDtfs, 15213 SDslu, 1973 SDs, 0 SdLazy, 34511 SolverSat, 6115 SolverUnsat, 188 SolverUnknown, 0 SolverNotchecked, 206.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1904 GetRequests, 1783 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 14.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16832occurred in iteration=9, 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: 2.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 22447 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 15.7s InterpolantComputationTime, 5581 NumberOfCodeBlocks, 5581 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 5558 ConstructedInterpolants, 527 QuantifiedInterpolants, 13468027 SizeOfPredicates, 14 NumberOfNonLiveVariables, 2436 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 23 InterpolantComputations, 11 PerfectInterpolantSequences, 1890/3529 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown