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/loop-invgen/string_concat-noarr_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 11:58:04,286 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 11:58:04,289 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 11:58:04,306 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 11:58:04,306 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 11:58:04,307 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 11:58:04,309 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 11:58:04,311 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 11:58:04,313 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 11:58:04,314 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 11:58:04,315 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 11:58:04,315 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 11:58:04,316 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 11:58:04,317 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 11:58:04,318 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 11:58:04,319 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 11:58:04,320 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 11:58:04,322 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 11:58:04,324 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 11:58:04,326 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 11:58:04,327 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 11:58:04,328 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 11:58:04,331 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 11:58:04,341 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 11:58:04,356 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 11:58:04,358 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 11:58:04,359 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 11:58:04,360 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 11:58:04,364 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 11:58:04,364 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 11:58:04,364 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 11:58:04,365 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 11:58:04,365 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 11:58:04,365 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 11:58:04,365 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 11:58:04,365 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 11:58:04,366 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 11:58:04,366 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 11:58:04,366 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 11:58:04,366 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 11:58:04,366 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 11:58:04,367 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 11:58:04,368 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 11:58:04,368 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:58:04,368 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 11:58:04,368 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 11:58:04,368 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 11:58:04,369 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 11:58:04,369 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 11:58:04,369 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 11:58:04,369 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 11:58:04,369 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 11:58:04,421 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 11:58:04,434 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 11:58:04,438 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 11:58:04,440 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 11:58:04,440 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 11:58:04,441 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr_true-unreach-call_true-termination.i [2018-10-24 11:58:04,499 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/278c9937b/8b130cef09534454b52c72aec58dc95c/FLAG95a33f04d [2018-10-24 11:58:04,932 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 11:58:04,934 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr_true-unreach-call_true-termination.i [2018-10-24 11:58:04,942 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/278c9937b/8b130cef09534454b52c72aec58dc95c/FLAG95a33f04d [2018-10-24 11:58:04,956 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/278c9937b/8b130cef09534454b52c72aec58dc95c [2018-10-24 11:58:04,965 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 11:58:04,967 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 11:58:04,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 11:58:04,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 11:58:04,975 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 11:58:04,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:58:04" (1/1) ... [2018-10-24 11:58:04,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15c4512c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:04, skipping insertion in model container [2018-10-24 11:58:04,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:58:04" (1/1) ... [2018-10-24 11:58:04,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 11:58:05,011 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 11:58:05,224 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:58:05,229 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 11:58:05,253 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:58:05,271 INFO L193 MainTranslator]: Completed translation [2018-10-24 11:58:05,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:05 WrapperNode [2018-10-24 11:58:05,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 11:58:05,273 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 11:58:05,273 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 11:58:05,274 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 11:58:05,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:05" (1/1) ... [2018-10-24 11:58:05,293 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:05" (1/1) ... [2018-10-24 11:58:05,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 11:58:05,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 11:58:05,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 11:58:05,316 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 11:58:05,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:05" (1/1) ... [2018-10-24 11:58:05,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:05" (1/1) ... [2018-10-24 11:58:05,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:05" (1/1) ... [2018-10-24 11:58:05,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:05" (1/1) ... [2018-10-24 11:58:05,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:05" (1/1) ... [2018-10-24 11:58:05,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:05" (1/1) ... [2018-10-24 11:58:05,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:05" (1/1) ... [2018-10-24 11:58:05,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 11:58:05,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 11:58:05,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 11:58:05,351 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 11:58:05,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:58:05,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 11:58:05,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 11:58:05,754 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 11:58:05,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:58:05 BoogieIcfgContainer [2018-10-24 11:58:05,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 11:58:05,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 11:58:05,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 11:58:05,764 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 11:58:05,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:58:04" (1/3) ... [2018-10-24 11:58:05,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605c9331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:58:05, skipping insertion in model container [2018-10-24 11:58:05,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:05" (2/3) ... [2018-10-24 11:58:05,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605c9331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:58:05, skipping insertion in model container [2018-10-24 11:58:05,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:58:05" (3/3) ... [2018-10-24 11:58:05,772 INFO L112 eAbstractionObserver]: Analyzing ICFG string_concat-noarr_true-unreach-call_true-termination.i [2018-10-24 11:58:05,785 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 11:58:05,797 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 11:58:05,816 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 11:58:05,858 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 11:58:05,858 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 11:58:05,859 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 11:58:05,859 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 11:58:05,859 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 11:58:05,859 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 11:58:05,859 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 11:58:05,860 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 11:58:05,860 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 11:58:05,875 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-10-24 11:58:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-24 11:58:05,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:05,882 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:05,884 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:05,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:05,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1240807568, now seen corresponding path program 1 times [2018-10-24 11:58:05,893 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:05,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:05,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:05,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:05,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:06,011 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:58:06,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 11:58:06,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 11:58:06,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 11:58:06,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:58:06,031 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-10-24 11:58:06,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:06,047 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2018-10-24 11:58:06,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 11:58:06,049 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-10-24 11:58:06,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:06,060 INFO L225 Difference]: With dead ends: 32 [2018-10-24 11:58:06,061 INFO L226 Difference]: Without dead ends: 14 [2018-10-24 11:58:06,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:58:06,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-24 11:58:06,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-24 11:58:06,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-24 11:58:06,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-24 11:58:06,098 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2018-10-24 11:58:06,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:06,099 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-24 11:58:06,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 11:58:06,099 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-24 11:58:06,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-24 11:58:06,100 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:06,100 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:06,100 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:06,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:06,101 INFO L82 PathProgramCache]: Analyzing trace with hash 525249980, now seen corresponding path program 1 times [2018-10-24 11:58:06,101 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:06,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:06,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:06,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:06,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:06,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:06,297 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:58:06,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 11:58:06,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 11:58:06,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 11:58:06,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-24 11:58:06,304 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2018-10-24 11:58:06,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:06,497 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-10-24 11:58:06,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 11:58:06,498 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-10-24 11:58:06,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:06,499 INFO L225 Difference]: With dead ends: 25 [2018-10-24 11:58:06,499 INFO L226 Difference]: Without dead ends: 21 [2018-10-24 11:58:06,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:58:06,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-24 11:58:06,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-24 11:58:06,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-24 11:58:06,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-24 11:58:06,508 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2018-10-24 11:58:06,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:06,508 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-24 11:58:06,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 11:58:06,508 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-24 11:58:06,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-24 11:58:06,510 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:06,510 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:06,512 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:06,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:06,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1808282751, now seen corresponding path program 1 times [2018-10-24 11:58:06,513 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:06,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:06,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:06,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:06,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:06,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:06,596 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:06,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:06,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:06,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:06,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-24 11:58:06,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 11:58:06,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 11:58:06,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:58:06,816 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2018-10-24 11:58:07,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:07,264 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2018-10-24 11:58:07,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 11:58:07,265 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-10-24 11:58:07,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:07,268 INFO L225 Difference]: With dead ends: 50 [2018-10-24 11:58:07,268 INFO L226 Difference]: Without dead ends: 42 [2018-10-24 11:58:07,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:58:07,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-24 11:58:07,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2018-10-24 11:58:07,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-24 11:58:07,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2018-10-24 11:58:07,275 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 16 [2018-10-24 11:58:07,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:07,276 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2018-10-24 11:58:07,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 11:58:07,276 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2018-10-24 11:58:07,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-24 11:58:07,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:07,277 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:07,278 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:07,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:07,278 INFO L82 PathProgramCache]: Analyzing trace with hash 332243324, now seen corresponding path program 2 times [2018-10-24 11:58:07,278 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:07,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:07,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:07,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:07,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:07,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:07,431 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:07,441 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:58:07,486 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:58:07,486 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:07,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:07,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:07,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-10-24 11:58:07,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 11:58:07,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 11:58:07,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:58:07,764 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 13 states. [2018-10-24 11:58:09,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:09,036 INFO L93 Difference]: Finished difference Result 116 states and 132 transitions. [2018-10-24 11:58:09,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 11:58:09,039 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-10-24 11:58:09,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:09,043 INFO L225 Difference]: With dead ends: 116 [2018-10-24 11:58:09,043 INFO L226 Difference]: Without dead ends: 102 [2018-10-24 11:58:09,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2018-10-24 11:58:09,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-24 11:58:09,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 64. [2018-10-24 11:58:09,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-24 11:58:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2018-10-24 11:58:09,060 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 25 [2018-10-24 11:58:09,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:09,061 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2018-10-24 11:58:09,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 11:58:09,061 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2018-10-24 11:58:09,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-24 11:58:09,063 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:09,063 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:09,063 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:09,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:09,064 INFO L82 PathProgramCache]: Analyzing trace with hash -122567908, now seen corresponding path program 3 times [2018-10-24 11:58:09,064 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:09,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:09,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:09,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:09,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:09,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:09,387 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:09,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:58:09,459 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-24 11:58:09,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:09,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:09,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:09,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-10-24 11:58:09,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-24 11:58:09,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-24 11:58:09,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2018-10-24 11:58:09,957 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 25 states. [2018-10-24 11:58:10,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:10,714 INFO L93 Difference]: Finished difference Result 284 states and 318 transitions. [2018-10-24 11:58:10,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-24 11:58:10,714 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 43 [2018-10-24 11:58:10,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:10,718 INFO L225 Difference]: With dead ends: 284 [2018-10-24 11:58:10,718 INFO L226 Difference]: Without dead ends: 258 [2018-10-24 11:58:10,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=458, Invalid=874, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 11:58:10,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-10-24 11:58:10,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 124. [2018-10-24 11:58:10,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-24 11:58:10,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 136 transitions. [2018-10-24 11:58:10,735 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 136 transitions. Word has length 43 [2018-10-24 11:58:10,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:10,736 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 136 transitions. [2018-10-24 11:58:10,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-24 11:58:10,736 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 136 transitions. [2018-10-24 11:58:10,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-24 11:58:10,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:10,740 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:10,740 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:10,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:10,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1682403748, now seen corresponding path program 4 times [2018-10-24 11:58:10,741 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:10,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:10,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:10,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:10,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:11,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:11,469 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:11,479 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:58:11,535 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:58:11,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:11,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:12,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:12,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 49 [2018-10-24 11:58:12,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-24 11:58:12,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-24 11:58:12,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2018-10-24 11:58:12,719 INFO L87 Difference]: Start difference. First operand 124 states and 136 transitions. Second operand 49 states. [2018-10-24 11:58:14,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:14,646 INFO L93 Difference]: Finished difference Result 782 states and 852 transitions. [2018-10-24 11:58:14,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-24 11:58:14,647 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 79 [2018-10-24 11:58:14,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:14,652 INFO L225 Difference]: With dead ends: 782 [2018-10-24 11:58:14,652 INFO L226 Difference]: Without dead ends: 732 [2018-10-24 11:58:14,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1778, Invalid=3478, Unknown=0, NotChecked=0, Total=5256 [2018-10-24 11:58:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2018-10-24 11:58:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 244. [2018-10-24 11:58:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-24 11:58:14,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 268 transitions. [2018-10-24 11:58:14,675 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 268 transitions. Word has length 79 [2018-10-24 11:58:14,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:14,675 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 268 transitions. [2018-10-24 11:58:14,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-24 11:58:14,676 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 268 transitions. [2018-10-24 11:58:14,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-24 11:58:14,679 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:14,679 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:14,679 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:14,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:14,680 INFO L82 PathProgramCache]: Analyzing trace with hash -224901924, now seen corresponding path program 5 times [2018-10-24 11:58:14,680 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:14,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:14,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:14,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:14,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:16,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:16,228 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:16,235 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:58:16,402 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2018-10-24 11:58:16,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:16,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:19,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:19,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 97 [2018-10-24 11:58:19,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-24 11:58:19,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-24 11:58:19,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2018-10-24 11:58:19,348 INFO L87 Difference]: Start difference. First operand 244 states and 268 transitions. Second operand 97 states. [2018-10-24 11:58:25,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:25,487 INFO L93 Difference]: Finished difference Result 2426 states and 2568 transitions. [2018-10-24 11:58:25,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-24 11:58:25,488 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 151 [2018-10-24 11:58:25,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:25,500 INFO L225 Difference]: With dead ends: 2426 [2018-10-24 11:58:25,500 INFO L226 Difference]: Without dead ends: 2328 [2018-10-24 11:58:25,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=7010, Invalid=13870, Unknown=0, NotChecked=0, Total=20880 [2018-10-24 11:58:25,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2018-10-24 11:58:25,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 484. [2018-10-24 11:58:25,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-10-24 11:58:25,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 532 transitions. [2018-10-24 11:58:25,542 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 532 transitions. Word has length 151 [2018-10-24 11:58:25,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:25,545 INFO L481 AbstractCegarLoop]: Abstraction has 484 states and 532 transitions. [2018-10-24 11:58:25,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-24 11:58:25,545 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 532 transitions. [2018-10-24 11:58:25,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-10-24 11:58:25,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:25,558 INFO L375 BasicCegarLoop]: trace histogram [95, 95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:25,558 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:25,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:25,559 INFO L82 PathProgramCache]: Analyzing trace with hash -832556580, now seen corresponding path program 6 times [2018-10-24 11:58:25,559 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:25,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:25,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:25,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:25,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 13395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:29,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:29,676 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:29,683 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:58:30,087 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2018-10-24 11:58:30,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:30,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 13395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:40,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:40,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 193 [2018-10-24 11:58:40,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 193 states [2018-10-24 11:58:40,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2018-10-24 11:58:40,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18338, Invalid=18718, Unknown=0, NotChecked=0, Total=37056 [2018-10-24 11:58:40,372 INFO L87 Difference]: Start difference. First operand 484 states and 532 transitions. Second operand 193 states. [2018-10-24 11:59:16,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:16,889 INFO L93 Difference]: Finished difference Result 8306 states and 8592 transitions. [2018-10-24 11:59:16,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 288 states. [2018-10-24 11:59:16,890 INFO L78 Accepts]: Start accepts. Automaton has 193 states. Word has length 295 [2018-10-24 11:59:16,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:16,919 INFO L225 Difference]: With dead ends: 8306 [2018-10-24 11:59:16,920 INFO L226 Difference]: Without dead ends: 8112 [2018-10-24 11:59:16,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4843 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=27842, Invalid=55390, Unknown=0, NotChecked=0, Total=83232 [2018-10-24 11:59:16,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8112 states. [2018-10-24 11:59:16,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8112 to 964. [2018-10-24 11:59:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 964 states. [2018-10-24 11:59:16,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1060 transitions. [2018-10-24 11:59:16,979 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1060 transitions. Word has length 295 [2018-10-24 11:59:16,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:16,979 INFO L481 AbstractCegarLoop]: Abstraction has 964 states and 1060 transitions. [2018-10-24 11:59:16,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 193 states. [2018-10-24 11:59:16,980 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1060 transitions. [2018-10-24 11:59:16,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2018-10-24 11:59:16,992 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:16,992 INFO L375 BasicCegarLoop]: trace histogram [191, 191, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:16,992 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:16,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:16,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1410468828, now seen corresponding path program 7 times [2018-10-24 11:59:16,993 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:16,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:16,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:16,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:16,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 54435 backedges. 54435 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:32,716 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:59:32,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [193] imperfect sequences [] total 193 [2018-10-24 11:59:32,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 193 states [2018-10-24 11:59:32,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2018-10-24 11:59:32,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2018-10-24 11:59:32,722 INFO L87 Difference]: Start difference. First operand 964 states and 1060 transitions. Second operand 193 states. [2018-10-24 11:59:34,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:34,851 INFO L93 Difference]: Finished difference Result 41829 states and 42015 transitions. [2018-10-24 11:59:34,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2018-10-24 11:59:34,851 INFO L78 Accepts]: Start accepts. Automaton has 193 states. Word has length 583 [2018-10-24 11:59:34,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:34,858 INFO L225 Difference]: With dead ends: 41829 [2018-10-24 11:59:34,858 INFO L226 Difference]: Without dead ends: 1786 [2018-10-24 11:59:34,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2018-10-24 11:59:34,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2018-10-24 11:59:34,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1770. [2018-10-24 11:59:34,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1770 states. [2018-10-24 11:59:34,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 1778 transitions. [2018-10-24 11:59:34,920 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 1778 transitions. Word has length 583 [2018-10-24 11:59:34,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:34,920 INFO L481 AbstractCegarLoop]: Abstraction has 1770 states and 1778 transitions. [2018-10-24 11:59:34,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 193 states. [2018-10-24 11:59:34,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 1778 transitions. [2018-10-24 11:59:34,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2018-10-24 11:59:34,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:34,933 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 99, 92, 92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:34,934 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:34,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:34,934 INFO L82 PathProgramCache]: Analyzing trace with hash -895219466, now seen corresponding path program 1 times [2018-10-24 11:59:34,934 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:34,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:34,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:34,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:34,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 27408 backedges. 0 proven. 27408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:50,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:50,331 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:50,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:50,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 27408 backedges. 0 proven. 27408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:51,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:51,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194] total 194 [2018-10-24 11:59:51,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 194 states [2018-10-24 11:59:51,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2018-10-24 11:59:51,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2018-10-24 11:59:51,095 INFO L87 Difference]: Start difference. First operand 1770 states and 1778 transitions. Second operand 194 states. [2018-10-24 12:00:06,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:06,724 INFO L93 Difference]: Finished difference Result 3304 states and 3411 transitions. [2018-10-24 12:00:06,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2018-10-24 12:00:06,724 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 583 [2018-10-24 12:00:06,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:06,735 INFO L225 Difference]: With dead ends: 3304 [2018-10-24 12:00:06,735 INFO L226 Difference]: Without dead ends: 2999 [2018-10-24 12:00:06,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 583 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=18534, Invalid=19296, Unknown=0, NotChecked=0, Total=37830 [2018-10-24 12:00:06,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2999 states. [2018-10-24 12:00:06,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2999 to 1773. [2018-10-24 12:00:06,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1773 states. [2018-10-24 12:00:06,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 1781 transitions. [2018-10-24 12:00:06,769 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 1781 transitions. Word has length 583 [2018-10-24 12:00:06,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:06,770 INFO L481 AbstractCegarLoop]: Abstraction has 1773 states and 1781 transitions. [2018-10-24 12:00:06,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 194 states. [2018-10-24 12:00:06,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 1781 transitions. [2018-10-24 12:00:06,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2018-10-24 12:00:06,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:06,777 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 99, 93, 93, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:06,777 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:06,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:06,777 INFO L82 PathProgramCache]: Analyzing trace with hash -582669855, now seen corresponding path program 2 times [2018-10-24 12:00:06,778 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:06,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:06,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:06,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:06,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:22,593 INFO L134 CoverageAnalysis]: Checked inductivity of 27684 backedges. 0 proven. 27684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:22,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:22,594 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:22,602 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:00:22,887 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:00:22,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:22,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:23,428 INFO L134 CoverageAnalysis]: Checked inductivity of 27684 backedges. 0 proven. 27684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:23,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:23,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [195, 195] total 195 [2018-10-24 12:00:23,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 195 states [2018-10-24 12:00:23,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2018-10-24 12:00:23,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18723, Invalid=19107, Unknown=0, NotChecked=0, Total=37830 [2018-10-24 12:00:23,455 INFO L87 Difference]: Start difference. First operand 1773 states and 1781 transitions. Second operand 195 states. [2018-10-24 12:00:42,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:42,849 INFO L93 Difference]: Finished difference Result 3028 states and 3135 transitions. [2018-10-24 12:00:42,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2018-10-24 12:00:42,850 INFO L78 Accepts]: Start accepts. Automaton has 195 states. Word has length 586 [2018-10-24 12:00:42,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:42,858 INFO L225 Difference]: With dead ends: 3028 [2018-10-24 12:00:42,859 INFO L226 Difference]: Without dead ends: 2723 [2018-10-24 12:00:42,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 586 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=18727, Invalid=19493, Unknown=0, NotChecked=0, Total=38220 [2018-10-24 12:00:42,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2018-10-24 12:00:42,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 1776. [2018-10-24 12:00:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1776 states. [2018-10-24 12:00:42,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 1784 transitions. [2018-10-24 12:00:42,888 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 1784 transitions. Word has length 586 [2018-10-24 12:00:42,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:42,889 INFO L481 AbstractCegarLoop]: Abstraction has 1776 states and 1784 transitions. [2018-10-24 12:00:42,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 195 states. [2018-10-24 12:00:42,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 1784 transitions. [2018-10-24 12:00:42,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2018-10-24 12:00:42,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:42,896 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 99, 94, 94, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:42,896 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:42,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:42,897 INFO L82 PathProgramCache]: Analyzing trace with hash -906306282, now seen corresponding path program 3 times [2018-10-24 12:00:42,897 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:42,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:42,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:42,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:42,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 27963 backedges. 0 proven. 27963 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:57,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:57,615 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:57,623 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:00:58,170 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-10-24 12:00:58,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:58,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 27963 backedges. 0 proven. 27963 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:58,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:58,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [196, 196] total 196 [2018-10-24 12:00:58,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-10-24 12:00:58,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-10-24 12:00:58,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18917, Invalid=19303, Unknown=0, NotChecked=0, Total=38220 [2018-10-24 12:00:58,617 INFO L87 Difference]: Start difference. First operand 1776 states and 1784 transitions. Second operand 196 states. [2018-10-24 12:01:10,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:10,803 INFO L93 Difference]: Finished difference Result 2749 states and 2856 transitions. [2018-10-24 12:01:10,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2018-10-24 12:01:10,804 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 589 [2018-10-24 12:01:10,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:10,814 INFO L225 Difference]: With dead ends: 2749 [2018-10-24 12:01:10,815 INFO L226 Difference]: Without dead ends: 2444 [2018-10-24 12:01:10,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 589 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=18921, Invalid=19691, Unknown=0, NotChecked=0, Total=38612 [2018-10-24 12:01:10,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2018-10-24 12:01:10,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1779. [2018-10-24 12:01:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1779 states. [2018-10-24 12:01:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 1787 transitions. [2018-10-24 12:01:10,840 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 1787 transitions. Word has length 589 [2018-10-24 12:01:10,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:10,841 INFO L481 AbstractCegarLoop]: Abstraction has 1779 states and 1787 transitions. [2018-10-24 12:01:10,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-10-24 12:01:10,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 1787 transitions. [2018-10-24 12:01:10,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2018-10-24 12:01:10,847 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:10,847 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 99, 95, 95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:10,848 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:10,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:10,848 INFO L82 PathProgramCache]: Analyzing trace with hash -157523519, now seen corresponding path program 4 times [2018-10-24 12:01:10,848 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:10,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:10,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:10,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:10,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 28245 backedges. 0 proven. 28245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:26,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:26,405 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:26,414 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:01:26,633 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:01:26,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:26,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 28245 backedges. 0 proven. 28245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:27,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:27,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [197, 197] total 197 [2018-10-24 12:01:27,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 197 states [2018-10-24 12:01:27,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2018-10-24 12:01:27,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19112, Invalid=19500, Unknown=0, NotChecked=0, Total=38612 [2018-10-24 12:01:27,414 INFO L87 Difference]: Start difference. First operand 1779 states and 1787 transitions. Second operand 197 states. [2018-10-24 12:01:46,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:46,561 INFO L93 Difference]: Finished difference Result 2467 states and 2574 transitions. [2018-10-24 12:01:46,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2018-10-24 12:01:46,561 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 592 [2018-10-24 12:01:46,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:46,568 INFO L225 Difference]: With dead ends: 2467 [2018-10-24 12:01:46,569 INFO L226 Difference]: Without dead ends: 2162 [2018-10-24 12:01:46,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 592 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=19116, Invalid=19890, Unknown=0, NotChecked=0, Total=39006 [2018-10-24 12:01:46,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2018-10-24 12:01:46,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 1782. [2018-10-24 12:01:46,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1782 states. [2018-10-24 12:01:46,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 1790 transitions. [2018-10-24 12:01:46,591 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 1790 transitions. Word has length 592 [2018-10-24 12:01:46,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:46,591 INFO L481 AbstractCegarLoop]: Abstraction has 1782 states and 1790 transitions. [2018-10-24 12:01:46,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 197 states. [2018-10-24 12:01:46,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 1790 transitions. [2018-10-24 12:01:46,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2018-10-24 12:01:46,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:46,598 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 99, 96, 96, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:46,599 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:46,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:46,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1230366410, now seen corresponding path program 5 times [2018-10-24 12:01:46,599 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:46,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:46,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:46,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:46,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 28530 backedges. 0 proven. 28530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:01,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:01,148 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:01,155 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:02:01,765 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 100 check-sat command(s) [2018-10-24 12:02:01,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:01,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 28530 backedges. 0 proven. 28530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:03,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:03,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [198, 198] total 198 [2018-10-24 12:02:03,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 198 states [2018-10-24 12:02:03,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2018-10-24 12:02:03,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19308, Invalid=19698, Unknown=0, NotChecked=0, Total=39006 [2018-10-24 12:02:03,298 INFO L87 Difference]: Start difference. First operand 1782 states and 1790 transitions. Second operand 198 states. Received shutdown request... [2018-10-24 12:02:18,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2018-10-24 12:02:18,826 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 12:02:18,831 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 12:02:18,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:02:18 BoogieIcfgContainer [2018-10-24 12:02:18,832 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 12:02:18,833 INFO L168 Benchmark]: Toolchain (without parser) took 253866.78 ms. Allocated memory was 1.5 GB in the beginning and 3.1 GB in the end (delta: 1.5 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -486.2 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2018-10-24 12:02:18,834 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:02:18,835 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.37 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-24 12:02:18,836 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.16 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:02:18,836 INFO L168 Benchmark]: Boogie Preprocessor took 33.84 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:02:18,837 INFO L168 Benchmark]: RCFGBuilder took 404.63 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -809.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-10-24 12:02:18,838 INFO L168 Benchmark]: TraceAbstraction took 253075.31 ms. Allocated memory was 2.3 GB in the beginning and 3.1 GB in the end (delta: 767.0 MB). Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 313.0 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-10-24 12:02:18,842 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 304.37 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.16 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.84 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 404.63 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -809.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 253075.31 ms. Allocated memory was 2.3 GB in the beginning and 3.1 GB in the end (delta: 767.0 MB). Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 313.0 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was constructing difference of abstraction (1782states) and FLOYD_HOARE automaton (currently 171 states, 198 states before enhancement),while ReachableStatesComputation was computing reachable states (1629 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. TIMEOUT Result, 252.9s OverallTime, 14 OverallIterations, 191 TraceHistogramMax, 131.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 520 SDtfs, 17333 SDslu, 6762 SDs, 0 SdLazy, 6435 SolverSat, 3897 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5117 GetRequests, 3377 SyntacticMatches, 11 SemanticMatches, 1729 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8505 ImplicationChecksByTransitivity, 125.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1782occurred in iteration=13, 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: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 12894 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 4.4s SatisfiabilityAnalysisTime, 114.0s InterpolantComputationTime, 7713 NumberOfCodeBlocks, 7713 NumberOfCodeBlocksAsserted, 377 NumberOfCheckSat, 7688 ConstructedInterpolants, 0 QuantifiedInterpolants, 12038314 SizeOfPredicates, 33 NumberOfNonLiveVariables, 9578 ConjunctsInSsa, 1214 ConjunctsInUnsatCore, 25 InterpolantComputations, 3 PerfectInterpolantSequences, 54435/369285 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown