java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label04_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:27:39,036 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:27:39,038 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:27:39,055 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:27:39,055 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:27:39,057 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:27:39,059 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:27:39,061 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:27:39,064 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:27:39,067 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:27:39,068 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:27:39,068 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:27:39,071 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:27:39,074 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:27:39,082 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:27:39,083 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:27:39,084 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:27:39,086 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:27:39,088 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:27:39,089 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:27:39,090 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:27:39,092 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:27:39,094 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 16:27:39,103 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 16:27:39,126 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:27:39,126 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:27:39,128 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:27:39,128 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:27:39,129 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:27:39,129 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:27:39,129 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:27:39,130 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:27:39,133 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:27:39,133 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:27:39,133 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:27:39,133 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:27:39,133 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:27:39,134 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:27:39,134 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:27:39,134 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:27:39,134 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:27:39,134 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:27:39,135 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:27:39,135 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:27:39,135 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:27:39,135 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:27:39,135 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:27:39,136 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:27:39,136 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:27:39,136 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:27:39,136 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:27:39,136 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:27:39,190 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:27:39,203 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:27:39,207 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:27:39,208 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:27:39,209 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:27:39,210 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label04_true-unreach-call_false-termination.c [2018-10-24 16:27:39,292 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3085bec04/b2e907a64e6340a0a95215708e856f25/FLAG44991a7f2 [2018-10-24 16:27:39,909 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:27:39,911 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label04_true-unreach-call_false-termination.c [2018-10-24 16:27:39,928 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3085bec04/b2e907a64e6340a0a95215708e856f25/FLAG44991a7f2 [2018-10-24 16:27:39,951 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3085bec04/b2e907a64e6340a0a95215708e856f25 [2018-10-24 16:27:39,965 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:27:39,967 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:27:39,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:27:39,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:27:39,974 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:27:39,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:27:39" (1/1) ... [2018-10-24 16:27:39,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bc5d6a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:27:39, skipping insertion in model container [2018-10-24 16:27:39,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:27:39" (1/1) ... [2018-10-24 16:27:39,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:27:40,079 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:27:40,597 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:27:40,602 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:27:40,763 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:27:40,780 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:27:40,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:27:40 WrapperNode [2018-10-24 16:27:40,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:27:40,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:27:40,782 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:27:40,782 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:27:40,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:27:40" (1/1) ... [2018-10-24 16:27:40,816 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:27:40" (1/1) ... [2018-10-24 16:27:41,017 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:27:41,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:27:41,018 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:27:41,018 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:27:41,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:27:40" (1/1) ... [2018-10-24 16:27:41,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:27:40" (1/1) ... [2018-10-24 16:27:41,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:27:40" (1/1) ... [2018-10-24 16:27:41,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:27:40" (1/1) ... [2018-10-24 16:27:41,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:27:40" (1/1) ... [2018-10-24 16:27:41,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:27:40" (1/1) ... [2018-10-24 16:27:41,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:27:40" (1/1) ... [2018-10-24 16:27:41,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:27:41,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:27:41,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:27:41,124 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:27:41,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:27:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:27:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:27:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:27:41,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:27:45,032 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:27:45,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:27:45 BoogieIcfgContainer [2018-10-24 16:27:45,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:27:45,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:27:45,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:27:45,043 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:27:45,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:27:39" (1/3) ... [2018-10-24 16:27:45,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c40b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:27:45, skipping insertion in model container [2018-10-24 16:27:45,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:27:40" (2/3) ... [2018-10-24 16:27:45,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c40b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:27:45, skipping insertion in model container [2018-10-24 16:27:45,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:27:45" (3/3) ... [2018-10-24 16:27:45,049 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label04_true-unreach-call_false-termination.c [2018-10-24 16:27:45,060 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:27:45,073 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:27:45,094 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:27:45,145 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:27:45,146 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:27:45,146 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:27:45,146 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:27:45,147 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:27:45,147 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:27:45,148 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:27:45,148 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:27:45,148 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:27:45,184 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states. [2018-10-24 16:27:45,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-24 16:27:45,203 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:27:45,205 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:27:45,207 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:27:45,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:27:45,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1884671582, now seen corresponding path program 1 times [2018-10-24 16:27:45,216 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:27:45,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:27:45,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:45,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:27:45,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:27:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:27:45,841 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:27:45,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:27:45,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:27:45,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:27:45,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:27:45,868 INFO L87 Difference]: Start difference. First operand 246 states. Second operand 4 states. [2018-10-24 16:27:49,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:27:49,459 INFO L93 Difference]: Finished difference Result 854 states and 1562 transitions. [2018-10-24 16:27:49,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:27:49,461 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2018-10-24 16:27:49,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:27:49,487 INFO L225 Difference]: With dead ends: 854 [2018-10-24 16:27:49,487 INFO L226 Difference]: Without dead ends: 601 [2018-10-24 16:27:49,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:27:49,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2018-10-24 16:27:49,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2018-10-24 16:27:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2018-10-24 16:27:49,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 997 transitions. [2018-10-24 16:27:49,594 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 997 transitions. Word has length 53 [2018-10-24 16:27:49,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:27:49,595 INFO L481 AbstractCegarLoop]: Abstraction has 601 states and 997 transitions. [2018-10-24 16:27:49,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:27:49,595 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 997 transitions. [2018-10-24 16:27:49,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-24 16:27:49,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:27:49,602 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:27:49,602 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:27:49,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:27:49,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1961428045, now seen corresponding path program 1 times [2018-10-24 16:27:49,603 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:27:49,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:27:49,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:49,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:27:49,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:27:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:27:49,896 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:27:49,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:27:49,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:27:49,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:27:49,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:27:49,901 INFO L87 Difference]: Start difference. First operand 601 states and 997 transitions. Second operand 4 states. [2018-10-24 16:27:53,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:27:53,330 INFO L93 Difference]: Finished difference Result 2274 states and 3860 transitions. [2018-10-24 16:27:53,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:27:53,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2018-10-24 16:27:53,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:27:53,342 INFO L225 Difference]: With dead ends: 2274 [2018-10-24 16:27:53,342 INFO L226 Difference]: Without dead ends: 1675 [2018-10-24 16:27:53,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:27:53,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2018-10-24 16:27:53,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1675. [2018-10-24 16:27:53,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1675 states. [2018-10-24 16:27:53,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1675 states to 1675 states and 2493 transitions. [2018-10-24 16:27:53,424 INFO L78 Accepts]: Start accepts. Automaton has 1675 states and 2493 transitions. Word has length 120 [2018-10-24 16:27:53,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:27:53,424 INFO L481 AbstractCegarLoop]: Abstraction has 1675 states and 2493 transitions. [2018-10-24 16:27:53,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:27:53,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1675 states and 2493 transitions. [2018-10-24 16:27:53,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-24 16:27:53,428 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:27:53,428 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:27:53,428 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:27:53,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:27:53,429 INFO L82 PathProgramCache]: Analyzing trace with hash -910105896, now seen corresponding path program 1 times [2018-10-24 16:27:53,429 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:27:53,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:27:53,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:53,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:27:53,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:27:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:27:53,765 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:27:53,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:27:53,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:27:53,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:27:53,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:27:53,768 INFO L87 Difference]: Start difference. First operand 1675 states and 2493 transitions. Second operand 4 states. [2018-10-24 16:27:57,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:27:57,239 INFO L93 Difference]: Finished difference Result 5512 states and 8130 transitions. [2018-10-24 16:27:57,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:27:57,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2018-10-24 16:27:57,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:27:57,260 INFO L225 Difference]: With dead ends: 5512 [2018-10-24 16:27:57,260 INFO L226 Difference]: Without dead ends: 3839 [2018-10-24 16:27:57,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:27:57,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3839 states. [2018-10-24 16:27:57,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3839 to 3839. [2018-10-24 16:27:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3839 states. [2018-10-24 16:27:57,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3839 states to 3839 states and 5093 transitions. [2018-10-24 16:27:57,346 INFO L78 Accepts]: Start accepts. Automaton has 3839 states and 5093 transitions. Word has length 122 [2018-10-24 16:27:57,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:27:57,347 INFO L481 AbstractCegarLoop]: Abstraction has 3839 states and 5093 transitions. [2018-10-24 16:27:57,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:27:57,347 INFO L276 IsEmpty]: Start isEmpty. Operand 3839 states and 5093 transitions. [2018-10-24 16:27:57,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-24 16:27:57,352 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:27:57,352 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:27:57,353 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:27:57,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:27:57,353 INFO L82 PathProgramCache]: Analyzing trace with hash 467881856, now seen corresponding path program 1 times [2018-10-24 16:27:57,353 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:27:57,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:27:57,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:57,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:27:57,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:27:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 155 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-10-24 16:27:57,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:27:57,674 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:27:57,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:27:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:27:57,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:27:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-10-24 16:27:58,005 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:27:58,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-24 16:27:58,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 16:27:58,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 16:27:58,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:27:58,010 INFO L87 Difference]: Start difference. First operand 3839 states and 5093 transitions. Second operand 6 states. [2018-10-24 16:27:59,725 WARN L179 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-24 16:28:05,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:28:05,314 INFO L93 Difference]: Finished difference Result 12524 states and 16345 transitions. [2018-10-24 16:28:05,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 16:28:05,317 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 226 [2018-10-24 16:28:05,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:28:05,350 INFO L225 Difference]: With dead ends: 12524 [2018-10-24 16:28:05,351 INFO L226 Difference]: Without dead ends: 8326 [2018-10-24 16:28:05,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:28:05,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8326 states. [2018-10-24 16:28:05,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8326 to 5612. [2018-10-24 16:28:05,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5612 states. [2018-10-24 16:28:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5612 states to 5612 states and 6379 transitions. [2018-10-24 16:28:05,487 INFO L78 Accepts]: Start accepts. Automaton has 5612 states and 6379 transitions. Word has length 226 [2018-10-24 16:28:05,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:28:05,488 INFO L481 AbstractCegarLoop]: Abstraction has 5612 states and 6379 transitions. [2018-10-24 16:28:05,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 16:28:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand 5612 states and 6379 transitions. [2018-10-24 16:28:05,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-10-24 16:28:05,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:28:05,496 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:28:05,497 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:28:05,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:28:05,497 INFO L82 PathProgramCache]: Analyzing trace with hash 691767955, now seen corresponding path program 1 times [2018-10-24 16:28:05,498 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:28:05,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:28:05,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:05,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:05,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:05,867 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 16:28:06,143 WARN L179 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2018-10-24 16:28:06,471 WARN L179 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-24 16:28:06,973 WARN L179 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2018-10-24 16:28:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 300 proven. 46 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-10-24 16:28:07,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:28:07,292 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:28:07,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:07,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:28:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 323 proven. 23 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-10-24 16:28:07,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:28:07,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2018-10-24 16:28:07,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 16:28:07,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 16:28:07,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:28:07,736 INFO L87 Difference]: Start difference. First operand 5612 states and 6379 transitions. Second operand 9 states. [2018-10-24 16:28:12,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:28:12,015 INFO L93 Difference]: Finished difference Result 11302 states and 12838 transitions. [2018-10-24 16:28:12,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 16:28:12,016 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 360 [2018-10-24 16:28:12,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:28:12,039 INFO L225 Difference]: With dead ends: 11302 [2018-10-24 16:28:12,040 INFO L226 Difference]: Without dead ends: 5871 [2018-10-24 16:28:12,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 358 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:28:12,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5871 states. [2018-10-24 16:28:12,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5871 to 5612. [2018-10-24 16:28:12,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5612 states. [2018-10-24 16:28:12,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5612 states to 5612 states and 6376 transitions. [2018-10-24 16:28:12,129 INFO L78 Accepts]: Start accepts. Automaton has 5612 states and 6376 transitions. Word has length 360 [2018-10-24 16:28:12,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:28:12,130 INFO L481 AbstractCegarLoop]: Abstraction has 5612 states and 6376 transitions. [2018-10-24 16:28:12,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 16:28:12,130 INFO L276 IsEmpty]: Start isEmpty. Operand 5612 states and 6376 transitions. [2018-10-24 16:28:12,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2018-10-24 16:28:12,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:28:12,146 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:28:12,146 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:28:12,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:28:12,147 INFO L82 PathProgramCache]: Analyzing trace with hash 999632577, now seen corresponding path program 1 times [2018-10-24 16:28:12,147 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:28:12,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:28:12,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:12,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:12,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:12,800 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 16:28:13,025 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 16:28:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 808 proven. 201 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2018-10-24 16:28:13,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:28:13,856 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:28:13,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:14,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:28:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 715 proven. 93 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2018-10-24 16:28:14,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:28:14,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 9 [2018-10-24 16:28:14,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 16:28:14,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 16:28:14,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-10-24 16:28:14,764 INFO L87 Difference]: Start difference. First operand 5612 states and 6376 transitions. Second operand 10 states. [2018-10-24 16:28:18,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:28:18,432 INFO L93 Difference]: Finished difference Result 12014 states and 13756 transitions. [2018-10-24 16:28:18,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 16:28:18,432 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 580 [2018-10-24 16:28:18,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:28:18,452 INFO L225 Difference]: With dead ends: 12014 [2018-10-24 16:28:18,452 INFO L226 Difference]: Without dead ends: 6583 [2018-10-24 16:28:18,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-10-24 16:28:18,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2018-10-24 16:28:18,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 6507. [2018-10-24 16:28:18,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6507 states. [2018-10-24 16:28:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6507 states to 6507 states and 7414 transitions. [2018-10-24 16:28:18,563 INFO L78 Accepts]: Start accepts. Automaton has 6507 states and 7414 transitions. Word has length 580 [2018-10-24 16:28:18,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:28:18,564 INFO L481 AbstractCegarLoop]: Abstraction has 6507 states and 7414 transitions. [2018-10-24 16:28:18,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 16:28:18,564 INFO L276 IsEmpty]: Start isEmpty. Operand 6507 states and 7414 transitions. [2018-10-24 16:28:18,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2018-10-24 16:28:18,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:28:18,584 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:28:18,585 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:28:18,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:28:18,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1310166270, now seen corresponding path program 1 times [2018-10-24 16:28:18,585 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:28:18,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:28:18,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:18,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:18,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:19,176 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 8 [2018-10-24 16:28:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 533 proven. 0 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2018-10-24 16:28:19,294 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:28:19,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:28:19,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:28:19,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:28:19,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:28:19,296 INFO L87 Difference]: Start difference. First operand 6507 states and 7414 transitions. Second operand 4 states. [2018-10-24 16:28:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:28:21,064 INFO L93 Difference]: Finished difference Result 16055 states and 18465 transitions. [2018-10-24 16:28:21,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:28:21,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 606 [2018-10-24 16:28:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:28:21,091 INFO L225 Difference]: With dead ends: 16055 [2018-10-24 16:28:21,091 INFO L226 Difference]: Without dead ends: 9729 [2018-10-24 16:28:21,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:28:21,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9729 states. [2018-10-24 16:28:21,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9729 to 9729. [2018-10-24 16:28:21,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9729 states. [2018-10-24 16:28:21,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9729 states to 9729 states and 10858 transitions. [2018-10-24 16:28:21,345 INFO L78 Accepts]: Start accepts. Automaton has 9729 states and 10858 transitions. Word has length 606 [2018-10-24 16:28:21,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:28:21,346 INFO L481 AbstractCegarLoop]: Abstraction has 9729 states and 10858 transitions. [2018-10-24 16:28:21,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:28:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand 9729 states and 10858 transitions. [2018-10-24 16:28:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2018-10-24 16:28:21,359 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:28:21,359 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:28:21,360 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:28:21,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:28:21,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1589739572, now seen corresponding path program 1 times [2018-10-24 16:28:21,361 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:28:21,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:28:21,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:21,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:21,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:21,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 903 proven. 111 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2018-10-24 16:28:22,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:28:22,144 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:28:22,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:22,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:28:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 903 proven. 111 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2018-10-24 16:28:22,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:28:22,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2018-10-24 16:28:22,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:28:22,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:28:22,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:28:22,544 INFO L87 Difference]: Start difference. First operand 9729 states and 10858 transitions. Second operand 5 states. [2018-10-24 16:28:24,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:28:24,857 INFO L93 Difference]: Finished difference Result 23409 states and 26412 transitions. [2018-10-24 16:28:24,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:28:24,858 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 647 [2018-10-24 16:28:24,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:28:24,885 INFO L225 Difference]: With dead ends: 23409 [2018-10-24 16:28:24,885 INFO L226 Difference]: Without dead ends: 13861 [2018-10-24 16:28:24,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 649 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:28:24,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13861 states. [2018-10-24 16:28:25,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13861 to 12056. [2018-10-24 16:28:25,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12056 states. [2018-10-24 16:28:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12056 states to 12056 states and 13460 transitions. [2018-10-24 16:28:25,069 INFO L78 Accepts]: Start accepts. Automaton has 12056 states and 13460 transitions. Word has length 647 [2018-10-24 16:28:25,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:28:25,070 INFO L481 AbstractCegarLoop]: Abstraction has 12056 states and 13460 transitions. [2018-10-24 16:28:25,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:28:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand 12056 states and 13460 transitions. [2018-10-24 16:28:25,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 659 [2018-10-24 16:28:25,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:28:25,087 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:28:25,087 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:28:25,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:28:25,088 INFO L82 PathProgramCache]: Analyzing trace with hash -996298072, now seen corresponding path program 1 times [2018-10-24 16:28:25,088 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:28:25,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:28:25,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:25,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:25,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:25,577 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-24 16:28:25,839 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-24 16:28:26,114 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-10-24 16:28:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1608 backedges. 1240 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2018-10-24 16:28:26,567 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:28:26,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 16:28:26,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:28:26,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:28:26,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:28:26,568 INFO L87 Difference]: Start difference. First operand 12056 states and 13460 transitions. Second operand 5 states. [2018-10-24 16:28:29,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:28:29,189 INFO L93 Difference]: Finished difference Result 23931 states and 26738 transitions. [2018-10-24 16:28:29,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:28:29,190 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 658 [2018-10-24 16:28:29,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:28:29,213 INFO L225 Difference]: With dead ends: 23931 [2018-10-24 16:28:29,213 INFO L226 Difference]: Without dead ends: 12056 [2018-10-24 16:28:29,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:28:29,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12056 states. [2018-10-24 16:28:29,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12056 to 12056. [2018-10-24 16:28:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12056 states. [2018-10-24 16:28:29,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12056 states to 12056 states and 13300 transitions. [2018-10-24 16:28:29,370 INFO L78 Accepts]: Start accepts. Automaton has 12056 states and 13300 transitions. Word has length 658 [2018-10-24 16:28:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:28:29,371 INFO L481 AbstractCegarLoop]: Abstraction has 12056 states and 13300 transitions. [2018-10-24 16:28:29,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:28:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 12056 states and 13300 transitions. [2018-10-24 16:28:29,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 777 [2018-10-24 16:28:29,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:28:29,382 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:28:29,382 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:28:29,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:28:29,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1195887345, now seen corresponding path program 1 times [2018-10-24 16:28:29,382 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:28:29,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:28:29,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:29,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:29,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1779 backedges. 741 proven. 336 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2018-10-24 16:28:31,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:28:31,179 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:28:31,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:31,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:28:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1779 backedges. 654 proven. 0 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2018-10-24 16:28:32,565 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:28:32,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2018-10-24 16:28:32,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 16:28:32,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 16:28:32,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:28:32,566 INFO L87 Difference]: Start difference. First operand 12056 states and 13300 transitions. Second operand 12 states. [2018-10-24 16:28:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:28:38,656 INFO L93 Difference]: Finished difference Result 24067 states and 26592 transitions. [2018-10-24 16:28:38,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 16:28:38,656 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 776 [2018-10-24 16:28:38,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:28:38,678 INFO L225 Difference]: With dead ends: 24067 [2018-10-24 16:28:38,679 INFO L226 Difference]: Without dead ends: 11648 [2018-10-24 16:28:38,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 802 GetRequests, 775 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2018-10-24 16:28:38,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11648 states. [2018-10-24 16:28:38,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11648 to 11337. [2018-10-24 16:28:38,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11337 states. [2018-10-24 16:28:38,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11337 states to 11337 states and 12097 transitions. [2018-10-24 16:28:38,847 INFO L78 Accepts]: Start accepts. Automaton has 11337 states and 12097 transitions. Word has length 776 [2018-10-24 16:28:38,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:28:38,848 INFO L481 AbstractCegarLoop]: Abstraction has 11337 states and 12097 transitions. [2018-10-24 16:28:38,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 16:28:38,849 INFO L276 IsEmpty]: Start isEmpty. Operand 11337 states and 12097 transitions. [2018-10-24 16:28:38,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2018-10-24 16:28:38,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:28:38,860 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:28:38,860 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:28:38,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:28:38,860 INFO L82 PathProgramCache]: Analyzing trace with hash 960046082, now seen corresponding path program 1 times [2018-10-24 16:28:38,861 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:28:38,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:28:38,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:38,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:38,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2259 backedges. 941 proven. 0 refuted. 0 times theorem prover too weak. 1318 trivial. 0 not checked. [2018-10-24 16:28:39,770 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:28:39,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 16:28:39,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:28:39,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:28:39,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:28:39,771 INFO L87 Difference]: Start difference. First operand 11337 states and 12097 transitions. Second operand 5 states. [2018-10-24 16:28:41,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:28:41,419 INFO L93 Difference]: Finished difference Result 25193 states and 26920 transitions. [2018-10-24 16:28:41,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:28:41,420 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 816 [2018-10-24 16:28:41,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:28:41,441 INFO L225 Difference]: With dead ends: 25193 [2018-10-24 16:28:41,441 INFO L226 Difference]: Without dead ends: 13679 [2018-10-24 16:28:41,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:28:41,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13679 states. [2018-10-24 16:28:41,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13679 to 12418. [2018-10-24 16:28:41,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12418 states. [2018-10-24 16:28:41,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12418 states to 12418 states and 13267 transitions. [2018-10-24 16:28:41,593 INFO L78 Accepts]: Start accepts. Automaton has 12418 states and 13267 transitions. Word has length 816 [2018-10-24 16:28:41,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:28:41,594 INFO L481 AbstractCegarLoop]: Abstraction has 12418 states and 13267 transitions. [2018-10-24 16:28:41,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:28:41,594 INFO L276 IsEmpty]: Start isEmpty. Operand 12418 states and 13267 transitions. [2018-10-24 16:28:41,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 862 [2018-10-24 16:28:41,603 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:28:41,604 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:28:41,604 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:28:41,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:28:41,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1362996267, now seen corresponding path program 1 times [2018-10-24 16:28:41,605 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:28:41,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:28:41,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:41,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:41,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:42,301 WARN L179 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-10-24 16:28:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2292 backedges. 1287 proven. 0 refuted. 0 times theorem prover too weak. 1005 trivial. 0 not checked. [2018-10-24 16:28:42,688 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:28:42,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:28:42,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:28:42,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:28:42,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:28:42,690 INFO L87 Difference]: Start difference. First operand 12418 states and 13267 transitions. Second operand 4 states. [2018-10-24 16:28:44,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:28:44,136 INFO L93 Difference]: Finished difference Result 24112 states and 25776 transitions. [2018-10-24 16:28:44,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:28:44,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 861 [2018-10-24 16:28:44,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:28:44,151 INFO L225 Difference]: With dead ends: 24112 [2018-10-24 16:28:44,151 INFO L226 Difference]: Without dead ends: 11875 [2018-10-24 16:28:44,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:28:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11875 states. [2018-10-24 16:28:44,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11875 to 11875. [2018-10-24 16:28:44,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11875 states. [2018-10-24 16:28:44,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11875 states to 11875 states and 12547 transitions. [2018-10-24 16:28:44,311 INFO L78 Accepts]: Start accepts. Automaton has 11875 states and 12547 transitions. Word has length 861 [2018-10-24 16:28:44,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:28:44,312 INFO L481 AbstractCegarLoop]: Abstraction has 11875 states and 12547 transitions. [2018-10-24 16:28:44,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:28:44,312 INFO L276 IsEmpty]: Start isEmpty. Operand 11875 states and 12547 transitions. [2018-10-24 16:28:44,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 936 [2018-10-24 16:28:44,324 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:28:44,325 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:28:44,325 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:28:44,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:28:44,326 INFO L82 PathProgramCache]: Analyzing trace with hash -729599854, now seen corresponding path program 1 times [2018-10-24 16:28:44,326 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:28:44,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:28:44,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:44,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:44,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:45,153 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 16:28:45,521 WARN L179 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2018-10-24 16:28:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2541 backedges. 858 proven. 822 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-24 16:28:47,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:28:47,438 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:28:47,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:47,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:28:48,324 WARN L179 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2018-10-24 16:29:02,095 WARN L179 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 167 DAG size of output: 25 [2018-10-24 16:29:10,574 WARN L179 SmtUtils]: Spent 8.16 s on a formula simplification. DAG size of input: 236 DAG size of output: 63 [2018-10-24 16:29:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2541 backedges. 634 proven. 782 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2018-10-24 16:29:13,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:29:13,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2018-10-24 16:29:13,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 16:29:13,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 16:29:13,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=181, Unknown=4, NotChecked=0, Total=240 [2018-10-24 16:29:13,728 INFO L87 Difference]: Start difference. First operand 11875 states and 12547 transitions. Second operand 16 states. [2018-10-24 16:29:16,183 WARN L179 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2018-10-24 16:29:17,575 WARN L179 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2018-10-24 16:29:19,487 WARN L179 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2018-10-24 16:31:30,807 WARN L179 SmtUtils]: Spent 9.20 s on a formula simplification. DAG size of input: 68 DAG size of output: 66 Received shutdown request... [2018-10-24 16:31:54,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 16:31:54,529 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:31:54,535 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:31:54,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:31:54 BoogieIcfgContainer [2018-10-24 16:31:54,536 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:31:54,537 INFO L168 Benchmark]: Toolchain (without parser) took 254570.81 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -817.2 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-10-24 16:31:54,538 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 16:31:54,538 INFO L168 Benchmark]: CACSL2BoogieTranslator took 813.42 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-10-24 16:31:54,539 INFO L168 Benchmark]: Boogie Procedure Inliner took 235.47 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 721.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -820.5 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2018-10-24 16:31:54,540 INFO L168 Benchmark]: Boogie Preprocessor took 105.59 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2018-10-24 16:31:54,543 INFO L168 Benchmark]: RCFGBuilder took 3912.20 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 131.5 MB). Peak memory consumption was 131.5 MB. Max. memory is 7.1 GB. [2018-10-24 16:31:54,544 INFO L168 Benchmark]: TraceAbstraction took 249498.95 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 2.2 GB in the end (delta: -194.7 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-24 16:31:54,551 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 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 813.42 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 235.47 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 721.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -820.5 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.59 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3912.20 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 131.5 MB). Peak memory consumption was 131.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 249498.95 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 2.2 GB in the end (delta: -194.7 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 160]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 160). Cancelled while BasicCegarLoop was constructing difference of abstraction (11875states) and FLOYD_HOARE automaton (currently 12 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (2593 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 246 locations, 1 error locations. TIMEOUT Result, 249.4s OverallTime, 13 OverallIterations, 8 TraceHistogramMax, 202.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1997 SDtfs, 10664 SDslu, 2013 SDs, 0 SdLazy, 23685 SolverSat, 3101 SolverUnsat, 205 SolverUnknown, 0 SolverNotchecked, 179.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3636 GetRequests, 3532 SyntacticMatches, 13 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 44.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12418occurred in iteration=11, 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: 1.5s AutomataMinimizationTime, 12 MinimizatonAttempts, 6426 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 37.4s InterpolantComputationTime, 10284 NumberOfCodeBlocks, 10284 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 10265 ConstructedInterpolants, 121 QuantifiedInterpolants, 42980942 SizeOfPredicates, 13 NumberOfNonLiveVariables, 4378 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 19 InterpolantComputations, 9 PerfectInterpolantSequences, 19715/22245 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown