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/Problem18_label06_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 18:32:08,961 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 18:32:08,964 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 18:32:08,981 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 18:32:08,982 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 18:32:08,983 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 18:32:08,985 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 18:32:08,987 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 18:32:08,990 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 18:32:08,990 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 18:32:08,992 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 18:32:08,992 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 18:32:08,993 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 18:32:08,994 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 18:32:09,003 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 18:32:09,004 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 18:32:09,005 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 18:32:09,008 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 18:32:09,014 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 18:32:09,018 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 18:32:09,019 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 18:32:09,020 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 18:32:09,024 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 18:32:09,025 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 18:32:09,025 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 18:32:09,026 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 18:32:09,027 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 18:32:09,028 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 18:32:09,028 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 18:32:09,030 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 18:32:09,031 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 18:32:09,032 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-23 18:32:09,034 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 18:32:09,055 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 18:32:09,055 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 18:32:09,056 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 18:32:09,056 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 18:32:09,057 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 18:32:09,057 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 18:32:09,057 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 18:32:09,058 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 18:32:09,058 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 18:32:09,058 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 18:32:09,058 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 18:32:09,058 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 18:32:09,059 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 18:32:09,059 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 18:32:09,059 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 18:32:09,059 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 18:32:09,059 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 18:32:09,059 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 18:32:09,060 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 18:32:09,060 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 18:32:09,060 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 18:32:09,060 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 18:32:09,060 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 18:32:09,061 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 18:32:09,061 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 18:32:09,061 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 18:32:09,061 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 18:32:09,061 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 18:32:09,105 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 18:32:09,120 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 18:32:09,124 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 18:32:09,125 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 18:32:09,126 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 18:32:09,126 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label06_false-unreach-call.c [2018-10-23 18:32:09,200 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/17efa51d4/4b46d34b07ff4d69a2edf87b3e5efab7/FLAGa3b753a9c [2018-10-23 18:32:09,938 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 18:32:09,939 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label06_false-unreach-call.c [2018-10-23 18:32:09,968 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/17efa51d4/4b46d34b07ff4d69a2edf87b3e5efab7/FLAGa3b753a9c [2018-10-23 18:32:09,988 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/17efa51d4/4b46d34b07ff4d69a2edf87b3e5efab7 [2018-10-23 18:32:10,003 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 18:32:10,005 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 18:32:10,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 18:32:10,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 18:32:10,012 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 18:32:10,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:32:09" (1/1) ... [2018-10-23 18:32:10,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3829398b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:32:10, skipping insertion in model container [2018-10-23 18:32:10,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:32:09" (1/1) ... [2018-10-23 18:32:10,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 18:32:10,174 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 18:32:11,385 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 18:32:11,389 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 18:32:11,801 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 18:32:11,833 INFO L193 MainTranslator]: Completed translation [2018-10-23 18:32:11,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:32:11 WrapperNode [2018-10-23 18:32:11,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 18:32:11,834 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 18:32:11,835 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 18:32:11,838 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 18:32:11,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:32:11" (1/1) ... [2018-10-23 18:32:11,923 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:32:11" (1/1) ... [2018-10-23 18:32:12,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 18:32:12,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 18:32:12,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 18:32:12,318 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 18:32:12,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:32:11" (1/1) ... [2018-10-23 18:32:12,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:32:11" (1/1) ... [2018-10-23 18:32:12,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:32:11" (1/1) ... [2018-10-23 18:32:12,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:32:11" (1/1) ... [2018-10-23 18:32:12,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:32:11" (1/1) ... [2018-10-23 18:32:12,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:32:11" (1/1) ... [2018-10-23 18:32:12,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:32:11" (1/1) ... [2018-10-23 18:32:12,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 18:32:12,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 18:32:12,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 18:32:12,570 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 18:32:12,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:32:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 18:32:12,645 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 18:32:12,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 18:32:12,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 18:32:19,961 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 18:32:19,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:32:19 BoogieIcfgContainer [2018-10-23 18:32:19,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 18:32:19,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 18:32:19,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 18:32:19,971 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 18:32:19,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:32:09" (1/3) ... [2018-10-23 18:32:19,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56d60217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:32:19, skipping insertion in model container [2018-10-23 18:32:19,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:32:11" (2/3) ... [2018-10-23 18:32:19,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56d60217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:32:19, skipping insertion in model container [2018-10-23 18:32:19,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:32:19" (3/3) ... [2018-10-23 18:32:19,977 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label06_false-unreach-call.c [2018-10-23 18:32:19,986 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 18:32:19,996 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 18:32:20,016 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 18:32:20,070 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 18:32:20,071 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 18:32:20,071 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 18:32:20,071 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 18:32:20,071 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 18:32:20,071 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 18:32:20,071 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 18:32:20,072 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 18:32:20,072 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 18:32:20,106 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states. [2018-10-23 18:32:20,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-23 18:32:20,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:32:20,115 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] [2018-10-23 18:32:20,117 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:32:20,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:32:20,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1580163962, now seen corresponding path program 1 times [2018-10-23 18:32:20,126 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:32:20,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:32:20,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:32:20,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:32:20,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:32:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:32:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:32:20,598 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:32:20,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:32:20,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:32:20,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:32:20,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:32:20,624 INFO L87 Difference]: Start difference. First operand 758 states. Second operand 4 states. [2018-10-23 18:32:31,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:32:31,387 INFO L93 Difference]: Finished difference Result 2902 states and 5650 transitions. [2018-10-23 18:32:31,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:32:31,390 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2018-10-23 18:32:31,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:32:31,434 INFO L225 Difference]: With dead ends: 2902 [2018-10-23 18:32:31,434 INFO L226 Difference]: Without dead ends: 2137 [2018-10-23 18:32:31,442 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 [2018-10-23 18:32:31,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2018-10-23 18:32:31,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 2137. [2018-10-23 18:32:31,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2137 states. [2018-10-23 18:32:31,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 3734 transitions. [2018-10-23 18:32:31,603 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 3734 transitions. Word has length 26 [2018-10-23 18:32:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:32:31,604 INFO L481 AbstractCegarLoop]: Abstraction has 2137 states and 3734 transitions. [2018-10-23 18:32:31,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:32:31,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 3734 transitions. [2018-10-23 18:32:31,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-23 18:32:31,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:32:31,611 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:32:31,611 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:32:31,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:32:31,611 INFO L82 PathProgramCache]: Analyzing trace with hash -7220096, now seen corresponding path program 1 times [2018-10-23 18:32:31,611 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:32:31,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:32:31,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:32:31,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:32:31,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:32:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:32:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:32:32,104 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:32:32,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:32:32,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:32:32,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:32:32,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:32:32,107 INFO L87 Difference]: Start difference. First operand 2137 states and 3734 transitions. Second operand 4 states. [2018-10-23 18:32:44,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:32:44,684 INFO L93 Difference]: Finished difference Result 7730 states and 13074 transitions. [2018-10-23 18:32:44,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 18:32:44,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2018-10-23 18:32:44,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:32:44,715 INFO L225 Difference]: With dead ends: 7730 [2018-10-23 18:32:44,716 INFO L226 Difference]: Without dead ends: 5595 [2018-10-23 18:32:44,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:32:44,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5595 states. [2018-10-23 18:32:44,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5595 to 5595. [2018-10-23 18:32:44,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5595 states. [2018-10-23 18:32:44,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5595 states to 5595 states and 8527 transitions. [2018-10-23 18:32:44,820 INFO L78 Accepts]: Start accepts. Automaton has 5595 states and 8527 transitions. Word has length 96 [2018-10-23 18:32:44,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:32:44,821 INFO L481 AbstractCegarLoop]: Abstraction has 5595 states and 8527 transitions. [2018-10-23 18:32:44,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:32:44,821 INFO L276 IsEmpty]: Start isEmpty. Operand 5595 states and 8527 transitions. [2018-10-23 18:32:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-23 18:32:44,827 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:32:44,828 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:32:44,828 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:32:44,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:32:44,829 INFO L82 PathProgramCache]: Analyzing trace with hash 10279458, now seen corresponding path program 1 times [2018-10-23 18:32:44,829 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:32:44,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:32:44,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:32:44,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:32:44,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:32:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:32:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:32:45,794 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:32:45,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:32:45,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 18:32:45,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 18:32:45,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:32:45,795 INFO L87 Difference]: Start difference. First operand 5595 states and 8527 transitions. Second operand 5 states. [2018-10-23 18:32:54,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:32:54,123 INFO L93 Difference]: Finished difference Result 16025 states and 24804 transitions. [2018-10-23 18:32:54,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 18:32:54,124 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2018-10-23 18:32:54,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:32:54,169 INFO L225 Difference]: With dead ends: 16025 [2018-10-23 18:32:54,170 INFO L226 Difference]: Without dead ends: 10432 [2018-10-23 18:32:54,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 18:32:54,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10432 states. [2018-10-23 18:32:54,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10432 to 9741. [2018-10-23 18:32:54,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9741 states. [2018-10-23 18:32:54,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9741 states to 9741 states and 13118 transitions. [2018-10-23 18:32:54,363 INFO L78 Accepts]: Start accepts. Automaton has 9741 states and 13118 transitions. Word has length 145 [2018-10-23 18:32:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:32:54,364 INFO L481 AbstractCegarLoop]: Abstraction has 9741 states and 13118 transitions. [2018-10-23 18:32:54,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 18:32:54,365 INFO L276 IsEmpty]: Start isEmpty. Operand 9741 states and 13118 transitions. [2018-10-23 18:32:54,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-10-23 18:32:54,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:32:54,372 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:32:54,372 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:32:54,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:32:54,377 INFO L82 PathProgramCache]: Analyzing trace with hash 315138893, now seen corresponding path program 1 times [2018-10-23 18:32:54,377 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:32:54,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:32:54,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:32:54,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:32:54,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:32:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:32:54,856 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-23 18:32:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 115 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:32:55,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:32:55,014 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:32:55,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:32:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:32:55,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:32:55,218 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:32:55,240 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:32:55,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-23 18:32:55,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 18:32:55,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 18:32:55,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 18:32:55,242 INFO L87 Difference]: Start difference. First operand 9741 states and 13118 transitions. Second operand 6 states. [2018-10-23 18:33:08,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:33:08,527 INFO L93 Difference]: Finished difference Result 34002 states and 48836 transitions. [2018-10-23 18:33:08,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 18:33:08,528 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 282 [2018-10-23 18:33:08,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:33:08,599 INFO L225 Difference]: With dead ends: 34002 [2018-10-23 18:33:08,600 INFO L226 Difference]: Without dead ends: 23570 [2018-10-23 18:33:08,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 282 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-23 18:33:08,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23570 states. [2018-10-23 18:33:08,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23570 to 17339. [2018-10-23 18:33:08,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17339 states. [2018-10-23 18:33:08,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17339 states to 17339 states and 19653 transitions. [2018-10-23 18:33:08,948 INFO L78 Accepts]: Start accepts. Automaton has 17339 states and 19653 transitions. Word has length 282 [2018-10-23 18:33:08,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:33:08,949 INFO L481 AbstractCegarLoop]: Abstraction has 17339 states and 19653 transitions. [2018-10-23 18:33:08,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 18:33:08,949 INFO L276 IsEmpty]: Start isEmpty. Operand 17339 states and 19653 transitions. [2018-10-23 18:33:08,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2018-10-23 18:33:08,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:33:08,986 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:33:08,987 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:33:08,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:33:08,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1265390655, now seen corresponding path program 1 times [2018-10-23 18:33:08,988 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:33:08,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:33:08,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:33:08,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:33:08,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:33:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:33:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2018-10-23 18:33:10,191 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:33:10,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:33:10,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:33:10,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:33:10,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:33:10,194 INFO L87 Difference]: Start difference. First operand 17339 states and 19653 transitions. Second operand 4 states. [2018-10-23 18:33:18,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:33:18,279 INFO L93 Difference]: Finished difference Result 43673 states and 51516 transitions. [2018-10-23 18:33:18,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:33:18,280 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 915 [2018-10-23 18:33:18,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:33:18,331 INFO L225 Difference]: With dead ends: 43673 [2018-10-23 18:33:18,331 INFO L226 Difference]: Without dead ends: 27027 [2018-10-23 18:33:18,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:33:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27027 states. [2018-10-23 18:33:18,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27027 to 26336. [2018-10-23 18:33:18,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26336 states. [2018-10-23 18:33:18,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26336 states to 26336 states and 30312 transitions. [2018-10-23 18:33:18,680 INFO L78 Accepts]: Start accepts. Automaton has 26336 states and 30312 transitions. Word has length 915 [2018-10-23 18:33:18,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:33:18,682 INFO L481 AbstractCegarLoop]: Abstraction has 26336 states and 30312 transitions. [2018-10-23 18:33:18,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:33:18,682 INFO L276 IsEmpty]: Start isEmpty. Operand 26336 states and 30312 transitions. [2018-10-23 18:33:18,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1047 [2018-10-23 18:33:18,721 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:33:18,722 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:33:18,722 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:33:18,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:33:18,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1742992509, now seen corresponding path program 1 times [2018-10-23 18:33:18,723 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:33:18,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:33:18,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:33:18,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:33:18,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:33:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:33:19,568 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 18:33:19,730 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2018-10-23 18:33:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 299 proven. 500 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-10-23 18:33:21,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:33:21,672 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:33:21,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:33:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:33:21,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:33:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2018-10-23 18:33:22,966 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:33:22,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 10 [2018-10-23 18:33:22,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 18:33:22,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 18:33:22,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-23 18:33:22,969 INFO L87 Difference]: Start difference. First operand 26336 states and 30312 transitions. Second operand 10 states. [2018-10-23 18:33:47,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:33:47,165 INFO L93 Difference]: Finished difference Result 187461 states and 225774 transitions. [2018-10-23 18:33:47,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-23 18:33:47,166 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1046 [2018-10-23 18:33:47,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:33:47,436 INFO L225 Difference]: With dead ends: 187461 [2018-10-23 18:33:47,436 INFO L226 Difference]: Without dead ends: 161818 [2018-10-23 18:33:47,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1096 GetRequests, 1067 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2018-10-23 18:33:47,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161818 states. [2018-10-23 18:33:48,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161818 to 65032. [2018-10-23 18:33:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65032 states. [2018-10-23 18:33:48,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65032 states to 65032 states and 71486 transitions. [2018-10-23 18:33:48,707 INFO L78 Accepts]: Start accepts. Automaton has 65032 states and 71486 transitions. Word has length 1046 [2018-10-23 18:33:48,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:33:48,709 INFO L481 AbstractCegarLoop]: Abstraction has 65032 states and 71486 transitions. [2018-10-23 18:33:48,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 18:33:48,709 INFO L276 IsEmpty]: Start isEmpty. Operand 65032 states and 71486 transitions. [2018-10-23 18:33:48,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1068 [2018-10-23 18:33:48,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:33:48,762 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:33:48,762 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:33:48,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:33:48,763 INFO L82 PathProgramCache]: Analyzing trace with hash -633946417, now seen corresponding path program 1 times [2018-10-23 18:33:48,763 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:33:48,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:33:48,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:33:48,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:33:48,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:33:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:33:49,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2018-10-23 18:33:49,880 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:33:49,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:33:49,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:33:49,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:33:49,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:33:49,882 INFO L87 Difference]: Start difference. First operand 65032 states and 71486 transitions. Second operand 4 states. [2018-10-23 18:33:55,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:33:55,119 INFO L93 Difference]: Finished difference Result 140413 states and 156529 transitions. [2018-10-23 18:33:55,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:33:55,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1067 [2018-10-23 18:33:55,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:33:55,224 INFO L225 Difference]: With dead ends: 140413 [2018-10-23 18:33:55,224 INFO L226 Difference]: Without dead ends: 76074 [2018-10-23 18:33:55,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:33:55,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76074 states. [2018-10-23 18:33:55,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76074 to 72619. [2018-10-23 18:33:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72619 states. [2018-10-23 18:33:55,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72619 states to 72619 states and 78010 transitions. [2018-10-23 18:33:55,912 INFO L78 Accepts]: Start accepts. Automaton has 72619 states and 78010 transitions. Word has length 1067 [2018-10-23 18:33:55,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:33:55,913 INFO L481 AbstractCegarLoop]: Abstraction has 72619 states and 78010 transitions. [2018-10-23 18:33:55,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:33:55,914 INFO L276 IsEmpty]: Start isEmpty. Operand 72619 states and 78010 transitions. [2018-10-23 18:33:56,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1509 [2018-10-23 18:33:56,001 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:33:56,002 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:33:56,003 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:33:56,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:33:56,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1575986019, now seen corresponding path program 1 times [2018-10-23 18:33:56,004 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:33:56,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:33:56,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:33:56,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:33:56,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:33:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:33:56,730 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2018-10-23 18:33:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1813 backedges. 1317 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2018-10-23 18:33:57,856 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:33:57,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:33:57,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:33:57,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:33:57,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:33:57,858 INFO L87 Difference]: Start difference. First operand 72619 states and 78010 transitions. Second operand 4 states. [2018-10-23 18:34:04,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:34:04,062 INFO L93 Difference]: Finished difference Result 189460 states and 203780 transitions. [2018-10-23 18:34:04,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:34:04,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1508 [2018-10-23 18:34:04,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:34:04,195 INFO L225 Difference]: With dead ends: 189460 [2018-10-23 18:34:04,195 INFO L226 Difference]: Without dead ends: 117534 [2018-10-23 18:34:04,249 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 [2018-10-23 18:34:04,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117534 states. [2018-10-23 18:34:05,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117534 to 111315. [2018-10-23 18:34:05,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111315 states. [2018-10-23 18:34:05,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111315 states to 111315 states and 118479 transitions. [2018-10-23 18:34:05,144 INFO L78 Accepts]: Start accepts. Automaton has 111315 states and 118479 transitions. Word has length 1508 [2018-10-23 18:34:05,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:34:05,145 INFO L481 AbstractCegarLoop]: Abstraction has 111315 states and 118479 transitions. [2018-10-23 18:34:05,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:34:05,146 INFO L276 IsEmpty]: Start isEmpty. Operand 111315 states and 118479 transitions. [2018-10-23 18:34:05,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1561 [2018-10-23 18:34:05,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:34:05,211 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:34:05,211 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:34:05,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:34:05,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1587940758, now seen corresponding path program 1 times [2018-10-23 18:34:05,212 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:34:05,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:34:05,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:34:05,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:34:05,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:34:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:34:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1160 proven. 0 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2018-10-23 18:34:07,741 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:34:07,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:34:07,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:34:07,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:34:07,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:34:07,743 INFO L87 Difference]: Start difference. First operand 111315 states and 118479 transitions. Second operand 4 states. [2018-10-23 18:34:13,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:34:13,088 INFO L93 Difference]: Finished difference Result 233684 states and 248891 transitions. [2018-10-23 18:34:13,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:34:13,088 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1560 [2018-10-23 18:34:13,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:34:13,205 INFO L225 Difference]: With dead ends: 233684 [2018-10-23 18:34:13,206 INFO L226 Difference]: Without dead ends: 110601 [2018-10-23 18:34:13,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:34:13,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110601 states. [2018-10-23 18:34:14,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110601 to 109910. [2018-10-23 18:34:14,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109910 states. [2018-10-23 18:34:14,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109910 states to 109910 states and 114343 transitions. [2018-10-23 18:34:14,161 INFO L78 Accepts]: Start accepts. Automaton has 109910 states and 114343 transitions. Word has length 1560 [2018-10-23 18:34:14,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:34:14,162 INFO L481 AbstractCegarLoop]: Abstraction has 109910 states and 114343 transitions. [2018-10-23 18:34:14,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:34:14,163 INFO L276 IsEmpty]: Start isEmpty. Operand 109910 states and 114343 transitions. [2018-10-23 18:34:14,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1723 [2018-10-23 18:34:14,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:34:14,239 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:34:14,239 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:34:14,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:34:14,240 INFO L82 PathProgramCache]: Analyzing trace with hash 457997503, now seen corresponding path program 1 times [2018-10-23 18:34:14,240 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:34:14,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:34:14,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:34:14,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:34:14,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:34:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:34:16,121 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-23 18:34:16,312 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-10-23 18:34:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2615 backedges. 1515 proven. 1008 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-10-23 18:34:20,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:34:20,138 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:34:20,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:34:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:34:20,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:34:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2615 backedges. 1916 proven. 0 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2018-10-23 18:34:22,399 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:34:22,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2018-10-23 18:34:22,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 18:34:22,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 18:34:22,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-10-23 18:34:22,402 INFO L87 Difference]: Start difference. First operand 109910 states and 114343 transitions. Second operand 12 states. [2018-10-23 18:34:41,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:34:41,094 INFO L93 Difference]: Finished difference Result 259926 states and 270554 transitions. [2018-10-23 18:34:41,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-23 18:34:41,095 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1722 [2018-10-23 18:34:41,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:34:41,260 INFO L225 Difference]: With dead ends: 259926 [2018-10-23 18:34:41,261 INFO L226 Difference]: Without dead ends: 150709 [2018-10-23 18:34:41,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1781 GetRequests, 1743 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2018-10-23 18:34:41,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150709 states. [2018-10-23 18:34:42,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150709 to 103691. [2018-10-23 18:34:42,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103691 states. [2018-10-23 18:34:42,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103691 states to 103691 states and 106149 transitions. [2018-10-23 18:34:42,436 INFO L78 Accepts]: Start accepts. Automaton has 103691 states and 106149 transitions. Word has length 1722 [2018-10-23 18:34:42,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:34:42,437 INFO L481 AbstractCegarLoop]: Abstraction has 103691 states and 106149 transitions. [2018-10-23 18:34:42,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-23 18:34:42,437 INFO L276 IsEmpty]: Start isEmpty. Operand 103691 states and 106149 transitions. [2018-10-23 18:34:42,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1793 [2018-10-23 18:34:42,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:34:42,766 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:34:42,766 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:34:42,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:34:42,767 INFO L82 PathProgramCache]: Analyzing trace with hash 603042489, now seen corresponding path program 1 times [2018-10-23 18:34:42,767 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:34:42,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:34:42,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:34:42,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:34:42,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:34:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:34:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3056 backedges. 2287 proven. 70 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2018-10-23 18:34:45,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:34:45,708 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:34:45,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:34:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:34:46,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:34:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3056 backedges. 2287 proven. 70 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2018-10-23 18:34:47,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 18:34:47,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-23 18:34:47,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:34:47,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:34:47,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:34:47,655 INFO L87 Difference]: Start difference. First operand 103691 states and 106149 transitions. Second operand 4 states. [2018-10-23 18:34:56,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:34:56,363 INFO L93 Difference]: Finished difference Result 220508 states and 225864 transitions. [2018-10-23 18:34:56,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:34:56,363 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1792 [2018-10-23 18:34:56,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:34:56,469 INFO L225 Difference]: With dead ends: 220508 [2018-10-23 18:34:56,469 INFO L226 Difference]: Without dead ends: 117510 [2018-10-23 18:34:56,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1796 GetRequests, 1792 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:34:56,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117510 states. [2018-10-23 18:34:57,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117510 to 109218. [2018-10-23 18:34:57,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109218 states. [2018-10-23 18:34:57,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109218 states to 109218 states and 111760 transitions. [2018-10-23 18:34:57,444 INFO L78 Accepts]: Start accepts. Automaton has 109218 states and 111760 transitions. Word has length 1792 [2018-10-23 18:34:57,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:34:57,445 INFO L481 AbstractCegarLoop]: Abstraction has 109218 states and 111760 transitions. [2018-10-23 18:34:57,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:34:57,445 INFO L276 IsEmpty]: Start isEmpty. Operand 109218 states and 111760 transitions. [2018-10-23 18:34:57,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1884 [2018-10-23 18:34:57,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:34:57,514 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:34:57,515 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:34:57,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:34:57,515 INFO L82 PathProgramCache]: Analyzing trace with hash -491800528, now seen corresponding path program 1 times [2018-10-23 18:34:57,516 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:34:57,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:34:57,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:34:57,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:34:57,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:34:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:34:58,582 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-23 18:35:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 2118 proven. 0 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2018-10-23 18:35:00,171 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:35:00,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:35:00,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:35:00,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:35:00,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:35:00,173 INFO L87 Difference]: Start difference. First operand 109218 states and 111760 transitions. Second operand 4 states. [2018-10-23 18:35:05,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:35:05,527 INFO L93 Difference]: Finished difference Result 226721 states and 232101 transitions. [2018-10-23 18:35:05,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:35:05,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1883 [2018-10-23 18:35:05,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:35:05,854 INFO L225 Difference]: With dead ends: 226721 [2018-10-23 18:35:05,854 INFO L226 Difference]: Without dead ends: 118196 [2018-10-23 18:35:05,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:35:05,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118196 states. [2018-10-23 18:35:06,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118196 to 114050. [2018-10-23 18:35:06,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114050 states. [2018-10-23 18:35:06,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114050 states to 114050 states and 116141 transitions. [2018-10-23 18:35:06,758 INFO L78 Accepts]: Start accepts. Automaton has 114050 states and 116141 transitions. Word has length 1883 [2018-10-23 18:35:06,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:35:06,759 INFO L481 AbstractCegarLoop]: Abstraction has 114050 states and 116141 transitions. [2018-10-23 18:35:06,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:35:06,759 INFO L276 IsEmpty]: Start isEmpty. Operand 114050 states and 116141 transitions. [2018-10-23 18:35:06,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2006 [2018-10-23 18:35:06,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:35:06,827 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:35:06,827 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:35:06,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:35:06,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1803355823, now seen corresponding path program 1 times [2018-10-23 18:35:06,828 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:35:06,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:35:06,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:35:06,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:35:06,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:35:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:35:07,990 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2018-10-23 18:35:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3874 backedges. 2455 proven. 0 refuted. 0 times theorem prover too weak. 1419 trivial. 0 not checked. [2018-10-23 18:35:09,779 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:35:09,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:35:09,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:35:09,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:35:09,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:35:09,781 INFO L87 Difference]: Start difference. First operand 114050 states and 116141 transitions. Second operand 4 states. [2018-10-23 18:35:15,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:35:15,064 INFO L93 Difference]: Finished difference Result 232932 states and 237209 transitions. [2018-10-23 18:35:15,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:35:15,068 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 2005 [2018-10-23 18:35:15,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:35:15,187 INFO L225 Difference]: With dead ends: 232932 [2018-10-23 18:35:15,187 INFO L226 Difference]: Without dead ends: 119575 [2018-10-23 18:35:15,232 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 [2018-10-23 18:35:15,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119575 states. [2018-10-23 18:35:16,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119575 to 110592. [2018-10-23 18:35:16,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110592 states. [2018-10-23 18:35:16,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110592 states to 110592 states and 112471 transitions. [2018-10-23 18:35:16,203 INFO L78 Accepts]: Start accepts. Automaton has 110592 states and 112471 transitions. Word has length 2005 [2018-10-23 18:35:16,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:35:16,204 INFO L481 AbstractCegarLoop]: Abstraction has 110592 states and 112471 transitions. [2018-10-23 18:35:16,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:35:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand 110592 states and 112471 transitions. [2018-10-23 18:35:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2124 [2018-10-23 18:35:16,280 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:35:16,281 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:35:16,282 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:35:16,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:35:16,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1319634156, now seen corresponding path program 1 times [2018-10-23 18:35:16,283 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:35:16,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:35:16,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:35:16,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:35:16,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:35:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:35:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4011 backedges. 3146 proven. 0 refuted. 0 times theorem prover too weak. 865 trivial. 0 not checked. [2018-10-23 18:35:19,387 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:35:19,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:35:19,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:35:19,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:35:19,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:35:19,389 INFO L87 Difference]: Start difference. First operand 110592 states and 112471 transitions. Second operand 4 states. [2018-10-23 18:35:24,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:35:24,400 INFO L93 Difference]: Finished difference Result 243293 states and 247474 transitions. [2018-10-23 18:35:24,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:35:24,401 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 2123 [2018-10-23 18:35:24,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:35:24,526 INFO L225 Difference]: With dead ends: 243293 [2018-10-23 18:35:24,526 INFO L226 Difference]: Without dead ends: 133394 [2018-10-23 18:35:24,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:35:24,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133394 states. [2018-10-23 18:35:25,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133394 to 127864. [2018-10-23 18:35:25,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127864 states. [2018-10-23 18:35:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127864 states to 127864 states and 129776 transitions. [2018-10-23 18:35:25,702 INFO L78 Accepts]: Start accepts. Automaton has 127864 states and 129776 transitions. Word has length 2123 [2018-10-23 18:35:25,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:35:25,703 INFO L481 AbstractCegarLoop]: Abstraction has 127864 states and 129776 transitions. [2018-10-23 18:35:25,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:35:25,703 INFO L276 IsEmpty]: Start isEmpty. Operand 127864 states and 129776 transitions. [2018-10-23 18:35:25,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2174 [2018-10-23 18:35:25,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:35:25,779 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:35:25,779 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:35:25,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:35:25,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1779036097, now seen corresponding path program 1 times [2018-10-23 18:35:25,780 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:35:25,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:35:25,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:35:25,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:35:25,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:35:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:35:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4227 backedges. 2540 proven. 174 refuted. 0 times theorem prover too weak. 1513 trivial. 0 not checked. [2018-10-23 18:35:29,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:35:29,389 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:35:29,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:35:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:35:29,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:35:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4227 backedges. 2540 proven. 174 refuted. 0 times theorem prover too weak. 1513 trivial. 0 not checked. [2018-10-23 18:35:31,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 18:35:31,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-23 18:35:31,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:35:31,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:35:31,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:35:31,942 INFO L87 Difference]: Start difference. First operand 127864 states and 129776 transitions. Second operand 4 states. [2018-10-23 18:35:38,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:35:38,991 INFO L93 Difference]: Finished difference Result 257108 states and 260965 transitions. [2018-10-23 18:35:38,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 18:35:38,991 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 2173 [2018-10-23 18:35:38,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:35:39,114 INFO L225 Difference]: With dead ends: 257108 [2018-10-23 18:35:39,114 INFO L226 Difference]: Without dead ends: 129937 [2018-10-23 18:35:39,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2177 GetRequests, 2173 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:35:39,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129937 states. [2018-10-23 18:35:40,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129937 to 120263. [2018-10-23 18:35:40,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120263 states. [2018-10-23 18:35:40,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120263 states to 120263 states and 121949 transitions. [2018-10-23 18:35:40,164 INFO L78 Accepts]: Start accepts. Automaton has 120263 states and 121949 transitions. Word has length 2173 [2018-10-23 18:35:40,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:35:40,165 INFO L481 AbstractCegarLoop]: Abstraction has 120263 states and 121949 transitions. [2018-10-23 18:35:40,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:35:40,165 INFO L276 IsEmpty]: Start isEmpty. Operand 120263 states and 121949 transitions. [2018-10-23 18:35:40,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2285 [2018-10-23 18:35:40,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:35:40,240 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:35:40,241 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:35:40,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:35:40,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1433622822, now seen corresponding path program 1 times [2018-10-23 18:35:40,242 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:35:40,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:35:40,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:35:40,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:35:40,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:35:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:35:41,913 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 3 [2018-10-23 18:35:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4947 backedges. 3143 proven. 0 refuted. 0 times theorem prover too weak. 1804 trivial. 0 not checked. [2018-10-23 18:35:47,454 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:35:47,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 18:35:47,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 18:35:47,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 18:35:47,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:35:47,457 INFO L87 Difference]: Start difference. First operand 120263 states and 121949 transitions. Second operand 5 states. Received shutdown request... [2018-10-23 18:35:55,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 18:35:55,452 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 18:35:55,458 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 18:35:55,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:35:55 BoogieIcfgContainer [2018-10-23 18:35:55,458 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 18:35:55,459 INFO L168 Benchmark]: Toolchain (without parser) took 225455.43 ms. Allocated memory was 1.5 GB in the beginning and 4.9 GB in the end (delta: 3.3 GB). Free memory was 1.4 GB in the beginning and 3.6 GB in the end (delta: -2.2 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-10-23 18:35:55,460 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 18:35:55,460 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1827.96 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-23 18:35:55,461 INFO L168 Benchmark]: Boogie Procedure Inliner took 483.33 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -956.9 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. [2018-10-23 18:35:55,462 INFO L168 Benchmark]: Boogie Preprocessor took 251.80 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 7.1 GB. [2018-10-23 18:35:55,464 INFO L168 Benchmark]: RCFGBuilder took 7392.33 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 535.5 MB). Peak memory consumption was 535.5 MB. Max. memory is 7.1 GB. [2018-10-23 18:35:55,465 INFO L168 Benchmark]: TraceAbstraction took 215494.70 ms. Allocated memory was 2.3 GB in the beginning and 4.9 GB in the end (delta: 2.6 GB). Free memory was 1.7 GB in the beginning and 3.6 GB in the end (delta: -2.0 GB). Peak memory consumption was 595.0 MB. Max. memory is 7.1 GB. [2018-10-23 18:35:55,469 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1827.96 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 483.33 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -956.9 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 251.80 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7392.33 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 535.5 MB). Peak memory consumption was 535.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 215494.70 ms. Allocated memory was 2.3 GB in the beginning and 4.9 GB in the end (delta: 2.6 GB). Free memory was 1.7 GB in the beginning and 3.6 GB in the end (delta: -2.0 GB). Peak memory consumption was 595.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 84). Cancelled while BasicCegarLoop was constructing difference of abstraction (120263states) and FLOYD_HOARE automaton (currently 5 states, 5 states before enhancement),while ReachableStatesComputation was computing reachable states (92387 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 758 locations, 1 error locations. TIMEOUT Result, 215.3s OverallTime, 16 OverallIterations, 8 TraceHistogramMax, 154.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 8184 SDtfs, 54341 SDslu, 2089 SDs, 0 SdLazy, 89190 SolverSat, 17648 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 120.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7190 GetRequests, 7076 SyntacticMatches, 13 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 5.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=127864occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 10.7s AutomataMinimizationTime, 15 MinimizatonAttempts, 198407 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 21.1s InterpolantComputationTime, 27642 NumberOfCodeBlocks, 27642 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 27621 ConstructedInterpolants, 0 QuantifiedInterpolants, 92481157 SizeOfPredicates, 0 NumberOfNonLiveVariables, 7956 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 21 InterpolantComputations, 14 PerfectInterpolantSequences, 41277/43277 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown