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_label39_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 14:40:27,770 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 14:40:27,773 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 14:40:27,785 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 14:40:27,786 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 14:40:27,787 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 14:40:27,788 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 14:40:27,790 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 14:40:27,791 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 14:40:27,792 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 14:40:27,793 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 14:40:27,793 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 14:40:27,794 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 14:40:27,795 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 14:40:27,798 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 14:40:27,798 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 14:40:27,800 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 14:40:27,802 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 14:40:27,810 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 14:40:27,815 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 14:40:27,816 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 14:40:27,817 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 14:40:27,825 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 14:40:27,836 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 14:40:27,862 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 14:40:27,863 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 14:40:27,864 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 14:40:27,864 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 14:40:27,865 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 14:40:27,866 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 14:40:27,866 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 14:40:27,866 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 14:40:27,866 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 14:40:27,867 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 14:40:27,867 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 14:40:27,867 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 14:40:27,867 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 14:40:27,867 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 14:40:27,867 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 14:40:27,868 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 14:40:27,868 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 14:40:27,868 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 14:40:27,869 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 14:40:27,869 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 14:40:27,869 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 14:40:27,869 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 14:40:27,869 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 14:40:27,870 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 14:40:27,871 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 14:40:27,871 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 14:40:27,871 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 14:40:27,871 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 14:40:27,934 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 14:40:27,952 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 14:40:27,958 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 14:40:27,960 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 14:40:27,960 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 14:40:27,961 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label39_false-unreach-call.c [2018-10-24 14:40:28,026 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c4ee291ec/7ae7a09a0e424658a5e0313c211a95c5/FLAGc0440d015 [2018-10-24 14:40:28,723 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 14:40:28,724 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label39_false-unreach-call.c [2018-10-24 14:40:28,752 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c4ee291ec/7ae7a09a0e424658a5e0313c211a95c5/FLAGc0440d015 [2018-10-24 14:40:28,778 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c4ee291ec/7ae7a09a0e424658a5e0313c211a95c5 [2018-10-24 14:40:28,788 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 14:40:28,789 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 14:40:28,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 14:40:28,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 14:40:28,795 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 14:40:28,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:40:28" (1/1) ... [2018-10-24 14:40:28,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44fc0d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:40:28, skipping insertion in model container [2018-10-24 14:40:28,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:40:28" (1/1) ... [2018-10-24 14:40:28,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 14:40:28,954 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 14:40:29,963 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:40:29,968 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 14:40:30,442 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:40:30,472 INFO L193 MainTranslator]: Completed translation [2018-10-24 14:40:30,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:40:30 WrapperNode [2018-10-24 14:40:30,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 14:40:30,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 14:40:30,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 14:40:30,475 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 14:40:30,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:40:30" (1/1) ... [2018-10-24 14:40:30,552 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:40:30" (1/1) ... [2018-10-24 14:40:31,051 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 14:40:31,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 14:40:31,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 14:40:31,053 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 14:40:31,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:40:30" (1/1) ... [2018-10-24 14:40:31,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:40:30" (1/1) ... [2018-10-24 14:40:31,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:40:30" (1/1) ... [2018-10-24 14:40:31,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:40:30" (1/1) ... [2018-10-24 14:40:31,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:40:30" (1/1) ... [2018-10-24 14:40:31,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:40:30" (1/1) ... [2018-10-24 14:40:31,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:40:30" (1/1) ... [2018-10-24 14:40:31,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 14:40:31,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 14:40:31,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 14:40:31,321 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 14:40:31,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:40:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 14:40:31,394 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 14:40:31,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 14:40:31,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 14:40:38,551 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 14:40:38,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:40:38 BoogieIcfgContainer [2018-10-24 14:40:38,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 14:40:38,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 14:40:38,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 14:40:38,557 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 14:40:38,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:40:28" (1/3) ... [2018-10-24 14:40:38,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31c76a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:40:38, skipping insertion in model container [2018-10-24 14:40:38,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:40:30" (2/3) ... [2018-10-24 14:40:38,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31c76a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:40:38, skipping insertion in model container [2018-10-24 14:40:38,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:40:38" (3/3) ... [2018-10-24 14:40:38,563 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label39_false-unreach-call.c [2018-10-24 14:40:38,573 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 14:40:38,583 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 14:40:38,601 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 14:40:38,648 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 14:40:38,649 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 14:40:38,649 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 14:40:38,649 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 14:40:38,650 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 14:40:38,650 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 14:40:38,650 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 14:40:38,650 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 14:40:38,650 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 14:40:38,688 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states. [2018-10-24 14:40:38,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-24 14:40:38,696 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:40:38,697 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:40:38,700 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:40:38,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:40:38,708 INFO L82 PathProgramCache]: Analyzing trace with hash 340357962, now seen corresponding path program 1 times [2018-10-24 14:40:38,710 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:40:38,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:40:38,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:40:38,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:40:38,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:40:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:40:39,053 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-24 14:40:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:40:39,147 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:40:39,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:40:39,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:40:39,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:40:39,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:40:39,176 INFO L87 Difference]: Start difference. First operand 758 states. Second operand 4 states. [2018-10-24 14:40:51,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:40:51,420 INFO L93 Difference]: Finished difference Result 2902 states and 5650 transitions. [2018-10-24 14:40:51,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:40:51,423 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-10-24 14:40:51,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:40:51,462 INFO L225 Difference]: With dead ends: 2902 [2018-10-24 14:40:51,463 INFO L226 Difference]: Without dead ends: 2137 [2018-10-24 14:40:51,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:40:51,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2018-10-24 14:40:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 2137. [2018-10-24 14:40:51,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2137 states. [2018-10-24 14:40:51,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 3733 transitions. [2018-10-24 14:40:51,626 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 3733 transitions. Word has length 14 [2018-10-24 14:40:51,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:40:51,626 INFO L481 AbstractCegarLoop]: Abstraction has 2137 states and 3733 transitions. [2018-10-24 14:40:51,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:40:51,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 3733 transitions. [2018-10-24 14:40:51,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-24 14:40:51,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:40:51,631 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:40:51,631 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:40:51,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:40:51,632 INFO L82 PathProgramCache]: Analyzing trace with hash 743551834, now seen corresponding path program 1 times [2018-10-24 14:40:51,632 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:40:51,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:40:51,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:40:51,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:40:51,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:40:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:40:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:40:51,899 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:40:51,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:40:51,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:40:51,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:40:51,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:40:51,902 INFO L87 Difference]: Start difference. First operand 2137 states and 3733 transitions. Second operand 4 states. [2018-10-24 14:40:59,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:40:59,966 INFO L93 Difference]: Finished difference Result 6345 states and 11134 transitions. [2018-10-24 14:40:59,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:40:59,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2018-10-24 14:40:59,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:40:59,991 INFO L225 Difference]: With dead ends: 6345 [2018-10-24 14:40:59,991 INFO L226 Difference]: Without dead ends: 4210 [2018-10-24 14:40:59,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:41:00,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4210 states. [2018-10-24 14:41:00,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4210 to 4210. [2018-10-24 14:41:00,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4210 states. [2018-10-24 14:41:00,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4210 states to 4210 states and 6185 transitions. [2018-10-24 14:41:00,091 INFO L78 Accepts]: Start accepts. Automaton has 4210 states and 6185 transitions. Word has length 80 [2018-10-24 14:41:00,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:41:00,092 INFO L481 AbstractCegarLoop]: Abstraction has 4210 states and 6185 transitions. [2018-10-24 14:41:00,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:41:00,092 INFO L276 IsEmpty]: Start isEmpty. Operand 4210 states and 6185 transitions. [2018-10-24 14:41:00,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-24 14:41:00,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:41:00,096 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:41:00,096 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:41:00,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:41:00,100 INFO L82 PathProgramCache]: Analyzing trace with hash 662698863, now seen corresponding path program 1 times [2018-10-24 14:41:00,100 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:41:00,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:41:00,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:41:00,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:41:00,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:41:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:41:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:41:00,277 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:41:00,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:41:00,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:41:00,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:41:00,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:41:00,279 INFO L87 Difference]: Start difference. First operand 4210 states and 6185 transitions. Second operand 4 states. [2018-10-24 14:41:07,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:41:07,631 INFO L93 Difference]: Finished difference Result 16727 states and 24628 transitions. [2018-10-24 14:41:07,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:41:07,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2018-10-24 14:41:07,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:41:07,699 INFO L225 Difference]: With dead ends: 16727 [2018-10-24 14:41:07,700 INFO L226 Difference]: Without dead ends: 12519 [2018-10-24 14:41:07,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:41:07,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12519 states. [2018-10-24 14:41:07,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12519 to 8356. [2018-10-24 14:41:07,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8356 states. [2018-10-24 14:41:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8356 states to 8356 states and 10927 transitions. [2018-10-24 14:41:07,949 INFO L78 Accepts]: Start accepts. Automaton has 8356 states and 10927 transitions. Word has length 83 [2018-10-24 14:41:07,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:41:07,950 INFO L481 AbstractCegarLoop]: Abstraction has 8356 states and 10927 transitions. [2018-10-24 14:41:07,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:41:07,950 INFO L276 IsEmpty]: Start isEmpty. Operand 8356 states and 10927 transitions. [2018-10-24 14:41:07,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-24 14:41:07,952 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:41:07,952 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:41:07,953 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:41:07,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:41:07,953 INFO L82 PathProgramCache]: Analyzing trace with hash -2023094700, now seen corresponding path program 1 times [2018-10-24 14:41:07,953 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:41:07,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:41:07,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:41:07,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:41:07,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:41:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:41:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:41:08,345 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:41:08,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:41:08,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:41:08,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:41:08,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:41:08,348 INFO L87 Difference]: Start difference. First operand 8356 states and 10927 transitions. Second operand 4 states. [2018-10-24 14:41:14,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:41:14,877 INFO L93 Difference]: Finished difference Result 32603 states and 42820 transitions. [2018-10-24 14:41:14,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:41:14,878 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2018-10-24 14:41:14,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:41:14,936 INFO L225 Difference]: With dead ends: 32603 [2018-10-24 14:41:14,937 INFO L226 Difference]: Without dead ends: 20083 [2018-10-24 14:41:14,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:41:14,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20083 states. [2018-10-24 14:41:15,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20083 to 20083. [2018-10-24 14:41:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20083 states. [2018-10-24 14:41:15,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20083 states to 20083 states and 22439 transitions. [2018-10-24 14:41:15,257 INFO L78 Accepts]: Start accepts. Automaton has 20083 states and 22439 transitions. Word has length 108 [2018-10-24 14:41:15,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:41:15,258 INFO L481 AbstractCegarLoop]: Abstraction has 20083 states and 22439 transitions. [2018-10-24 14:41:15,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:41:15,258 INFO L276 IsEmpty]: Start isEmpty. Operand 20083 states and 22439 transitions. [2018-10-24 14:41:15,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-10-24 14:41:15,270 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:41:15,271 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 14:41:15,271 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:41:15,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:41:15,272 INFO L82 PathProgramCache]: Analyzing trace with hash 150843197, now seen corresponding path program 1 times [2018-10-24 14:41:15,272 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:41:15,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:41:15,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:41:15,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:41:15,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:41:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:41:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-10-24 14:41:16,160 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:41:16,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:41:16,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:41:16,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:41:16,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:41:16,162 INFO L87 Difference]: Start difference. First operand 20083 states and 22439 transitions. Second operand 5 states. [2018-10-24 14:41:22,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:41:22,336 INFO L93 Difference]: Finished difference Result 47074 states and 52335 transitions. [2018-10-24 14:41:22,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:41:22,337 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 368 [2018-10-24 14:41:22,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:41:22,383 INFO L225 Difference]: With dead ends: 47074 [2018-10-24 14:41:22,384 INFO L226 Difference]: Without dead ends: 26993 [2018-10-24 14:41:22,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 14:41:22,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26993 states. [2018-10-24 14:41:22,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26993 to 25611. [2018-10-24 14:41:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25611 states. [2018-10-24 14:41:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25611 states to 25611 states and 28083 transitions. [2018-10-24 14:41:22,722 INFO L78 Accepts]: Start accepts. Automaton has 25611 states and 28083 transitions. Word has length 368 [2018-10-24 14:41:22,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:41:22,722 INFO L481 AbstractCegarLoop]: Abstraction has 25611 states and 28083 transitions. [2018-10-24 14:41:22,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:41:22,723 INFO L276 IsEmpty]: Start isEmpty. Operand 25611 states and 28083 transitions. [2018-10-24 14:41:22,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1105 [2018-10-24 14:41:22,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:41:22,778 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:41:22,778 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:41:22,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:41:22,779 INFO L82 PathProgramCache]: Analyzing trace with hash 2141634323, now seen corresponding path program 1 times [2018-10-24 14:41:22,779 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:41:22,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:41:22,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:41:22,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:41:22,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:41:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:41:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 658 proven. 0 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2018-10-24 14:41:24,348 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:41:24,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:41:24,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:41:24,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:41:24,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:41:24,351 INFO L87 Difference]: Start difference. First operand 25611 states and 28083 transitions. Second operand 4 states. [2018-10-24 14:41:30,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:41:30,174 INFO L93 Difference]: Finished difference Result 72651 states and 81328 transitions. [2018-10-24 14:41:30,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:41:30,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1104 [2018-10-24 14:41:30,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:41:30,257 INFO L225 Difference]: With dead ends: 72651 [2018-10-24 14:41:30,257 INFO L226 Difference]: Without dead ends: 47733 [2018-10-24 14:41:30,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:41:30,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47733 states. [2018-10-24 14:41:30,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47733 to 47733. [2018-10-24 14:41:30,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47733 states. [2018-10-24 14:41:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47733 states to 47733 states and 51776 transitions. [2018-10-24 14:41:30,750 INFO L78 Accepts]: Start accepts. Automaton has 47733 states and 51776 transitions. Word has length 1104 [2018-10-24 14:41:30,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:41:30,751 INFO L481 AbstractCegarLoop]: Abstraction has 47733 states and 51776 transitions. [2018-10-24 14:41:30,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:41:30,752 INFO L276 IsEmpty]: Start isEmpty. Operand 47733 states and 51776 transitions. [2018-10-24 14:41:30,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1119 [2018-10-24 14:41:30,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:41:30,805 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:41:30,805 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:41:30,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:41:30,806 INFO L82 PathProgramCache]: Analyzing trace with hash -272164074, now seen corresponding path program 1 times [2018-10-24 14:41:30,806 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:41:30,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:41:30,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:41:30,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:41:30,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:41:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:41:31,671 WARN L179 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-24 14:41:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 672 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2018-10-24 14:41:32,782 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:41:32,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:41:32,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:41:32,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:41:32,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:41:32,784 INFO L87 Difference]: Start difference. First operand 47733 states and 51776 transitions. Second operand 4 states. [2018-10-24 14:41:39,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:41:39,013 INFO L93 Difference]: Finished difference Result 128632 states and 139923 transitions. [2018-10-24 14:41:39,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:41:39,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1118 [2018-10-24 14:41:39,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:41:39,132 INFO L225 Difference]: With dead ends: 128632 [2018-10-24 14:41:39,133 INFO L226 Difference]: Without dead ends: 81592 [2018-10-24 14:41:39,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:41:39,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81592 states. [2018-10-24 14:41:39,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81592 to 79519. [2018-10-24 14:41:39,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79519 states. [2018-10-24 14:41:40,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79519 states to 79519 states and 85159 transitions. [2018-10-24 14:41:40,052 INFO L78 Accepts]: Start accepts. Automaton has 79519 states and 85159 transitions. Word has length 1118 [2018-10-24 14:41:40,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:41:40,054 INFO L481 AbstractCegarLoop]: Abstraction has 79519 states and 85159 transitions. [2018-10-24 14:41:40,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:41:40,054 INFO L276 IsEmpty]: Start isEmpty. Operand 79519 states and 85159 transitions. [2018-10-24 14:41:40,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1297 [2018-10-24 14:41:40,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:41:40,103 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:41:40,103 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:41:40,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:41:40,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1711964959, now seen corresponding path program 1 times [2018-10-24 14:41:40,104 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:41:40,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:41:40,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:41:40,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:41:40,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:41:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:41:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 955 proven. 901 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2018-10-24 14:41:44,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:41:44,488 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:41:44,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:41:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:41:44,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:41:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 1110 proven. 0 refuted. 0 times theorem prover too weak. 964 trivial. 0 not checked. [2018-10-24 14:41:45,927 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:41:45,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2018-10-24 14:41:45,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 14:41:45,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 14:41:45,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-10-24 14:41:45,931 INFO L87 Difference]: Start difference. First operand 79519 states and 85159 transitions. Second operand 12 states. [2018-10-24 14:42:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:42:09,174 INFO L93 Difference]: Finished difference Result 219014 states and 237115 transitions. [2018-10-24 14:42:09,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-24 14:42:09,174 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1296 [2018-10-24 14:42:09,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:42:09,459 INFO L225 Difference]: With dead ends: 219014 [2018-10-24 14:42:09,460 INFO L226 Difference]: Without dead ends: 140188 [2018-10-24 14:42:09,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1339 GetRequests, 1309 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=224, Invalid=646, Unknown=0, NotChecked=0, Total=870 [2018-10-24 14:42:09,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140188 states. [2018-10-24 14:42:11,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140188 to 96789. [2018-10-24 14:42:11,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96789 states. [2018-10-24 14:42:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96789 states to 96789 states and 102779 transitions. [2018-10-24 14:42:11,334 INFO L78 Accepts]: Start accepts. Automaton has 96789 states and 102779 transitions. Word has length 1296 [2018-10-24 14:42:11,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:42:11,336 INFO L481 AbstractCegarLoop]: Abstraction has 96789 states and 102779 transitions. [2018-10-24 14:42:11,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 14:42:11,337 INFO L276 IsEmpty]: Start isEmpty. Operand 96789 states and 102779 transitions. [2018-10-24 14:42:11,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1350 [2018-10-24 14:42:11,389 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:42:11,390 INFO L375 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:42:11,391 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:42:11,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:42:11,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1463033272, now seen corresponding path program 1 times [2018-10-24 14:42:11,392 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:42:11,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:42:11,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:42:11,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:42:11,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:42:11,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:42:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1965 backedges. 1083 proven. 6 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-24 14:42:14,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:42:14,039 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:42:14,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:42:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:42:14,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:42:15,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1965 backedges. 1083 proven. 0 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-10-24 14:42:15,948 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:42:15,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2018-10-24 14:42:15,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:42:15,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:42:15,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:42:15,951 INFO L87 Difference]: Start difference. First operand 96789 states and 102779 transitions. Second operand 5 states. [2018-10-24 14:42:21,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:42:21,247 INFO L93 Difference]: Finished difference Result 214305 states and 227844 transitions. [2018-10-24 14:42:21,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:42:21,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1349 [2018-10-24 14:42:21,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:42:21,406 INFO L225 Difference]: With dead ends: 214305 [2018-10-24 14:42:21,406 INFO L226 Difference]: Without dead ends: 118209 [2018-10-24 14:42:21,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1351 GetRequests, 1348 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:42:21,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118209 states. [2018-10-24 14:42:22,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118209 to 115445. [2018-10-24 14:42:22,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115445 states. [2018-10-24 14:42:22,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115445 states to 115445 states and 121622 transitions. [2018-10-24 14:42:22,662 INFO L78 Accepts]: Start accepts. Automaton has 115445 states and 121622 transitions. Word has length 1349 [2018-10-24 14:42:22,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:42:22,662 INFO L481 AbstractCegarLoop]: Abstraction has 115445 states and 121622 transitions. [2018-10-24 14:42:22,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:42:22,663 INFO L276 IsEmpty]: Start isEmpty. Operand 115445 states and 121622 transitions. [2018-10-24 14:42:22,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1370 [2018-10-24 14:42:22,704 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:42:22,705 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:42:22,705 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:42:22,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:42:22,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1977725816, now seen corresponding path program 1 times [2018-10-24 14:42:22,706 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:42:22,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:42:22,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:42:22,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:42:22,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:42:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:42:23,689 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-24 14:42:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 1434 proven. 0 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2018-10-24 14:42:25,154 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:42:25,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:42:25,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:42:25,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:42:25,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:42:25,156 INFO L87 Difference]: Start difference. First operand 115445 states and 121622 transitions. Second operand 4 states. [2018-10-24 14:42:31,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:42:31,074 INFO L93 Difference]: Finished difference Result 235035 states and 247542 transitions. [2018-10-24 14:42:31,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:42:31,075 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1369 [2018-10-24 14:42:31,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:42:31,208 INFO L225 Difference]: With dead ends: 235035 [2018-10-24 14:42:31,209 INFO L226 Difference]: Without dead ends: 120283 [2018-10-24 14:42:31,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:42:31,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120283 states. [2018-10-24 14:42:32,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120283 to 116827. [2018-10-24 14:42:32,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116827 states. [2018-10-24 14:42:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116827 states to 116827 states and 122821 transitions. [2018-10-24 14:42:32,342 INFO L78 Accepts]: Start accepts. Automaton has 116827 states and 122821 transitions. Word has length 1369 [2018-10-24 14:42:32,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:42:32,343 INFO L481 AbstractCegarLoop]: Abstraction has 116827 states and 122821 transitions. [2018-10-24 14:42:32,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:42:32,343 INFO L276 IsEmpty]: Start isEmpty. Operand 116827 states and 122821 transitions. [2018-10-24 14:42:32,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1391 [2018-10-24 14:42:32,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:42:32,377 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:42:32,377 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:42:32,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:42:32,378 INFO L82 PathProgramCache]: Analyzing trace with hash 244766463, now seen corresponding path program 1 times [2018-10-24 14:42:32,378 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:42:32,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:42:32,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:42:32,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:42:32,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:42:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:42:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1461 proven. 0 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-10-24 14:42:34,040 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:42:34,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:42:34,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:42:34,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:42:34,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:42:34,042 INFO L87 Difference]: Start difference. First operand 116827 states and 122821 transitions. Second operand 4 states. [2018-10-24 14:42:39,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:42:39,157 INFO L93 Difference]: Finished difference Result 237798 states and 249840 transitions. [2018-10-24 14:42:39,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:42:39,158 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1390 [2018-10-24 14:42:39,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:42:39,280 INFO L225 Difference]: With dead ends: 237798 [2018-10-24 14:42:39,280 INFO L226 Difference]: Without dead ends: 121664 [2018-10-24 14:42:39,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:42:39,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121664 states. [2018-10-24 14:42:40,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121664 to 120282. [2018-10-24 14:42:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120282 states. [2018-10-24 14:42:40,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120282 states to 120282 states and 125284 transitions. [2018-10-24 14:42:40,298 INFO L78 Accepts]: Start accepts. Automaton has 120282 states and 125284 transitions. Word has length 1390 [2018-10-24 14:42:40,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:42:40,299 INFO L481 AbstractCegarLoop]: Abstraction has 120282 states and 125284 transitions. [2018-10-24 14:42:40,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:42:40,299 INFO L276 IsEmpty]: Start isEmpty. Operand 120282 states and 125284 transitions. [2018-10-24 14:42:40,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1496 [2018-10-24 14:42:40,338 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:42:40,339 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:42:40,339 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:42:40,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:42:40,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1970607365, now seen corresponding path program 1 times [2018-10-24 14:42:40,340 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:42:40,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:42:40,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:42:40,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:42:40,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:42:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:42:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 1665 proven. 0 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-10-24 14:42:42,644 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:42:42,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:42:42,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:42:42,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:42:42,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:42:42,646 INFO L87 Difference]: Start difference. First operand 120282 states and 125284 transitions. Second operand 4 states. [2018-10-24 14:42:49,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:42:49,018 INFO L93 Difference]: Finished difference Result 259225 states and 270401 transitions. [2018-10-24 14:42:49,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:42:49,019 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1495 [2018-10-24 14:42:49,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:42:49,159 INFO L225 Difference]: With dead ends: 259225 [2018-10-24 14:42:49,159 INFO L226 Difference]: Without dead ends: 139636 [2018-10-24 14:42:49,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:42:49,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139636 states. [2018-10-24 14:42:50,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139636 to 126501. [2018-10-24 14:42:50,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126501 states. [2018-10-24 14:42:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126501 states to 126501 states and 131667 transitions. [2018-10-24 14:42:50,461 INFO L78 Accepts]: Start accepts. Automaton has 126501 states and 131667 transitions. Word has length 1495 [2018-10-24 14:42:50,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:42:50,462 INFO L481 AbstractCegarLoop]: Abstraction has 126501 states and 131667 transitions. [2018-10-24 14:42:50,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:42:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 126501 states and 131667 transitions. [2018-10-24 14:42:50,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1531 [2018-10-24 14:42:50,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:42:50,510 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:42:50,510 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:42:50,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:42:50,511 INFO L82 PathProgramCache]: Analyzing trace with hash 163826486, now seen corresponding path program 1 times [2018-10-24 14:42:50,511 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:42:50,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:42:50,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:42:50,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:42:50,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:42:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:42:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2877 backedges. 2074 proven. 108 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2018-10-24 14:42:53,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:42:53,241 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:42:53,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:42:53,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:42:53,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:42:57,005 WARN L179 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 1877 DAG size of output: 26 [2018-10-24 14:42:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2877 backedges. 1871 proven. 93 refuted. 0 times theorem prover too weak. 913 trivial. 0 not checked. [2018-10-24 14:42:59,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:42:59,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2018-10-24 14:42:59,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 14:42:59,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 14:42:59,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:42:59,233 INFO L87 Difference]: Start difference. First operand 126501 states and 131667 transitions. Second operand 7 states. [2018-10-24 14:43:22,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:43:22,518 INFO L93 Difference]: Finished difference Result 277192 states and 288400 transitions. [2018-10-24 14:43:22,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 14:43:22,518 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1530 [2018-10-24 14:43:22,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:43:22,691 INFO L225 Difference]: With dead ends: 277192 [2018-10-24 14:43:22,691 INFO L226 Difference]: Without dead ends: 151384 [2018-10-24 14:43:22,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1538 GetRequests, 1531 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-10-24 14:43:22,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151384 states. [2018-10-24 14:43:23,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151384 to 130646. [2018-10-24 14:43:23,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130646 states. [2018-10-24 14:43:23,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130646 states to 130646 states and 135257 transitions. [2018-10-24 14:43:23,966 INFO L78 Accepts]: Start accepts. Automaton has 130646 states and 135257 transitions. Word has length 1530 [2018-10-24 14:43:23,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:43:23,967 INFO L481 AbstractCegarLoop]: Abstraction has 130646 states and 135257 transitions. [2018-10-24 14:43:23,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 14:43:23,967 INFO L276 IsEmpty]: Start isEmpty. Operand 130646 states and 135257 transitions. [2018-10-24 14:43:24,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1591 [2018-10-24 14:43:24,007 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:43:24,008 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:43:24,008 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:43:24,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:43:24,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1938229170, now seen corresponding path program 1 times [2018-10-24 14:43:24,009 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:43:24,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:43:24,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:43:24,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:43:24,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:43:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:43:29,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 882 proven. 93 refuted. 0 times theorem prover too weak. 1270 trivial. 0 not checked. [2018-10-24 14:43:29,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:43:29,223 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:43:29,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:43:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:43:29,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:43:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 882 proven. 93 refuted. 0 times theorem prover too weak. 1270 trivial. 0 not checked. [2018-10-24 14:43:31,533 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:43:31,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-10-24 14:43:31,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 14:43:31,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 14:43:31,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-24 14:43:31,536 INFO L87 Difference]: Start difference. First operand 130646 states and 135257 transitions. Second operand 6 states. [2018-10-24 14:43:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:43:42,724 INFO L93 Difference]: Finished difference Result 288250 states and 298323 transitions. [2018-10-24 14:43:42,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:43:42,725 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1590 [2018-10-24 14:43:42,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:43:42,878 INFO L225 Difference]: With dead ends: 288250 [2018-10-24 14:43:42,879 INFO L226 Difference]: Without dead ends: 158297 [2018-10-24 14:43:42,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1595 GetRequests, 1589 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-24 14:43:43,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158297 states. [2018-10-24 14:43:44,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158297 to 135485. [2018-10-24 14:43:44,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135485 states. [2018-10-24 14:43:44,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135485 states to 135485 states and 140229 transitions. [2018-10-24 14:43:44,615 INFO L78 Accepts]: Start accepts. Automaton has 135485 states and 140229 transitions. Word has length 1590 [2018-10-24 14:43:44,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:43:44,616 INFO L481 AbstractCegarLoop]: Abstraction has 135485 states and 140229 transitions. [2018-10-24 14:43:44,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 14:43:44,616 INFO L276 IsEmpty]: Start isEmpty. Operand 135485 states and 140229 transitions. [2018-10-24 14:43:44,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1597 [2018-10-24 14:43:44,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:43:44,659 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:43:44,660 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:43:44,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:43:44,660 INFO L82 PathProgramCache]: Analyzing trace with hash -369353464, now seen corresponding path program 1 times [2018-10-24 14:43:44,660 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:43:44,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:43:44,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:43:44,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:43:44,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:43:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:43:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 1889 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2018-10-24 14:43:46,457 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:43:46,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:43:46,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:43:46,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:43:46,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:43:46,459 INFO L87 Difference]: Start difference. First operand 135485 states and 140229 transitions. Second operand 4 states. [2018-10-24 14:43:51,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:43:51,328 INFO L93 Difference]: Finished difference Result 268893 states and 278374 transitions. [2018-10-24 14:43:51,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:43:51,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1596 [2018-10-24 14:43:51,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:43:51,454 INFO L225 Difference]: With dead ends: 268893 [2018-10-24 14:43:51,455 INFO L226 Difference]: Without dead ends: 121643 [2018-10-24 14:43:51,511 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 [2018-10-24 14:43:51,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121643 states. [2018-10-24 14:43:52,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121643 to 120260. [2018-10-24 14:43:52,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120260 states. [2018-10-24 14:43:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120260 states to 120260 states and 123508 transitions. [2018-10-24 14:43:52,480 INFO L78 Accepts]: Start accepts. Automaton has 120260 states and 123508 transitions. Word has length 1596 [2018-10-24 14:43:52,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:43:52,481 INFO L481 AbstractCegarLoop]: Abstraction has 120260 states and 123508 transitions. [2018-10-24 14:43:52,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:43:52,481 INFO L276 IsEmpty]: Start isEmpty. Operand 120260 states and 123508 transitions. [2018-10-24 14:43:52,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1602 [2018-10-24 14:43:52,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:43:52,517 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:43:52,518 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:43:52,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:43:52,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1212665214, now seen corresponding path program 1 times [2018-10-24 14:43:52,518 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:43:52,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:43:52,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:43:52,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:43:52,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:43:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:43:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2659 backedges. 1627 proven. 0 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2018-10-24 14:43:54,933 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:43:54,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:43:54,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:43:54,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:43:54,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:43:54,935 INFO L87 Difference]: Start difference. First operand 120260 states and 123508 transitions. Second operand 4 states. [2018-10-24 14:43:59,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:43:59,933 INFO L93 Difference]: Finished difference Result 242590 states and 249230 transitions. [2018-10-24 14:43:59,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:43:59,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1601 [2018-10-24 14:43:59,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:44:00,051 INFO L225 Difference]: With dead ends: 242590 [2018-10-24 14:44:00,051 INFO L226 Difference]: Without dead ends: 123023 [2018-10-24 14:44:00,110 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 [2018-10-24 14:44:00,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123023 states. [2018-10-24 14:44:01,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123023 to 122332. [2018-10-24 14:44:01,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122332 states. [2018-10-24 14:44:01,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122332 states to 122332 states and 125277 transitions. [2018-10-24 14:44:01,492 INFO L78 Accepts]: Start accepts. Automaton has 122332 states and 125277 transitions. Word has length 1601 [2018-10-24 14:44:01,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:44:01,493 INFO L481 AbstractCegarLoop]: Abstraction has 122332 states and 125277 transitions. [2018-10-24 14:44:01,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:44:01,493 INFO L276 IsEmpty]: Start isEmpty. Operand 122332 states and 125277 transitions. [2018-10-24 14:44:01,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1619 [2018-10-24 14:44:01,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:44:01,525 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2018-10-24 14:44:01,525 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:44:01,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:44:01,526 INFO L82 PathProgramCache]: Analyzing trace with hash 324570657, now seen corresponding path program 1 times [2018-10-24 14:44:01,526 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:44:01,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:44:01,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:44:01,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:44:01,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:44:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:44:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3833 backedges. 2334 proven. 802 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2018-10-24 14:44:06,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:44:06,076 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:44:06,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:44:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:44:06,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:44:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3833 backedges. 1627 proven. 0 refuted. 0 times theorem prover too weak. 2206 trivial. 0 not checked. [2018-10-24 14:44:07,659 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:44:07,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2018-10-24 14:44:07,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 14:44:07,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 14:44:07,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-10-24 14:44:07,661 INFO L87 Difference]: Start difference. First operand 122332 states and 125277 transitions. Second operand 12 states. Received shutdown request... [2018-10-24 14:44:11,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:44:11,087 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 14:44:11,092 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 14:44:11,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:44:11 BoogieIcfgContainer [2018-10-24 14:44:11,093 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 14:44:11,094 INFO L168 Benchmark]: Toolchain (without parser) took 222305.10 ms. Allocated memory was 1.5 GB in the beginning and 4.7 GB in the end (delta: 3.2 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -740.0 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-10-24 14:44:11,094 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 14:44:11,096 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1683.04 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 148.0 MB). Peak memory consumption was 148.0 MB. Max. memory is 7.1 GB. [2018-10-24 14:44:11,096 INFO L168 Benchmark]: Boogie Procedure Inliner took 577.63 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 778.0 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -946.5 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. [2018-10-24 14:44:11,099 INFO L168 Benchmark]: Boogie Preprocessor took 268.21 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 44.2 MB). Peak memory consumption was 44.2 MB. Max. memory is 7.1 GB. [2018-10-24 14:44:11,100 INFO L168 Benchmark]: RCFGBuilder took 7231.85 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.6 GB in the end (delta: 511.1 MB). Peak memory consumption was 511.1 MB. Max. memory is 7.1 GB. [2018-10-24 14:44:11,101 INFO L168 Benchmark]: TraceAbstraction took 212539.35 ms. Allocated memory was 2.3 GB in the beginning and 4.7 GB in the end (delta: 2.4 GB). Free memory was 1.6 GB in the beginning and 2.1 GB in the end (delta: -496.8 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-10-24 14:44:11,108 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1683.04 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 148.0 MB). Peak memory consumption was 148.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 577.63 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 778.0 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -946.5 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 268.21 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 44.2 MB). Peak memory consumption was 44.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7231.85 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.6 GB in the end (delta: 511.1 MB). Peak memory consumption was 511.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 212539.35 ms. Allocated memory was 2.3 GB in the beginning and 4.7 GB in the end (delta: 2.4 GB). Free memory was 1.6 GB in the beginning and 2.1 GB in the end (delta: -496.8 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 48). Cancelled while BasicCegarLoop was constructing difference of abstraction (122332states) and FLOYD_HOARE automaton (currently 4 states, 12 states before enhancement),while ReachableStatesComputation was computing reachable states (638 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 758 locations, 1 error locations. TIMEOUT Result, 212.4s OverallTime, 17 OverallIterations, 10 TraceHistogramMax, 148.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 10567 SDtfs, 36976 SDslu, 1906 SDs, 0 SdLazy, 93819 SolverSat, 11183 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 115.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7505 GetRequests, 7415 SyntacticMatches, 11 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 7.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=135485occurred 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: 13.9s AutomataMinimizationTime, 16 MinimizatonAttempts, 117378 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 22.2s InterpolantComputationTime, 25092 NumberOfCodeBlocks, 25092 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 25070 ConstructedInterpolants, 186 QuantifiedInterpolants, 86611570 SizeOfPredicates, 2 NumberOfNonLiveVariables, 8545 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 22 InterpolantComputations, 15 PerfectInterpolantSequences, 38365/40461 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown